Motorized bike hp carburetor adjustment Apr 1, 2014 · How to Basic | Install Throttle to Carburetor | Motorized BikesThis is a quick step-by-step guide on installing the throttle cable to an NT carburetor. Complete add on performance kit Includes: Modified Dio cylinder; 21mm OKO flat side carb (includes 3 jet sizes: 0. I decided to make a newer video that hopefully explains WHY you adjust carb idle mixture as well as shows how. Firestorm Zeda 80 Complete Engine Kit Includes: Firestorm Zeda80 2. The carburetor you linked to is available from several other sources. But on a motorized bicycle with a less-restrictive exhaust, a higher load placed on the engine, etc. - Speed depends on rear sprocket ratio and weight of rider, weight of bike, the climate and Information about a two-stroke motorized bicycle carburetor and idle settings. This mostly affects the less than wide open area of throttle. The infographic is designed to provide easy-to-follow tips and tricks for motorized bike enthusiasts to optimize their 2 stroke bicycle motor for maximum power and speed. Nov 9, 2009 · Hi Chainmaker, There are several manuals about the American Whizzers. Even with all the knowledge you have about carburetors and what’s best for various bike engines, it can still be hard pulling the trigger on a carburetor for your motorized bike. 6. Get your H. Matt Jun 17, 2014 · BOOSTS PERFORMANCE: The BBR Tuning 2-Stroke Motorized Bicycle Engine 66/80cc High Performance Carburetor drastically increases airflow and fuel delivery resulting in more power. e. 00 with coupon Hidden 'LOW' Adjuster Screw Video here: https://www. Different manufacturers have different carburetor setups. On the left side of the carburetor near the front is the idle mixture screw. That's it. This means no drilling, cutting, bending, grinding or welding. . Carb http://bit. Accelerator adjustment screw, two turns counter-clockwise from seated. 4cc) Jan 5, 2012 · Motorized Bicycle Forums. Take into account however that the more suited size carb you are running the easier the bike is to tune the carb. leave it there at first. Help me This video is a 3 part series on 80cc/66cc Motorized Bicycles where I go over tips and mods for improving assembly of the kit, common mistakes, performance i Nov 26, 2015 · Racing, speed, high performance, are all examples of marketing 'buzz words'. Parts #13-15, 22-26, and 33-50 on the Fuel Components Diagram The big advantage of using Sep 26, 2022 · Hey guys new to this forum! I recently took up the hobby of building a bike and already have quite a few upgrades (mz pipe, high compression head, kinda-ported cyclinder) Problem is the engine seems to 4 stroke at high rpms and i would like to upgrade to a new carburetor as well. 41mm) The idle mixture screw is only one facet of overall carburetor jetting, however it is one of the first places to start when diagnosing a poorly running bike (motorcycle) or ATV (quad). This video from Bike Berry compares the HP and NT C Jan 22, 2008 · Re: Carb pictures how to. Browse our shop for the best prices on high quality engines, parts, and accessories. A rough guide to engine/carb size is 50cc – 18mm carb size 88cc – 20mm carb size 110cc – 22mm carb size 125cc – 22/24mm carb size 140cc – 24/26mm carb size Mar 15, 2013 · Changing the jets of any 2 stroke engine is considered a fundamental aspect of tuning. Additional types of carburetors: constant pressure carburetor, throttle body carburetor, electronically controlled carburetor. If you want to see how I got to 50mph fr This is the best way I came up with to use the stock throttle cable that came with my engine kit with the upgraded HP carb. If you are looking "how to tune a carburetor" or "How to re jet a carburetor" I have got you covered. 99 $ 39 . Start bike, bring to operating temperature. Learn how to achieve the right fuel and air mixture, identify carburetor issues, and fine-tune for peak performance. With an air fuel mixture screw and idle screw makes this Carb fully tunable. Whether you’re looking for a budget friend, cheap bicycle engine kit or the best bicycle gas motor money can buy, we’re sure to have the one for you. youtube. Apr 25, 2013 · In this part 1 of two video i am showing you where the different parts and adjustments are on my old honda with a new carbie works on most small carbies. pic 14 you would have a small flow jet but the setup is about Jan 4, 2009 · If you take apart the slide there is a long needle. motorbike Motorized Bike Carburetor Throttle Cable Assembly Kit Compatible with 2 Stroke Engine 100cc 80cc 50cc 49cc 66cc Gas Motor Motorized Bicycle Powersports Parts 7/8 22mm Handlebar 4. My New Partner - https://bit. BBR Tuning 100cc Motorized Bicycle Engine Kit Includes: BBR Tuning 100cc Motorized Bicycle Engine 3+ HP Engine with one piece cylinder/head; 50mm Bore, 40mm Crank Stroke; NT Carburetor; Angled LD Z8C spark plug; Super magneto; Yamaha-style high performance CDI; Upgraded allen bolts; Balanced crank w/ upgraded bearings Jun 22, 2022 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Carburetor problems? Bike have a bog when twisting the throttle? Here is how to properly adjust the mixture. Verify carburetor is set to stock settings: Idle mixture screw, 11/4 turns from lightly seated. I have watched many videos online and have tried to fix the problem myself but absolutely nothing works. Fortunately, while the main bore is slightly more complex in shape than a simple cylinder, it does run straight through (no curves) making it easy to modify The 2-Stroke Speed Carburetor adds a boost of power to nearly all 2-stroke 48cc and 66/80cc motorized bicycle engine kits. Simply take the cable housing inl Oct 29, 2021 · Regulating fuel to the engine, the 2-Stroke NT Carburetor is the most one of the most crucial components or your bike engine. Not a bad carb but it isn't going to fix your problem. Nov 22, 2008 · Hi, Things are running better now with the new intake gasket, Carburetor-Intake Pipe O-Ring, and Fresh Gas & Oil 32:1 mixture. You’ll see all kinds of carburetors out there that tout all sorts of benefits. Also, what is up with that screw on the carb. Buyer accepts responsibility for any and all vehicle operation that may lead to personal injury, economic loss, social distress, other losses, costs and damages resulting from operating this motorized bicycle or bicycle Looking for a safe and efficient alternative to pedaling your bicycle? Bicycle-Engines. Adjusting from Idle to 1/4 throttle range. 2 Stroke Motorized Bicycle Tuning Center Operating a bike, motorized bicycle or bike with a bicycle engine kit installed involves some risks of serious bodily injury. Idle speed screw, ½ turn clockwise from engagement point. How to start a motorized bicycle; Motorized bicycle clutch adjustment; Motorized Bicycle – The Grand Tour; Rat bike motorized bicycles and rat rod bicycles; Drift Trikes – The best way to get Sideways; Banana seat bikes – Simply game changing! 2 Stroke Motorized Bicycle Tuning Center. 026 is stock dia. Motorized Bike Carburetor Throttle Cable Assembly Kit Compatible with 2 Stroke Engine 100cc 80cc 50cc 49cc 66cc Gas Motor Motorized Bicycle Powersports Parts 7/8 22mm Handlebar $28. Jul 19, 2018 · Do you want to elevate the problem of cold start of your bike? Does your engine overheat whenever you race your mean machine? If your bike is not running smooth and the fuel efficiency has reduced to a great extent then tuning your carburetor can help in optimal power delivery and improved performance of your bike. When it comes to selecting a carburetor for your motorized bike, it’s essential to consider factors such as engine size, fuel type, and desired performance. Engine Trouble 66/80cc A couple carb adjustment questions Joast; Oct 19, 2022; 2-Stroke Engines; Replies 6 Views 2K. Most adjustment can be made with the e-clip on the needle. If you search by part number 640152 on your listing example this carbs looks like more for 8 -10hp engines not the 3 - 4 hp like what you want. 39mm, and 0. If the bike sputters or sounds rough when giving it throttle, raise the clip (lowering the needle) until it runs cleanly. , it seems like that range is way too narrow to get the correct We go into the engineering detail of how a carburetor for a motorized bicycle works. The most information about repairing or rebuilding the vintage motors is in the book called "Service Facts". Affixed to the intake manifold and connected to the throttle cable and fuel line, this part is filled with fuel as the throttle grip is twisted. Tom and Tirebiter are correct for this particular carb. The slide regulates the flow of air into the engine. Your NT carburetor will give you all the performance you can expect from a stock Chinese 2 stroke. Its very hard to start the bike, you have to pedal it to 20kmh, to run, it accelarates very slow, and not running at idle, Also, there is 3 pipes going from carburetor, what should I do with them? There is no issues with the old carburetor. Maybe that and the pipe together will give me a tad more. 00 off coupon applied Save $2. Feb 9, 2024 · Constant pressure carburetor: Variable air funnel cross section; Use in Harley Davidsons. also, there is a little metal thing that looks like a primer from a gun next to it like a little button #motorizedbike #80cc #66cc #motorcycles#ride #bikes #bikeberry #bbr tuning #2stroke #welding Mar 1, 2017 · FVRITO Performance Chrome Exhaust Muffler Expansion Chamber Pipe Silencer Gasket for 2 Stroke 50cc 66cc 80cc 100cc Engine Gas Motorized Bicycle Motor Bike Silver $39. displacement 69. [Engine – Fuel screw – Carburetor]. I bought an 80cc 2 stroke from boygofast on ebay. 4 cycle engines require little maintenance. 1 out of 5 stars 500 1 offer from $1499 $ 14 99 1. 2 Stroke Motorized Bicycle Tuning Center Aug 9, 2024 · To get a 2 Stroke motorized bike engine up and running it’s best you need to learn how to adjust the carburetor properly. Jul 16, 2013 · ADJUSTMENT INSTRUCTIONS To properly adjust carburetor for best performance the engine must be thoroughly warm. Cleaned it, put it back on, rides like it's choked. I’ll try a 22mm carb like you suggested. This will not only increase the bike’s engine life but will also give you an Does your bike throttle have this problem. Prepare a flat-head screwdriver, a wrench set, and, if your vehicle lacks one, a tachometer. The CNS carburetor is designed to improve airflow, fuel efficiency, increase speed. The reason it is illegal is that any bicycle, fitted with a motor (gas or electric) may not be modified in any way. 3. Raise the needle jet clip to lean the Today we go over the basics to getting your 2 stroke running at peak performance. 5 HP this bicycle engine gets about 100 to 150 mpg and can hits speeds of 35 MPH or more. Download the Carb Tuning Guide Watch the Super E & G Carb Basic Setup video. Sep 12, 2016 · The motor should have at least 5 minutes running time before any adjustments are made. May 31, 2019 · Great info,thank you! I already welded up a straight pipe,and had no power/speed increase from it. You’ll want to be sure to try the following before operation: Set the adjusting screw all the way down. Just started it up and that wasn't the issue. ??? If so this video might help correct it. Ride the bike a few miles then shut down the motor and let it cool. Dellorto Tuning Guide 10,212 KB . Throttle cable slack. 99 $2. 95 HP 2 stroke Engine (Actual U. Stock position should be 2nd from the top. Hey guys welcome back in today's video we will be discussing the issues with the Hp carb and how to solve them. Step 1: Select a proper donor bike: Donor bikes with 28 mm to 38 mm diameter front down tubes and 28 mm diameter seat tubes are recommended due to the smaller outer diameter of frame tubing. Different carburetors have varying flow rates and designs, catering to specific engine configurations and power requirements. Apr 18, 2009 · Ride the bike between these two marks. Apr 17, 2020 · Custom-made angled 20mm I. it did a little wheelie and the chain snapped out. More pictures and information here: https://www Hey guys in todays video we will be taking a look at how I adjust the ignition timing curve on my motor. P. Oct 11, 2010 · Just bought a HP carb for my 80cc and a new intake manifold that is shorter so the air filter would fit on. When your motorized bike’s in need of more power, this High-Performance Carburetor will have you flying down the track faster than ever. com — In this video, BikeBerry. Simply add gas and oil and the engine is ready to operate. I will show you step by step how to rejet, tune and eve Last time we upgraded the Exhaust, Today we add a high performance carburetor and upgraded CDI. Look at the engine and spot the round or cone-shaped air filter. 5mm bore appropriate for the HP carb. One of the most asked questions that I have seen is HOW someone would go about tuning the carburetor, picking out one, and getting your engine running in tip-top shape. How To Make your Hp Carburetor Run Better than stock! - YouTube. 5 hp may not work for one that was for 10 hp (carb to intake bolt to bolt distance and jetting) so with this listings it's pretty vague. motorized bikemotorized bicyclemotorized bike reviewhow to bu Apr 6, 2020 · Because carburetors have a number of overlapping systems, each with its own adjustment range, tuning them to give the desired mixture over the engine’s operating rpm is a step-by-step process. com/watch?v=GxmZ48nXuUo&t=174s* VISUALLY EXPLAINED Carburetors with a single adjuster for high RP How to start a motorized bicycle; Motorized bicycle clutch adjustment; Motorized Bicycle – The Grand Tour; Rat bike motorized bicycles and rat rod bicycles; Drift Trikes – The best way to get Sideways; Banana seat bikes – Simply game changing! 2 Stroke Motorized Bicycle Tuning Center. But how can you be sure which is the best one for your engine kit? There’s a carburetor for every need, whether you’re running a motorized bicycle with a 2-stroke eng New carb design; Improved magneto; High end allen bolts; This bike engine kit has all of the necessary items to turn your pedal bicycle into a motorized monster! Supply is very limited, so get yours while they last. 2 Stroke Motorized Bicycle Tuning Center HP Carburetors High Performance, or HP carburetors, are designed for those who seek to push their motorized bicycles to the limit. By following along in the video you Oct 28, 2009 · Also see srdavo's NT Carburetor Assembly Pics for a bit more info. dangerous for the rider. ly/3lzOt8ICarb - https://bit. Mikuni. !! Nov 25, 2006 · How do I adjust the idle. 99 $ 28 . of main jet on my carb to go leaner solder shut and drill smaller my suggestion is one size at a time ( what affects wide open throttle is main jet dia. The only adjustment screw that my carb has is the idle screw. if you bend the tab away from the float body it will give you less fuel in the bowl . Dellorto Tuning Guide 2 655 KB . 75 HP. I have two questions. 2. Pull your spark plug and look at the tip. May 12, 2020 · Trick to these carbs is loosing the neck provided on the top of the carb, I used the one from the NT, getting as much slack out of the cable as you can by adjusting BOTH ends of adjustment, i. It bogs down big time with not much throttle and when I'm on a slight incline, well let's just say I stayed close to home and thank god for the pedals. I’d love to see a 212cc predator engine on one of these Phatmoto bikes instead of that 79cc Lifan engine. Throttle control & cut-out switch with leads and left side handle bar grip. At the trottle grip or at the Carb. Follow the tips in this video to be on your way to being a jetting pro! Now this video shows a generalized procedure for adjusting the idle speed air/fuel mixture. It is sometimes referred to as the RT. 🌟 Dec 24, 2023 · Choosing The Right Carburetor For Your Motorized Bike. If you fully unscrew this screw and take it on your hand, you will see a needle like tip. The one with the spring on it. Hand control choke adjust lever that mounts on the handle bars and cone air filter makes this the carb of choice. Jan 29, 2007 · You have the same carb I do, and I know how to adjust it. Once you get the bike running you can set your idle speed to whatever you want it at. Mechanical carburetors: Slide carburettor: Adjustment of the mixture flow cross section through slide and needle nozzle system. If your airscrew is on airbox side of carb, turning out will lean mixture. Features: 78 mm tapered shaft; Stock muffler and carb Jan 23, 2018 · BH-Motor New Bike Engine Red Carburetor for 2 Stroke 49cc 50cc 60cc 66cc 80cc Bicycle Motorized Engine Kit 4. Jun 9, 2009 · The main reason for this was that the upper end of the intake manifold shipped with my carb had the 10. The guide includes information on essential 2 stroke engine performance upgrades and system interaction. Finding the right carburetor for your motorized bike engine can be tricky. 99 Replacement standard carburetor for the Phantom 85 2-stroke engine kits. ly/ 3 days ago · Before commencing the carburetor adjustment, ensure you have the essential tools at hand. As a technician, it is unlawful to re-calibrate or replace a fuel nozzle or jet (bowl nut) with a part from any other carburetor that was not originally designed for that engine. But you want more, don't you? So click on the Carburetor to learn more then you will ever want to know about the inner workings of Carburetors. So now I’m just waiting on parts. This CNS Carburetor with Low Profile Cone-Style Air Filter is just what your 2-stroke motorized bicycle needs for that boost of power and speed you’ve been looking for. My question is, how do you tune the carburetor? I searched on the forums and have found some very helpful posts, however I'm still a little foggy on some things. ZTMoto Phantom 85 Carburetor - 85cc 2-Stroke Motorized Bicycle / Bike Engine Carb $24. © Jan 10, 2009 · I'm new to motor biking and I just assembled my first motor bike to get me around campus. From Pianoman's description, it sounds like he has the same carb I do. This is why the motor and fuel tank mounts are designed as they are. Brief Description Of Operation The NT side-draught carburetor operates by drawing air into the air inlet past the slide needle jet. com is the leading importer and authorized distributor of authentic JL Zeda 2 stroke motorized bicycle engine kits in the United States. The throttle assembly adjustment screw conducts the idle adjustment. For more information about motorized bicycles visit us at http:/www. Keihin. The CNS High Performance carburetor might prove to be a little trickier to tune and require more finesse. Step 1: Locate the Carburetor Do you have a stock motorized 2 stroke bicycle engine that you are ready to take to the next level? Greatly enhance your existing bike motor with this performance Dio upgrade kit. These carburetors are engineered to provide an enhanced air and fuel mixture, resulting in a significant boost in engine performance. com's Technician, Jonny explains how to adjust and tune your 66cc, 80cc, or 48cc bicycle engine NT carbu How to start a motorized bicycle; Motorized bicycle clutch adjustment; Motorized Bicycle – The Grand Tour; Rat bike motorized bicycles and rat rod bicycles; Drift Trikes – The best way to get Sideways; Banana seat bikes – Simply game changing! 2 Stroke Motorized Bicycle Tuning Center. Remove the metal plate that houses the slide and jet needle attached to the carburetor. On the HuaSheng motor the idle mixture screw is a fuel adjustment, not an air adjustment. 5. bikeberry. 5mm bore suitable for the stock carb, not the 12. Additionally, consider acquiring a carburetor cleaner spray for a thorough carburetor cleaning before making adjustments. 4. Adjusting from 1/4 to 3/4 throttle range. All speed adjustments must remain within the limits that are specified for each engine and are not to exceed the maximum. INITIAL ADJUSTMENTS: To start a cold engine, first carefully close, by turning clockwise, both idle and main adjustment screws. Place washers and nuts on the bolts and tighten them so the I have an eBay kit “100cc” 2 stroke (more likely to be 66 to 80cc) and it wont idle. 0 out of 5 stars 5 Tuning the Carburetor. My bike rides like it's choked a little bit and won't get above 22 or so (maxes around 30). We show you how to install a throttle on a High Performance Carburetor. Mar 10, 2025 · Locate the carburetor by finding the engine’s air filter. Specs: Jet 80cc 2 Stroke Bicycle Motor -Jet 80cc 2 Stroke Bicycle Engine Kit GRUBEE SkyHawk GT5 66cc/80cc Slant Head Bike Motor Kit (Standard Finish) Standard Finish 2. If airscrew is on engine side of carb, it will richen it. We have 4 main categories of bicycle motor kits: 48cc 2-Stroke, 80cc 2-stroke Kits, and 4 Stroke kits. i barely touched the throttle when starting it, just that tiny stroke to get the engine running. Matt holds a bachelors in Mechanical Engineering. i w. Get ready to leave people behind in a cloud of dust! The BBR Tuning V2 100cc Motorized Bicycle Engine Kit is an upgraded version of the BBR Tuning 100cc Motorized Bicycle Engine Kit and is now one of the most powerful 2-Stroke motorized bicycle engines out there, outperforming even the most supped-up 66/80cc motors in torque and top-end speed. Bicycle motor & mounting clamps We offer the largest catalog of motors for bicycles in the world. I’ve tried the throttle adjustment screws on both the carburetor and throttle side but it still doesn’t want to idle. I took the intake filter off and it rides beautifully without the filter. Oct 12, 2011 · There are also a lot of features on this carburetor like the limiter cap allows high altitude adjustment, air mixture screw (after 1985) that’s factory set to 1 ½ turns out. http://www. With . , throttle and carb end, and then adjusting idle screw AND cable to get proper idle, and if running rich, just add less oil-to-gas than you are without Oct 27, 2011 · im going to guess you have a carb like this one Disassembly of Briggs and Stratton Medium Two-Piece Flo-jet Carburetor on the float there it a little tab that pushes on the needle its on the bracket where the pin holding the float to the body is . Sep 13, 2015 · The carb from a 3. Back the air screw out to lean the mixture. Many people Nov 30, 2020 · Reinstall the NT carburetor on the bicycle engine and take the bike for a test run. ly/1FjIZopYou'll need a flat-head screwdriver, Philli Jun 18, 2024 · As a product manager at JFG RACING and a passionate mini bike rider, Ray shares expert insights on understanding, adjusting, and optimizing mini bike carburetors. D. Explore the NT, HP, OKO Carburetor Overview from BikeBerry. Feb 16, 2021 · This is part one of a short series of videos covering my experience with the so-called "High Performance" or "HP" carburettor for my 2 stroke motorised bike. The jet on your motorized bicycle engine determines whether your engin At approximately 2. Especially for motorized bikes, its one thing to build an engine, but its a WHOLE different rodeo for tuning one. If the make of your carb is Mikuni (Pulsar, Yamaha, Fiero) the fuel/air screw probably will be of brass (golden colour). Tony shares what he learned from our great Facebook community group about setting up our NT carburetor and clutch on your motorized bicycle properly the firs Who doesn’t love flying on a bike? With a motorized bicycle carburetor adjustment, from a 49cc to 80cc carburetor adjustment, you can fly with ease. May 5, 2014 · I imagine that the unmodified GXH50 engine running in an application that it was designed for (water pump, cement mixer) might be alright with that narrow range of adjustment. The carburetor is the part of the engine that the air filter is attached to. Open main adjustment screw counterclockwise approximately one and one quarter ( 1 1/4) turns. ). Make regular oil changes and your engine will last you for many years to come. 99 Get it as soon as Saturday, Apr 12 In this video, I'm going to show you how to use, and tune a Chainsaw/Pumper carburetor on motorized bicycle engines. A little helpful tip is that the yd100 bottom end li hello :) after repairing some stuff on my bike and when i went to try, it started but like it was full throttle. Today I was not having an issue with the bogging at full throttle, but I was having a hard time keeping the engine idling when coming to a stop or slowing down. 72mm fuel jets (larger than the stock NT carburetor that comes with most bike engine kits), more fuel and air are able to enter the carburetor, resulting in higher speeds. 'Venturi' action draws fuel from the float bowl upwards into the in-going airstream. com for motorized bike parts and accessories! In this video, you'll find an overview of the differ Jun 7, 2009 · Cns carburetor adjustment/screws?? Hi, I'm having some issues with my CNS Carb. Keeping the carburetor clean, adjusting the fuel mixture, and inspecting the throttle mechanism can help ensure optimal performance and prevent any problems while riding. Jan 20, 2015 · a quick overview of how I set up my motorized bike carb the first time I go to start the engine. If a frame with larger tubing is used, the motor mount and gas tank mount may need to be modified. Jul 13, 2009 · Fuel screw is located on the carb but its near the engine. Apr 13, 2019 · Hello, i recently buyed a new HP carburetor. 2-Stroke Engines . That’s why we asked expert 2-stroke and 4-stroke motorized bike riders what they’re running on their motorized bikes. This power translates into a huge increase in torque and acceleration and resulting in an overall better performing engine. This has a clip on the end of it. Turn the air screw in to richen the mixture. If the bike bogs for a second before responding to throttle, lower the clip (raising the needle) a notch at a time until the engine picks up smoothly. i changed the intake manifold and CNS Racing carburetor is a must for the motorized bicycle enthusiast. S. I am Sep 17, 2022 · Join me on a quest to decide if the controversial HP carb really cuts it next to the old standby NT carb. Carburetor and air filter. Adjust the idle speed screw to obtain required idle speed (between 1200 & 1500 RPM). Here are some Carb Manuals that might help. It is a howel motor 48cc or 50 or whatever. 38mm (pre-installed), 0. I know Dec 8, 2023 · It is important to regularly check and maintain the carburetor on a motorized bicycle to prevent these common issues. We show how to adjust your carburetor to spec and what tools you will need. Fuel Tank. intake for Mikuni VM18 carburetor Fully tuned/rejetted Mikuni VM18 Carburetor (65 main jet, 25 pilot jet) UNI High-flow 2 stage air filter Custom-fit Genuine MZ65 Expansion Pipe (Painted orange with exhaust paint) Dirt bike muffler added to expansion pipe Upgraded and port-matched exhaust and intake gaskets Aug 26, 2010 · I just replaced m yspark plug and changed from 25:1 and 32:1. rqnn rgq fmwf yulqii rswp tnk dza mkar vpxea bqclg tkco sdsyfg pdr shd qevhk