Question about 1998 Suzuki GSX-R 600

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Acceleration with gsxr 600

I have a 98' gsxr 600 with a dd pipe and the air box is cut. i went up 1 size on the jets but it still wants to jump a lot when i accelerate hard especially in 1st and 2nd

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Did you adjust the mixture when you changed the jet if not do it now fiddle with it till it runs smooth acceleration with gsxr 600 - 11ff035.jpg

Posted on Sep 25, 2009

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What is the pilot jet size of a 1996 gsxr 750


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I have a 2005 trx450r with a full dgaccelerator pipe stge 2 hc, bcs performance valves kandn filter pre charger and air box lid cut like the hrc kits. it has a 50 pilot jet with a 160 main ive tried 150...


Try covering up the holes in the airbox (where it has been cut away) with tape. If it runs better, you know the jet size is too small. Sometimes the jet kits don't go big enough for a modified airbox.

Sep 22, 2013 | 2009 Honda TRX450R Kick Start

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2007 Honda vtx1300r, just intalls new pipes and air cleaner. I install the pipes first and runs nice no problems. But then I install the air cleaner and problem start. The problem is that it choke went I...


Hi, Luis if you have changed your fuel delivery system, air filter size or flow rate, mufflers or exhaust system or a significant change in altitude your carburetors need re-tuning and if your fuel system (gas tank, filters, fuel valve and carburetor) is contaminated with ethanol sludge, varnish, rust, dirt, water etc. or your bike has been sitting for months or years without running these components must be "PROPERLY" cleaned and reassembled "CORRECTLY" before any adjustments can be made. Tuning your carburetor is fairly simple once you understand the basic principals. You engine is a simple airbox sucking air in and blowing it out, it is finely tuned at the factory for maximum performance once you upset that delicate balance by changing air filters, camshafts or exhaust systems your performance may go down the and the engine may run poorly, you need to compensate the air-fuel mixture in the carburetor in order for the engine to run smoothly and at peak performance. If you are running multi carburetors you need to sync them first and make sure your air cleaner element is clean and dry for paper elements or lightly oiled for foam and meshed elements and properly installed. Here is how and where you compensate trouble: "TIP" if your engine "BOGS" your not getting enough fuel.
1. Closed to 1/8 throttle is managed by the air screw and pilot/slow jet.
2. 1/8 to 1/4 throttle is managed by the air-screw, pilot/slow jet, and throttle slide.
3. 1/4 to 1/2 throttle is managed by the throttle slide and jet needle.
4. 1/2 to 3/4 throttle is managed by the jet needle, needle jet, main jet, and air jet.
5. 3/4 to wide open throttle is managed by the main jet and air jet.
6. Wide open throttle is managed by the main jet.
If you are running lean, spark plug electrode color is white, engine runs hot and feels like it is starving for fuel you need to go up on the jet size or move the c-clip down one notch. If you are running rich, spark plug color is black or dark gray, engine runs cool, and bogs down when accelerating you need to go down on jet size or move the c-clip up one notch. When your carburetor is properly tuned for maximum performance your spark plug electrode will be a light tan color like coffee with cream. If you prefer fuel economy over performance you can go down on main jet sizes until a satisfactory level of lower performance is acceptable versus MPH, your spark plug color will be whiter and your engine will run warmer. These tuning adjustments will only make improvements if your intake and exhaust system have no air leaks or sealing issues and the entire electrical system is in proper working order and you have no mechanical issues.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Carburator Theory and Tuning
How Motorcycle Carburetors work and how to tune and clean them Honda VTX1300S Service Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda 2007 VTX1300S Owner Manual

May 27, 2017 | 2007 Honda VTX1300R

1 Answer

1990 Suzuki GSX-R 750 L carburetor tuning


Hi, Phil if you have changed your fuel delivery system, air filter size or flow rate, mufflers or exhaust system or a significant change in altitude your carburetors need re-tuning and if your fuel system (gas tank, filters, fuel valve and carburetor) is contaminated with ethanol sludge, varnish, rust, dirt, water etc. or your bike has been sitting for months or years without running these components must be "PROPERLY" cleaned and reassembled "CORRECTLY" before any adjustments can be made. Tuning your carburetor is fairly simple once you understand the basic principals. You engine is a simple airbox sucking air in and blowing it out, it is finely tuned at the factory for maximum performance once you upset that delicate balance by changing air filters, camshafts or exhaust systems your performance may go down the and the engine may run poorly, you need to compensate the air-fuel mixture in the carburetor in order for the engine to run smoothly and at peak performance. If you are running multi carburetors you need to sync them first and make sure your air cleaner element is clean and dry for paper elements or lightly oiled for foam and meshed elements and properly installed. Here is how and where you compensate trouble: "TIP" if your engine "BOGS" your not getting enough fuel.
1. Closed to 1/8 throttle is managed by the air screw and pilot/slow jet.
2. 1/8 to 1/4 throttle is managed by the air-screw, pilot/slow jet, and throttle slide.
3. 1/4 to 1/2 throttle is managed by the throttle slide and jet needle.
4. 1/2 to 3/4 throttle is managed by the jet needle, needle jet, main jet, and air jet.
5. 3/4 to wide open throttle is managed by the main jet and air jet.
6. Wide open throttle is managed by the main jet.
If you are running lean, spark plug electrode color is white, engine runs hot and feels like it is starving for fuel you need to go up on the jet size or move the c-clip down one notch. If you are running rich, spark plug color is black or dark gray, the engine runs cool, and bogs down when accelerating you need to go down on jet size or move the c-clip up one notch. When your carburetor is properly tuned for maximum performance your spark plug electrode will be a light tan color like coffee with cream. If you prefer fuel economy over performance you can go down on main jet sizes until a satisfactory level of lower performance is acceptable versus MPH, your spark plug color will be whiter and your engine will run warmer. These tuning adjustments will only make improvements if your intake and exhaust system have no air leaks or sealing issues and the entire electrical system is in proper working order and you have no mechanical issues.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Super tune the GSXR 750
Carburator Theory and Tuning
Suzuki GSX R750W 1993 Service Manual
OEM parts for Suzuki
http://mybikemanuals.com/suzuki/suzuki-gsx-owners-manuals

Jun 15, 2017 | 1990 Suzuki GSX-R 750 L

1 Answer

Mileage problem


Hi Patrick, you can start by going to smaller main jets untill you notice poor performance then go up one size, and the usual suspects are:
1. Excessive use of enrichner system.
2. Enrichner valve not seated or leaking
3. Dirty air cleaner element.
4. Restricted fuel tank vent system.
5. High speed riding style.
6. Idle speed improperly adjusted.
7. Loose jets.
8. Float level too high.
9. Plugged or restricted bowl vent.
10. Worn or damaged needle or needle jet.
11. Vacuum piston assembly malfunction.
12. Plugged air jets or passages.
13. Excessive accelerator pump output.
Good luck and have nice day.

May 12, 2012 | Harley Davidson Motorcycles

1 Answer

Ok so my dad has a virago 1100 he drilled out the pipes and it went lean so he took it like three times to have jet kit put in and they couldent get it right so I did it for him and it was piping after...


Hi, Solie_craig if you have changed your fuel delivery system, air filter size or flow rate, mufflers or exhaust system or a significant change in altitude your carburetors need re-tuning and if your fuel system (gas tank, filters, fuel valve, and carburetor) is contaminated with ethanol sludge, varnish, rust, dirt, water etc. or your bike has been sitting for months or years without running these components must be "PROPERLY" cleaned and reassembled "CORRECTLY" before any adjustments can be made. Tuning your carburetor is fairly simple once you understand the basic principals. You engine is a simple airbox sucking air in and blowing it out, it is finely tuned at the factory for maximum performance once you upset that delicate balance by changing air filters, camshafts or exhaust systems your performance may go down the and the engine may run poorly, you need to compensate the air-fuel mixture in the carburetor in order for the engine to run smoothly and at peak performance. If you are running multi carburetors you need to sync them first and make sure your air cleaner element is clean and dry for paper elements or lightly oiled for foam and meshed elements and properly installed. Here is how and where you compensate trouble: "TIP" if your engine "BOGS" your not getting enough fuel.
1. Closed to 1/8 throttle is managed by the air screw and pilot/slow jet.
2. 1/8 to 1/4 throttle is managed by the air-screw, pilot/slow jet, and throttle slide.
3. 1/4 to 1/2 throttle is managed by the throttle slide and jet needle.
4. 1/2 to 3/4 throttle is managed by the jet needle, needle jet, main jet, and air jet.
5. 3/4 to wide open throttle is managed by the main jet and air jet.
6. Wide open throttle is managed by the main jet.
If you are running lean, spark plug electrode color is white, engine runs hot and feels like it is starving for fuel you need to go up on the jet size or move the c-clip down one notch. If you are running rich, spark plug color is black or dark gray, engine runs cool, and bogs down when accelerating you need to go down on jet size or move the c-clip up one notch. When your carburetor is properly tuned for maximum performance your spark plug electrode will be a light tan color like coffee with cream. If you prefer fuel economy over performance you can go down on main jet sizes until a satisfactory level of lower performance is acceptable versus MPH, your spark plug color will be whiter and your engine will run warmer. These tuning adjustments will only make improvements if your intake and exhaust system have no air leaks or sealing issues and the entire electrical system is in proper working order and you have no mechanical issues. For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Carburator Theory and Tuning
Life On 2 Wheels
http://service.tanga-moteurs.ro/data/yamaha_virago_535_700_1100.pdf
OEM parts for Yamaha
Yamaha Virago XV1100L Owner Manual

Mar 19, 2012 | Yamaha Motorcycles

1 Answer

Just bought a 2001 WR 426. Has an FMF pipe, no air box lid. Main is a #165 and pilot is a #42.these are stock jets according to shop manual. My elevation is 2500-3000 Ft. Any ideas on jetting?


Hard to give accurate info with out seeing the bike with jetting but I would suggest take a reading from the fuel air screw if the bike running better with the fuel air screw in carbi at 2.5 turns out or more then definitely increase pilot jet up 1 or 2 sizes if you get the bike to run well between one - two turns out on the fuel air screw that is where your jetting should be
I wouldn't be concerned with main jet at all - it should be fine for wide open throttle unless you feeling power loss when you open it right up
also if you are getting backfire or popping when de accelleration that also hints toward lean pilot so a size or two change in pilot jet would be worth trying

Jan 20, 2011 | 2001 Yamaha WR 426 F

1 Answer

I want to derestric my 2006 aprillia mx does any 1 know what i have to do as regards to exhausts and size of jets etc..


Best thing to do, would be to buy an aftermarket exhaust system, either complete, or just the muffler, a complete one would be better, as the header pipe is usally a bigger diameter. There are many brands to choose from, and varying prices. Put the exhaust on first, then worry about the jetting. Ride it first with the new exhaust, it may not need re jetting, depending on the brand of exhaust, the supplier should have the specs for any re jetting if needed. Mabey one size bigger on the main jet. Also, for extra performance, you need to alter your air box, or air filter system. A bigger exhaust will require more air flow intake to be of any use. Apart from that, it will sound great.

Jun 13, 2010 | 2005 Aprilia MX 125

1 Answer

Same cut off issue at 6-8k rev


Have you put a pipe or a hi-flow air cleaner in it, if so, it needs bigger main jets. Go up in size til bike accelerates to redline, if ya go too big it will be sluggish

Jun 17, 2009 | 1996 Suzuki GSX-R 750 T

1 Answer

Stage 1 jets didnt work


pull the breather cover off and see how it does it sounds like you need more air going in when you go up on jet size it will change the air fuel ratio thus making it lack power or just run absolutely funny

Jan 14, 2009 | 2004 Yamaha V Star Classic

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