Question about 1994 Yamaha FZR 600
Hi, Jay32769 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. Here is how and where you compensate trouble:
1. Your air/fuel mixture ***** manages your idle.
2.. Your slow speed jet manages 0-1/4 throttle opening.
3. Your jet needle c-clip position manages 1/4-3/4 throttle opening.
4. Your main jet manages 3/4-wide open throttle.
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, please click on the websites below. Good luck and have nice a day.
How to Diagnose Motorcycle Carburetor Problems
yamaha FZR 600 carburator doing much better
OEM parts for Yamaha
Posted on Apr 01, 2016
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Posted on Jan 02, 2017
Really...strange what you need to do is see if the bike is running too fat. So...warm her up witha fresh set of NGK! spark plugs. After the bike is warm take it down the street and back. When your on the way back get on the throttle and accelerate then shut er down and coast it into the garage. This will give an acuurate read on the spark plugs at operating temperature and under a load. Pull all the plugs. If they are brown like coffee with cream that means carbs are adjusted correctly. If they are black and wet too rich and if they are white or very light brown too lean. Other problems may be oil soaked plugs from loose top end parts. Maybe valves or guides.
Posted on Mar 05, 2009
this sounds like a stator problem. try checking the wiring inside and to the battery and if that is not it you most likely need to replace the stator.
Posted on Jun 14, 2009
SOURCE: 1994 yamaha fzr 600.
i had a similar problem on my 1998 honda superhawk. I was down in Daytona Beach, Florida, and it was really hot and my battery went dead. It turned out that the heat of being down there along with the frequent short trips and idling we were doing down there fried my regulator/rectifier. It actually melted it was so hot. I bought a new regulator rectifier from a guy online who was really cool about it. Rick's Motorsports Electrics was the name of his store.
I looked up the part for you. check it out: http://www.ricksmotorsportelectrics.com/proddetail.php?prod=10-417&pmc=OTRZYW1GWlI2MDA=
Posted on Aug 19, 2009
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