Hi I have a 1992 fzr600. Bought as a none runner. Was told starter gone, when I got it home I found out that the starter clutch gear had teeth missing and one coil lead was damaged. Replaced both items with new parts(second hand). I also cleaned the carbs before starting. Got bike started but was only running on no 1 and 2 clylinders. The carbs for clyinders 3 and 4 seemed to be running off. Also alot of smoke coming from exhaust but i think this was due to too much fuel. I let it run for about 10min. Turned off the choke and the smoke started to go away. I gave the bike a rev and she just cut out. It blew the main fuse and the ignition fuse. I replaced the fuses but now it won't spark at all. When I turn the bike over for a few seconds and them turn off the key it sends a spark to the pug and back fires. Also only one off the coils 12v supply is cut off when I use the run/off switch. Possibly a short or bad earth?

SOURCE: Trouble starting my 2003 TTR 225

how old is the gas it may have a lot of water or junk in it.drain the bowl on the carb and drain the fuel out of the tank, check the petcock screen inside the gas tank. also i would not spray start fluid into the plug hole, it could blow a hole in the top of your piston,spray a little right into your air cleaner or carb.good luck

SOURCE: 1995 yzf 750 wiring diagram, starts wont rev

Hi and welcome to FixYa,

Would the wiring of a 95 YZF750 R/SP European model help?

Good luck and thank you for asking FixYa.

Testimonial: "the blue yellow black wires i was looking for appear to be for tps unit whitch is missing thanks this gets me going in correct direction "

SOURCE: just had my carbs refurbished bike starts on choke

It sounds like it is running too lean for some reason. First, let's assume that the normal tune up items are correct (valve tappet clearances, spark plugs are good, air filter, etc.). Also included in this assumption is that the engine has good compression (at least 140 psi on all cylinders) and that there are no air leaks between the carbs and the engine.
The aftermarket exhaust will generally require larger jetting in the carburetors - especially when combined with anything but the stock air cleaner box assembly. So, right off the bat, plan on going up to the next size larger pilot and main jets for the exhaust alone - PLUS another two to three sizes bigger if you aren't using the stock air cleaner box.
Finally, make sure the carbs that you have refitted to your bike are not clogged up from sitting with gasoline in them. It only takes a few months for the fuel to evaporate and leave behind a varnish that will require the carbs to be disassembled and cleaned.

mark woodring

• 498 Answers
• Posted on Mar 21, 2010

SOURCE: starts and runs with choke on for about 1minute or

Sea foam isn't always the answer there is far better things to use, berryman B12 chemtool is the best i have found for thing that haven't been sitting for a awhile but just need a good clean or water problems.
On to the problem at hand, has your bike sat for any amount of time? if so you need to clean your carbs. the gas will varnish and block the jet. will the bike run without the choke? Check your coilby seeing if you have spark test each hole if you have good spark them you know that coils and pickup are working.
Let me know what you find, Good luck
Mark
C.C. Motorsports

SOURCE: PLEASE HELP PLEASE HELP....1992 YAMAHA FZR 600,

Check the spark timing.

Check fuel delivery. If it consistently runs on starter fluid then dies when that is exhausted, suspect a vacuum leak in the carburetor or intake manifold. This will keep the engine from sucking in fuel.