Question about Motorcycles
My Yamaha 1992 Wave runner lll will start easy and run ok until you give the gass. I changed the inline fuel filter, plugs, carb filter and diaframs but it dies under a load. Will immediately start back up and run at low rpms. On my lift, I can run it up to high rpms for about 30 seconds and then it sounds like it runs out of gas.
An engine that dies under load but starts ok and idles ok has a fuel blockage in the main jet . Possible from water in the fuel in the carby. Water will not pass through the jet and blocks up the hole A trick that is used is to place a pint of metholated spirits in with the fuel. It breaks down the surface tension of the water and allows it to pass through the jet.
Posted on Jul 29, 2013
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Posted on Jan 02, 2017
SOURCE: No Power at High RPM
Sounds like a fuel problem, possible stuck needle valve. Did you check for vacuum leaks? How about the fuel itself, did you treat it before storage to prevent gelling and varnish ? If not your entire fuel system may be restricted. Purchase a can of Seafoam...pour in 1/2 of it to a tank of gas, use the other 1/2 on the next tank. Change fuel filter afterwards because any foreign materials will be in the filter from the cleaning process. Third tank normal fill.
Good luck...i hope this helps.
Posted on May 19, 2009
I have a tw200 and when I have this problem its from the cam chain slipping back a notch when I unload it from my truck. I leave it in gear so when I let off the cluch it acts as a brake. I ride by my self so thats why I load it that way. I am guessing you load and unload your tw the same way. So remove the timing cover and make sure you are tdc on both the upper and lower timing marks. The bike will run if the timming is off a bit. It's really easy to set the timing on these bikes. It's easier to look for how to on the xt 200 if you need more help.
Posted on Jan 07, 2010
I have the same bike and same problem. Check the intake hose that connects the carb to the motor it may have a crack mine did and lost power when the bike warmed up. They don't make a replacement hose for it so I am using a rubber plumbers coupling with hose clamps. Might work? The hose is inch and a half diameter and about three inches long try that maybe. Good luck If it makes a chirping sound when the bike gets warm it's probably that hose sucking in air and screwingup your mixture.
Posted on May 06, 2010
i had the same issue. it's gonna be a blockage in one of the vent tubes to the carb. check the line to the left of the carb that runs next to the gas tank. if thats fine then check the gas cap line. then if thats all good then check the line that runs below the carb. these are all vent tubes and allow the carb. to refill with fuel
Posted on Aug 07, 2010
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