Yamaha TRX850 Enthusiasts Forum

Need help bike is hard to start gets red hot within 3mins At idle it stops hold the throttle at 2000 revs and it slowly revs up to 4k then drops down to 1k then goes back up again was going perfect before this Things I have done dumped the oil as I forgot to turn fuel off yes fuel in oil put two lots of new oil in since to make sure all fuel is out. have had the carbies of and apart twice all seems fine in them screws are out the recommended 2 turns new plugs had them out 2 times totally blacked with carbon after just 3 mins running both times things I am going to do throw a lit match lit match into fuel tank or attack bike with an axe

did you check the float level?

Also try 1.5 turns out on the first screws,

Check the choke is not sticking open

Inspect the inlet rubbers

Hi al22!

Maybe checking the valve clearances might also help - as surely would the use of punctuation in your text (i.e. for improved readability, not for improved running of your TRX) ...

Proposing greets from Munich!

well put Holer......