A forum for owners of Yamaha TTR250 trail and enduro bikes!

dannydandan · Member

bike start after a long while then cut out

TTRfan · Super Guru

If you undo the float drain screw do you get a constant flow of fuel out?

If so, it sounds like the common problem of a slightly blocked pilot jet.

Some tips here

Brian

dannydandan · Member

hi i havent tryed this but will shortly cheers

dannydandan · Member

just gave it a try and screw is badly rounded so cant turn so i think tommoro i shall try again bikes sounded a milion times better to when i previously tryed before i got new parts so will keep trying

peteBLUEttr · Super Guru

Maybe you didn't clean the pilot jet quite enough, soak it in some solvent for a good long time and blow through with compressed air if you can, or you could just replace it, they don't cost too much

dannydandan · Member

will try again tommoro if that fails then ill order a new pilot jet it has improved quite alot from a few months ago when i first started bike if all fails tomoro ill take carb off again be intresting too see inside now as i completely drained all fuel from tank and put new in thanks for reply :)

TTRfan · Super Guru

dannydandan wrote:
just gave it a try and screw is badly rounded so cant turn so i think tommoro i shall try again bikes sounded a milion times better to when i previously tryed before i got new parts so will keep trying

This thread may help wink

dannydandan · Member

yes cheers i shall have another look at the screw tomoro as was a going a little dark :) might have a flat head that can get a grip hopefully

dannydandan · Member

found a thread on here says too check accelarator pump nozzle so i shall try and see if this squirts fuel in the morning and if need be give it a good clean and re clean jets why im at it :)