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

Not sure but it explains my fuelling problem, mine had 145 main jet in, was told standard was 137 replace with 140, so thought someone had put a 145 in and it was massively overfuelling, must still be weak, going to get a 147.5 and try that!

I've just put some petrol in mine and it works out to 70mpg on the road sometimes 2up.

That's 245 tank range then. I think it's the most economical vehical I've ever owned.

oldmickyboy wrote:

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33 bhp ? seems very optimistic to me i would say more like 20 bhp ?
i'm new to ttrs and own a 2003 which i bought from a trf member in chesterfield and was told that it was " uncorked "
having checked it the snorkel has been removed a sports silencer fitted and the pipe cut back to get rid of the restricter and also
i was told it was jetted to suit which when looking at the plug it seems fine but know way does it feel like 30 bhp
but one thing ive noticed is after i swopped a ride with my mate and his serrow 225 is how much his bike was more willing to rev
compared to mine, its only done 3000 miles is it still a bit tight or is this normal ? when out on the road i seem to have just a little bit more power and torque but his serrow is standard
sorry for throwing this at you guys lol but any info would be welcome
best regards mick

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I am guessing the 33bhp was measured at the engine rather than the rear wheel.

The TTR engine gets "stronger" the more miles you put on it but it should rev freely at 3,000 miles. If you have done the usual service checks (clean air filter, plug, valve clearances set correctly, etc), I can't think what else to suggest unless its something really odd or unusual like a partially blocked silencer 

Brian

That seat height of "875mm" is definitely wrong...I've noticed many times that bike specs are wrongly reported on the net ,so its worth cross-checking... The actual Yamaha site says the seat height is in fact "910mm"....Thats a big difference....I have seen "895" listed elsewhere as possibly the lowest seat height setting. I have 2 TTR's and one is shorter than the other..Hard to measure precisely ,but i rate them at "890-900" and "930-950". Maybe its the rear pre-load thingy has been adjusted ,and slightly taller Dunlop 605's on the taller bike ? Then again i have not been able to find any info about the difference between a "RAID" bike and an "OE" one....Can someone "Please Explain" ?? The other discrepancy i noticed was the "16 litre" fuel capacity....Mine takes 10 or maybe 10.5 litres. I don't get it...Am i missing something here ?? Correct me if i'm wrong ,cos i don't mind getting to know the topic from those that know better.