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

Richard · Member

Rattle

barra8 · Guru

Hey Richard,

Question:

Is it in your top end?

..................................................

If it is it can be either.

Timing chain.

Or ring rattle

.......................................................

Question: Did you run it in properly before exceeding 3500 rpm?

..................................................................................................

Jarrah.

Richard · Member

There is no taco so no idea how far i rev it but i didnt rev it hard at all tho i was taking it easy. I can be doing 40km/h back of the throttle and it rattles. when im on the throttle it doesnt rattle

barra8 · Guru

The above is the possibilities of trouble

If you exceeded 3500rpm for a prolonged period it could be the above

...................................................................................................................

Service and warranty

.........................................................................................................................................

Engine Break-in 1,000-1,600 km (600-1000 mi)

There is never a more important period Avoid prolonged operation above 1/2 throttle.

in the life of your engine than the period ..............................................................

between 0- 1,600km (1000mi). For Notice:

this reason,you should read the following If any engine trouble should occur during the

material carefully. break in period,immediately have a YAMAHA

Since the engine is brand new,do not dealer check the vehicle.

put an excessive load on it for the first

1,600km (1000mi). The various parts in

the engine wear and polish themselves

to the correct operating clearances.

During this period,prolonged full-throttle

operation or any condition that may result

in engine overheating must be avoided.

0-1000km (0-600mi)

Aviod prolonged operation above 1/3 throttle.

Notice:After 1000km (0-600mi) , of operation

the engine oil must be changed, and the oil filter

element cleaned.

.............................................................................................................................................................

Jarrah.

damn_oatesy · Member

I had the exact same problem with mine.
Started about 400ks even though I tried to wear it in as per instructions, a quick visit to the dealer had that chain tightened in 10 minutes.

Haggis Hunter · Veteran Member

I had a rattle just like this when I shut the throttle off. It was the chain hitting the roller, the one just above the swinging arm pivot.

Nice and simple

Peter

Richard · Member

Yeh i definately haven't over reved it. It has 40km on the clock and i have been driving it slow and steady. Having a big car background I have a good understanding of breaking in a new engine as ive had to do it. either that or the 13km the dealer put on it at the start was over reving. its on a 12month warranty so i could get it checked out easily. Sounds just like a loose chain hitting something too. ill check that out

Richard · Member

Turns out the chain was lose