Yamaha TRX850 Enthusiasts Forum

Ive just fit a new oil seal behind the gearbox sprocket ,,easy job ,and the new seal is slightly different from the old one , the four tags on the back are bigger and the inner dimension is smaller on the new one ( shaft size ) by .6mm both are genuine Yamaha parts so we will see if this slows down the rate of oil consumption

steve speed wrote:Ive just fit a new oil seal behind the gearbox sprocket ,,easy job ,and the new seal is slightly different from the old one , the four tags on the back are bigger and the inner dimension is smaller on the new one ( shaft size ) by .6mm both are genuine Yamaha parts so we will see if this slows down the rate of oil consumption

ah so that's the difference - I saw the p/n had change

+1 pics please.

i can only take a pic of the the old one ,,is that any use ???

a picture?

of an oil seal??

have i got it wrong ???,,,,,,,,,,,,,,going to pub

no mate, you haven't!

steve speed wrote:i can only take a pic of the the old one ,,is that any use ???

Of the job itself of cource!! Duh!

oil bet it makes no difference atall atall to oil consumption as i replaced it a couple o' years back too, ya did fit it 'carefully' so as none of the tangs covered those oil ways ???? i have pics somewhere........

I replaced mine too and it made no difference whatsoever.

My local Yamaha dealer was sceptical too.

I don't doubt that it might make a difference (actually I do) , but I'm yet to meet anyone or read anyone's first hand report that it made a difference. I reckon this "oil seal causing the high oil consumption" is another internet propagated myth.

yes i think your right ,,iam not expecting much inprovement but as i said its a start ,,i will be doing the rings, honeing the bore and replaceing the valve stem seals so fingers crossed

Well there you go, you obviously didn't read my report a couple of years ago. My bike uses minimal oil anyway but on the old forum one of the blokes reckoned that if you visually checked your starter motor and found a film of oil on it then chances are your seal is incorrectly fitted. I done that and thats exactly what i found. Checked the old seal when i removed it and yes it was obstructing the oil galleries. New one fitted correctly and my oil consumption dropped from bugger all to 3/5th's of fu*k all.
No oil on my starter motor now except for a bit of chain lube

So it's not a confirmed cure for high oil consumption then is it Kev?

But for under a tenner, and half an hour's work, it could well be wothwhile. Certainly not a waste of time or money.