Yamaha TRX850 Enthusiasts Forum

left hand side fork seals have gone, should I replace just the one side or have them re sprung to suit my wieght 100kg since they are apart I think the standard ones feel fine except for them bottoming out on the odd pothole which I think bust the seal in the first place. I have them out waiting on yer advice I am heading to scotland in two weeks on it so I need it sorted

Will you get new springs delivered and fitted in 2 weeks?

If you're happy with what you've got just replace the seals. You can always put new springs in later.

You could just fit new seals but they will only blow again

Give Hagon a ring - £60 will get you a set of progressive forks delivered (and usually next day)

thanks for the replys, has anyone tried the ohlins springs I put progressives on my xjr and was not very impressed, the bike behaved like a jack hammer on bumpy roads not much better than standard if any I think your right though phuk that it will just happen again if I dont put a heavier spring in the rear seems fine

trixynut has Ohlins springs

Ohlins or otherwise - any stiffer springs will be a worthwhile investment

What about a set of twin lip seals and a little more oil in each leg??

AFAIK fork seals in good condition shouldn't pop as a result of 'normal' fork travel, and should still be able to contain the applied pressure of full stroke compression without leaking, so it's my guess that the original seals are/were just at their point of end-of-life failure and needed replacing anyway.

Basics says for a start don't replace just one seal cos the other one is certain to go as well - here's what I'd do ... Strip the forks down, replace BOTH seals, check all the bushings while you're there, make sure that the springs are still within service lengths, refill with the right volume and weight of oil, then set them to the 'average' in the manual. Go for a ride and see what difference that's made. If the forks still bottom out, then up the pre-load, and if that doesn't work then whip the fork nuts off (don't forget to support the bike's weight!) and stick a little more oil in each leg not forgetting to wind the pre-load back!. So far all this has cost you is a tenner for the seals and a litre of oil. An extra 30-50cc of oil isn't going to blow the seals any more quickly, but it will provide a little more spring effect from the reduced air volume in the fork. If after all this you're still not happy and feel that progressives are the way to go, at least you know that the forks are in A1 condition and all you have to do is install the springs - after extracting the extra oil of course lol.. I'm sure there's a link somewhere to the TRX book of words, but if your stuck for the specs let me know and I'll hook them off my work PC...

On the other hand you could always install an R1 front end...

Greg

Cheesie,

As Martin said, I've got ohlins springs in and they make the front end a whole load better.

They're not progressive, but about 15% stiffer than standard, and longer (they fit without the top spacers the standard ones have).

Cost was about £70 but delivery througn M&P parts took several weeks.

Dave.

left them in with pro link racing today, quoted me £150 respring oil seal and give the stanchans a bit of a clean, springs arrive from sweden next monday, hopfully

got my forks back today think he said the newton rating was 8.5 or somthing like that crash bungs also came last thursday I will let you know how I get on with them he said the springs came longer than the standard ones with different spacers he also rekon,d they,re a hell of a lot stiffer than standard hope there not to stiff

I've got Ohlins springs. Had them for about 3 years. didn't notice much difference at first, but as they've aged they've got better. Worthwhile investment, and as said get them weighted to suit.

Bob

just back from scotland and apart from just clipping a sheep on the A 713 had a great time, you are right about the forks I did,nt notice they were that much stiffer the next big test will be the Northern Irish b roads which are crap and full of holes, got to show a clean pair of heels to my xjr 1300 buddys who thought there was no fun with a sub 100bhp bike