Hi I've had my ty 250r mono for a while now and has Been a very capable machine for my needs . The only problem I have is the mono shock spring unit is to soft and it bottoms out and the chain grinds . It's on the max setting for rebound   . I'm 17 st so might be the fact I'm riding it or may need a replacement?  At 360 quid for a new one any ideas welcome cheers stu

New shock is the best way to go with a spring for your weight.  Rockshock, Falcon, Ohlins, and others  do a version

Edited December 4, 20196 yr by mattylad

Or weld on some twin shocks for half the price and upset a few?

Huge difference with twin shocks vs the mono ride wise. Why not just make a spacer to preload the spring?

I've been reliably informed there not made to come apart? . 'll tell  the kids tonight xmas is cancelled  dads got a boxing day trial and needs a new shock ??

 The shock is not readily rebuildable, they were too soft stock. You did not say it was blown!

No not blown but its just not up to having me on its back. .At least I know now they were built for lighter riders than me   . Got me old bultaco that's keen to get out and play so not the end of the world till I get a replacement for it ?. 

2 hours ago, rusty nuts said:

Or weld on some twin shocks for half the price and upset a few?

You could just weld it solid and make it into a real trials bike...?

? not sure I'm ready for pre 45  just yet .life's hard enough with out giving up on the suspension. ?

So back to the spacer on the spring. I will probably do the same on an '84  I recently aquired.

3 hours ago, lineaway said:

So back to the spacer on the spring. I will probably do the same on an '84  I recently aquired

Don't think this will work, doesn't change the spring rate, but will become coil bound.

5 hours ago, rusty nuts said:

? not sure I'm ready for pre 45  just yet .life's hard enough with out giving up on the suspension. ?

This rear suspension thing is just a passing phase, it won't catch on...

The mod we used to do years ago and what I've done to my present Ty is to cut the y shaped bracket that bolts the linkage to the swing arm.

You cut the y bit off a weld in a spacer a few mm thick job sorted.

Also Jonathan Wren motorcycle's services the rear shock..

 

That's a great idea and can see that would work just fine. we talking maybe 5mm or  more ?suposse it's  trial and error pardon the pun.

Need an ohlins on mate with a fat boy spring on makes it 1000 times better had one on my pinky