Wanted standard 1000 rear shock

[wezdavo]

The Gen1thou shock doesn't exactly have a great reputation.

The big problem is the spring, for some strange reason Yamaha gave it a spring that might be ideal if you weigh about 8 or 9 stone, but yeah most of us weigh a bit more.

Not long after I bought mine I had the pre-load turned up to 10, and I'm only just over 12 stone. 

It was OK for 10,000 or so miles but then it gradually turns into a pogo stick.  The damping just gets shot with too much work from the weak spring.

So if you can find one, you'll probably find it's shot.  If you are lucky a wee damper overhaul - ie new seals and a re-gas - it might be OK, plus of course even with the 600 you'll probably need to fit a new spring.

The K-tech upgrade (don't think it's available anymore) cost me the best part of 400 quid, you end up with a top notch shock.  But all I have is a box of bits left over.

Maybe try asking in the thou section - a lot of em don't look at general.

The sag must of been way off with that amount of preload, also increasing preload would of done nothing for the pogo effect...

What settings for compression and rebound were you running?

As you have said the main problem with the thou unit is the 73.6 N/mm (7.5 kg/mm) spring.

The 600 spring is 147 N/mm (14.7 kg/mm)..

I have done the above mod to my 600, the shock I bought was from a thou with 15000 miles on, and the compression and dampening are absolutely fine..

Great cheap mod