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gp200 forks rebuild

Posted: Mon Feb 22, 2016 12:24 pm
by shamrockexpress
Re-building set of gp200 forks the top rubber fibre washer ( part that is up either fork leg for which spring and rod sit into)
can I replace the top washer/rod holder with the series 3 top hat white nylon one its just I have a new set?
Next question the springs I bought a while ago think they might be progressive they are tightly coiled at one end and more spaced at the other!!!! I am guessing the tightly coiled end goes up onto the top hat end???
any info appreciated.

Re: gp200 forks rebuild

Posted: Mon Feb 22, 2016 12:30 pm
by fishi
Tightly colied goes up

Re: gp200 forks rebuild

Posted: Mon Feb 22, 2016 7:29 pm
by Donnie
It supposedly doesn't matter which way up progressive springs go as long as they both go in the same way. From a personal point of view I prefer to put the tighter windings uppermost.

Re: gp200 forks rebuild

Posted: Mon Feb 22, 2016 7:47 pm
by hendy
Doesn't even matter if they're opposite ways.

It's to do with unsprung mass; which in this case is considered as inertia. The less unsprung mass you have, the faster your suspension can react to the conditions. That said, we're not exactly riding race bikes so it's very marginal. We buy springs and dampers without questioning their properties in any really scientific way, so why unsprung mass suddenly becomes critical is beyond me.

Incoming.....

Re: gp200 forks rebuild

Posted: Mon Feb 22, 2016 8:21 pm
by hendy
But yes, I'd put them in with the tight coils at the top

:lol:

Re: gp200 forks rebuild

Posted: Mon Feb 22, 2016 8:29 pm
by shamrockexpress
hendy wrote:But yes, I'd put them in with the tight coils at the top

:lol:
WILL DO, many thanx..........

More importantly will the white nylon tophats do or do i need GP flater ones???

Re: gp200 forks rebuild

Posted: Tue Feb 23, 2016 6:40 pm
by wack 63
The white nylon ones around 8-10 mm thick are the correct ones.

Re: gp200 forks rebuild

Posted: Tue Feb 23, 2016 8:09 pm
by Daggs
I would have thought any type of spring stop (matching pair) would do. That part of the forks is identical to any series three.

Re: gp200 forks rebuild

Posted: Tue Feb 23, 2016 10:20 pm
by rainbowrunner
I bought a pair of MB springs for my special and i had to use the GP nylon polo type bushes as the springs would.nt fit my top hat bushes, (springs were a tad thicker) so depends what springs you use.

Re: gp200 forks rebuild

Posted: Tue Feb 23, 2016 11:27 pm
by shamrockexpress
Thanx for all the answers all taken on board,,,,,,,,,,,,,,,,,,i just ordered the proper nylon gp ones to be sure, i think the tophats i have would have done but i,m trying my best to stop doing every job 3or4 times over :D :D