04-11-25, 02:43 AM
(This post was last modified: 04-11-25, 02:49 AM by SmuttyHutty.
Edit Reason: Added info
)
I've bought some Race Tech fork springs for my 2009 FZ6 S2 and am aware that the set comes with a length of spacer that needs cutting to size. I'm told that the Race Tech springs are shorter than the standard springs although as I've not disassembled the forks I can't confirm this.
Is anyone aware of the process of ensuring the correct spacer size is obtained?
In addition the fork oil is to be replaced. Do I use the specified 467ml of oil?
All advice and guidance is gratefully received.
For anyone interested the spring kit is code FRSP-S3732095 and the springs are 36.7x34.5x315 and 0.95kg
There's plenty of videos online showing how to set the rider sag, so when I replaced the OEM fork springs with the Hyperpro ones, I needed to adjust the preload as the spacers are set up for an "average" rider who's probably a bit heavier than me!
I got some PVC tubing and cut it to be shorter than the metal spacers, then stacked penny washers on top to get the same length.
I got on the bike and bounced the forks up and down a few times to get it settled, then got a friend to measure the sag whilst I balanced against a wall, after that, I took a washer out and repeated the process until I found the correct length for my weight.
Once I'd got that, I used a pipe cutter to shorten the spacers and it was sorted.
Off hand I forget how I found the correct fork oil height, but, again, I'm sure there's an answer online somewhere!
Took it to my local motorcycle engineer rather than do it myself. The Race Tech kit comes with a length of aluminium spacer so he cut it long and had his colleague play to part of me to get the sag where I wanted it. Had the brake lines replaced with braided as well. Picked the bike up an hour ago and it is lovely, despite the cold, wet day.
There's reduced sag as per my wishes and these springs are much firmer. The front end feels lighter and at legal-ish speeds on country roads it is lovely, even in the wet.
Race Tech website isn't fun to search around but I found the right info for fork oil height with these springs - 130mm for anyone who does the same.
Seems a bit weird spending a sixth of the bike's value on fork springs, fork oil and brake lines, but I love this bike and plan on keeping it so over my years of ownership it isn't much per year if I look at it that way.
