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June 29th, 2009, 12:03 AM   #11
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Joined: Jan 2007
From: Bundaberg. QLD.Australia

Posts: 438
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I Ride:
Sorry for delay in getting this post up, just been slack..

Pulled the forks apart again & re-did the preload on the bench as per the doc. I had been running 6mm of preload on the adjusters thinking this wasn't much. To my surprise, there was 13mm of preload spacers so with the 6mm I had wound on a massive 19mm in total. I've removed all the spacers & when I re-assembled them, there is another 3mm once the cap is wound onto the piston rod. 2 turns now on the adjusters so 5mm preload in total. This has made the forks travel much further through the stroke than before & gotten rid of all the arm jarring coming through the bars on the road.

Re-valved BV & MV, before & after as detailed below;

Before;
BV-24, 16, 24,24,24,24,24,22,22,20,18,16,14,12,10,18
MV-24,24,24,24,22,20,18,18,11
RB-24D,24D,24D,24D,24D,24D,20/16,20,20,20,10,10,16

After;
BV- 24,24,16,24,24,24.22.20,18,16,14,12,10,18
MV-24,24,24,22,20,18,11
RB-24D,24D,24D,24D,20/16,20,20,20,10,10,16

I'm now getting at least half fork travel under brakes & a much plusher ride over the bumps. Forks were so tightly valved that the bars would almost fly out of your hands over the smallest of bumps on the track. I've go no compression wound on the clickers & still slightly hard, deflecting slightly but MAJOR improvement in bikes handling & my lap times. Actually passed 4 other guys last ride so somethings working.

Rear had 4 turns of preload wound off the spring to make it sag more. No rebound at all on the clickers & still needs some wound off but not going to pull it apart just yet. 1/2 turn on the slow speed compression & 1 turn on the high speed.

Conclusion; these bikes are setup way too hard for normal use. Might be ok if racing on bitumen but I race on a dirt track covered in oil & rolled. Heaps of holes & loose dirt on the track making it bumpy most of the way around, especially coming into the corners.

Gunna take a 24 out of the BV next rebuild if not 2 to try & get back into the clickers. Way smoother to ride on the road as well. Very happy with the changes I've made & might actually try 2.5 weight oil before I re-valve it again to see if that's all it needs.

Thanks to Spanner & Simon for the input. If you've got a proper FS berg & ride it on the road, try the valving & you'll enjoy your rides a bit more & not feel like you're fighting the bike the whole time.

Cheers,

Wal
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