View Single Post
  #4  
Old 01-01-2013, 12:34 AM
wence's Avatar
wence wence is offline
Bronze Level Site Supporter
 
Join Date: Nov 2008
Location: Adelaide South Australia
Posts: 1,159
Default

Thanks Jake,
I have spoken with the tuner who did it and also Terry.
They both said that it sounded like the compression and rebound needed to be wound up, which I have now done.
I know the tuner actually rang Terry regarding these forks, hence why I also spoke to Terry( who has been fantastic by the way).
I have been wondering whether he knew how to refill the oil correctly but I am sure he would know.He did service the shock at the same time and gave the bike back with more preload on the shock( not sure how much but guessing 15-20mm),and he had lowered the triples ie, raised the forks through about 5mm( which I have returned to normal.)

The rebound on the forks was played with and the freebleed (11mm?) shim at the base was removed .I now have a little play on the rebound cct instead of it being wound all the way in.
I did adjust the rebound at the last ride as it was bulldusty and sandy and the front was pushing through everywhere.Went in two clicks and increased compression two clicks also which did help a little.Even after all this the front was still real twitchy and slow to steer ( think slow like the steering damper being turned up).
I am seriously thinking I will send them to Terry and let him do his magic but I want to make sure all other options are taken care of first, hence putting a new tyre on the bike today or tomorrow.

The rear is very plush in rebound and compression almost to the point of being to slow although I set it up going through a whooped out hardpack set of whoops in 3rd and 4th gear on the power and got it so it was tracking nice and felt quite smooth.

My problem is that now sand and rocks give the forks a mind of their own and the slow steering feeling is stressing me out to the point I hate riding the thing.
Cheers Mark




Quote:
Originally Posted by Jakobi View Post
That is a bit weird Mark.

Like 2 different symptoms at once. Have you spoke to the tuner regarding this?

A few quick things pop to mind.

You can add more oil to counter the bottoming (particularly if its only in the last half of the stroke). If its blowing throw too quickly you might want to address the valving again or look at spring preload or repsringing.

Slow steering. Was the shock done at the same time? It amazed me the effect the shock can have over the front of the bike, and the ride height at the rears effect on the steering. Also might be hard to recall, but has the tuner put the forks back in the same place in the triples. Have you tried moving these to see how they effect things?

I'm also thinking that it could be the rebound circuit isn't dialled in right. This is where the tuner would have spent most of their time as this is where you were at the end of the range. If its rebounding too fast it'll unsettle in corners. The front won't settle down which means it sits high and won't steer as sharp, and it'll also deflect or push back against ruts and rocks instead. Commonly known to climb out of ruts. If its really too fast you may notice the front end pogo when you land hard or punch into things. Compression doesn't sound too high as you keep saying it bottoms easily.
__________________
Xr 250 ( first bike)
98 Rmx
2007 Gas gas 300(swapped for trials bike)
2008 280 Raga replica
2012 Gas gas ec 300 E
Reply With Quote