CRF100 Rear Spring Revisited / Tuner / All

External Since: Feb 12, 2006 Posts: 17

Thanks, Tuner. Another question if I may, I replaced the fork springs with
BBR springs and now the front forks make a metallic clunk when hitting roots
in the trail. They seem to work well in the whoops (according to wife unit)
but the roots are "jarring". Can you tell me why / how to fix?

Thanks,
Tim

External Since: Mar 07, 2005 Posts: 375

On Sat, 3 Mar 2007 15:19:48 -0500, "Scott" <tkscott32311.TakeThisOut@comcast.net>
blathered:

>Thanks, Tuner. Another question if I may, I replaced the fork springs with
>BBR springs and now the front forks make a metallic clunk when hitting roots
>in the trail. They seem to work well in the whoops (according to wife unit)
>but the roots are "jarring". Can you tell me why / how to fix?

Spring rpeload is critical for the forks to work well. Not enough and
the forks drop more than they should. Too much and you get a harsh
ride over sharp edged bumps. Typically, I'd expect your/her 100 to
have about 10mm fork spring preload.

If the spring outer diameter isn't as large as the stock springs, they
may move around and make some noise.

MX Tuner
'03 Honda CRF480R
'06 Suzuki Hayabusa 1300
'06 Nissan Titan LE