|   Manitou SX-R - Need help with TPC | Carl Mega
Apr 7, 2002 9:08 PM | | Ok, I had the lower legs off the SX-R for the first time yesterday and I noticed that there is very, very, very little reisistance in the TPC rod. It moved up and down freely. Now, I DID have the bike upside down at the time. Could this be why? When I put the lowers back on and played with the rebound knob, I could feel a very noticable change in the rebound speed. However, the same can not be said for the compression. Turning the TPC knod did not make a noticable difference. The fork feels OK and doesn't pogo like mad. Still, since I'm unfamilar with TPC (I'm generally a Marz guy) I figured best to ask the supsension gurus here.
So, should I pop the TPC and check the oil level? Does the TPC (compression) tuning normally make a noticiable difference that can be felt in the garage/riding around? Basically: Is something wrong and if so, what?
Am I normal, huh? Huh? Tell me. Please, let me be normal ;-).
Also, I do get some oil weeping from around the TPC knob.
Any advice and instructions will be appreciated. Thanks. |
| re: Manitou SX-R - Need help with TPC | PBK
Apr 8, 2002 3:34 AM | | I'm not sure exactly what you're problem is with the fork, but there isn't supposed to be any resistance in the TPC leg. It only serves to control the damping and rebound - the suspension is in the other leg, where the spring and MCU stack is located. However, it is always a good idea to check the oil level while you're at it, since it is both very easy to do and important to the function of the fork. www.answerproducts.com has very good picture-by-picture instructions on service, as well as tech manuals in .pdf. |
| TPC damping... | alibi
Apr 8, 2002 9:59 AM | | ..compression or rebound, will not be functioning when the fork is inverted; all the oil will be drained away from the pistons. With the fork in proper position, and the lowers still off, you should be able to feel small changes as you dial the compression damping and push the rod in, especially quick pushes at the beginning of the stroke. Changes in the rebound are a bit more easily felt as you noticed. But changes are very hard to feel when just pushing down on the fork while standing still or even bouncing around in the garage. Tuning really needs to be done on trail to suit your style, trails etc. That's why the more expensive forks make tuning easy to accomplish on trail. You should probably check the oil level no matter what and will give you the chance to snug up the TPC side top cap in case that's where the leak is; a little weepage is normal though. If the compression damping feels inadequate after some ride testing, you might consider going to a heavier weight oil, especially if you're 200lbs or more. Personally, at 165 lbs, I run the recommended 5 wt oil with the compression damping almost fully out.
Hope that helps. |
| Quality Assistance- thanks. | Carl Mega
Apr 8, 2002 2:29 PM | | I had a feeling that being inverted was the issue. I already had the legs back on when I was like "Oh, I should have righted the bike THEN tested it again". As far as the compression dampening goes, I think it varies from fork to fork because I can instantly feel a difference in Marzocchi products. It's imediate and noticable. I now know that I can't use the same "measuring stick" for the Manitou forks.
I thought I had it tuned well before disassembly so I'll stick to the original settings I've been using for the past 6mo.
Thanks again! |
| |
