Stiff front suspension - advice?
Posted 30 April 2012 - 05:51 AM
I have a few front fork questions on my '03 WR450.
I've recently lost quite a bit of weight, and when I was riding this weekend, I noticed that I can barely compress the front end at all. Another buddy rode it for a while (and now loves my WR450), but had the same complaint. We bled the air out and we tried to soften up the compression & rebound as much as possible, but it was still stiff as hell. Nothing we did helped very much. I'm running the stock spring setup.
I may have never noticed it being so stiff before because:
a. I'm novice rider who usually rides woods trails
b. we were riding hilly terrain with many jumps and water breaks
c. I weigh 50 lbs. less than the last time I rode it here (I now weigh 200) with the stock spring setup.
I figured that I'll try to perform the fork maintenance and change the oil. I watched a few videos posted recently and it doesn't look difficult at all. I'm ordering some parts (dust seal, main fork seal, bullet, seal driver, etc.) but I can't find in the Service manual which weight oil to use.
On page 5-35, it says "Recommended Oil - Suspension Oil 01".
I was going to add Yamalube 5W to my order, but I thought I'd check here first before I ordered the wrong weight.
Any advice would be welcomed, thanks.
Posted 30 April 2012 - 08:19 AM
Several years ago, I tried to do what you are suggesting and tune the totally stock suspension by changing the oil weight, level etc. I was still unhappy with how the bike performed and then went to a shop. It was light-years better than what I could accomplish myself. I ride a 01WR426 and weight about 185 lbs. The stock springs were acceptable for me (even up to 195 lbs) but the internal valving, shock oil wt and height definitely needed to be changed.
Posted 30 April 2012 - 02:45 PM
Posted 30 April 2012 - 04:08 PM
Posted 30 April 2012 - 06:47 PM
I will definitely re-install the front wheel. I've read several threads today that echo how critical the front wheel re-assembly procedure is.