Just got some Gold Valves for my 2008 WR450F, and I am wondering what's the procedure to do the surgery and if any special tools are required.
The procedure looks pretty simple up the the removal of the base rod. Basically here is what I figured out (since I will more or less working out of a shed, the order is probably not the one that people are used to...)
- Remove front wheel / handlebar / fork protector / whatever else is in the way.
- Unscrew rebound screw all the way.
- Loosen top triple clamp bolts, keep lower ones on.
- Unscrew top cap - What size wrench's needed there?
- (here I am going keep the fork leg on the bike because I don't have a vise...).
- Unscrew top cap, pull top cap out an inch or so.
- Using flat wrench (under the top cap) to hold the damper rod, unscrew top cap.
- Remove spring
- Remove base valve assembly (14mm wrench - can anyone confirm?)
Now here is my problem.... I am not sure how to hold the damper rod to prevent it from turning while I unscrew the base valve... I looked at the Yamaha service manual and it shows that a "Damper Rod Holder" is needed to hold the damper rod (!) The part number is YM-01494 and they seem to be pricey. There is a thread on the forum about making your own with a PVC pipe, but it's unclear what diameter is actually needed with the 08 forks (48mm). And I won't have access to a impact wrench either.
- Once the base valve assembly is removed, let the oil drain (pump the fork a few times if needed)
Once the base valve assembly is out, the Yamaha manual is very light (nothing!) on how to remove / take apart the Base Valve assembly but this video from Race Tech seems to have most of the information. Is it pretty accurate?
What else am I missing?