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Spring, how stiff?

2K views 25 replies 10 participants last post by  Daimon1054  
Again I really am not sure a quad has 11" travel and has to take a lot more abuse. But I am sure they sell more of them so that may affect price. I called and have not been called back, I think others need to try as well and whoever gets through post the price and lead time.
 
I am not sold on air systems. Some that I have seen are just mounting points so you can raise and lower the bike which still does nothing about the shock. Others replace the shock with an air ofer hydrolic system and then you start having air compresability problems. Not the lease of which is that if you use compressed air instead of oxygen and their is any oil in the air system (common on many compressors) then when you compress the air on a bump you just made a diesel motor down there. Thats right BANG!!!!! Ask us old dumb ases who knoew better than the FOX factory and figured air would work on their system. I blowed one up.
 
I put in a call to works to get a price but they were very busy. As soon as I have info I will post it.

DT you are like me a big feller lol the stock shock was meant to be ridden by a dude between 140 and 180lb so yes you need a better shock. Your big butt does the same as mine and we blow through the valving.

Also I found the shock does not like to be run with no preload so I would try bumping some back in with the spring and seeing what it does.
 
The 03 added a rebound adjustment. I have not been on an 03 so I can not really say but I can tell you the shock is still crap. I would guess the shock is still set up for the stock spring though and there will not be enough adjustment to correct for a heavy spring. Remember Yamaha buys from the lowest bidder. In a few miles you will need to replace it same as on a car. You ever notice how much differance a new set of shocks makes? Now try a really good shock! Better yet have the suspension taylored to your weight riding style and road conditions and think how much better life will be.
 
Yes also the new shock will be rebuildable so it will last a life time. The stocker is just like on a car it will wear out. and as cheap as it is I am guessin 10,000 miles is all it will go. Just like your car it will go slow so you do not notice it.

I raced dirt bikes for 30 years and set up suspensions every day. Trust me, call works give them all the info. Then ask for recomendations for the Forks. A spring and oil change there too match the rear and you will end up with a balanced system. You will think you are on a different bike.
 
Wolfhound is correct in that the shock on the 02 bikes are oversprung. Going to 900 or 100lb spring will only hurt. Sure you will not bottom but you will kill the shock in a short time. A few things happed.
1 the shock used flexable disks to slow the flow of oil, the more disc the stiffer the stack and the slower the oil moves. Because the shocks are so cheap the spring on the stock bike forces the oil past the shim stack to fast and the bike hops under braking and rebounds to fast after a bump so on accel. the rear tire can loose contact as you go over bumps.
2 as the oil goes past the stack small bubbles are formed then as the oil heats up, which happens faster because you are frocing it through the stack with too large a spring the air expands and the oil foams. Now the shock is worthless because while oil can not be compressed air can. So before the shim stack can come into play the air must be compressed and then it will expand again giving a wallowing feel.
3 once this starts to happen you get 2 sensations the first is that the shock is to soft because you are bottoming out all the time. This is because the shock is no longer doing it's job. Second is the shock is to stiff because it rebounds to fast.

So you see that going to a stiffer spring on the stock shock will help in not bottoming the bike but it will cause all of the things above to be worse. So your rear tire will be bouncing all over the place. But hey you will not bottom out!

The best thing to do is ride it till the rear shock goes **** up or if like me you save upenough money (might be a while /emoticons/emotion-6.gif ) then call works performance and order a shock that is set up for your weight and riding style.
http://www.worksperformance.com/
21045 Osborne Street • Canoga Park • CA, 91304 • USA • Phone (81/emoticons/emotion-11.gif 701-1010