I need a 4.8kg spring for my shock. I found one on Ebay that is a Showa 4.8. The owner says it is for a KX250F or CRF450 etc. Will this work? Do I need to know the stroke etc?
You need to know the hole size top and bottom to see if spring will fit over and not be too loose, and total spring length to see if your adjuster can set preload,
you should be fine with the stock rear and 42kg from race tech for the front,
I went down the road of the frp suggestions wiegh 165-170lbs and really wish I had gone with the 42's.. if you insist I can let you have my 38's for half and save you the money, I could put $50 more in and buy the 42's.
I also have a kouba link that will lower your rear spring rate through leverage and lower the bike 1.5 inches.
no sir he did not do any work for me, I did the shim stack mod myself and replaced the springs myself
the back shock was done by me too, after turning the clicker on the bottom to try to get the last click I thought was there and jambed the needle adjuster stuck and had to take apart anyhow to fix it.
dont get me wrong my setup it great and well ballanced untill you start really pushing it and want to get really airborn
some good pionts about changing the oil, I have worked my front clickers all the way in, I will have to research what oil I put in way over a year ago so I can go up 5 in viscocity
Here's how you check if different springs will fit.
1. go to http://www.racetech.com
2. go to the 'Search' then 'Spring Rate Search' menu
3. Select bike
4. click the link 'Custom Fork and Rear Shock Spring Calculation and Available Rates'
5. enter the details about riding type and weight
6. the page you now see has all of the spring rates and more importantly spring dimensions
7. repeat process for different bike and see if the springs are compatible
8. sit down and have a beer coz that was just such hard work (only one though or your riding may be impaired)