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| 43mm showa forks https://vintagedirtbikeforums.alp-sys.com/viewtopic.php?f=21&t=1709 |
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| Author: | Boats [ Sun Jan 06, 2008 9:58 pm ] |
| Post subject: | 43mm showa forks |
Hello everyone, I'm new to this site. I've been viewing this site for years and It looks to have good info so I knew it would only be a matter of time before I joined. I have a '79 Elsinore that is stock except for Progressive shocks. I think I might want to race it at the evo motocross. I would be in the amature/40 & over class. I bought what I think are 1982 showa forks off a CR480 from a bike wecking yard on line that I would like to put on the '79 bike. They are 43mm with 15 position clickers on the bottom of the sliders only. Are they '82? I started to rebuild them and ran into a couple of problems and even more questions, so I hope you all can help me out. I got one fork dis-assembled, but I can't get the valve un-screwed from the cartrige tube of the other. I tried using a wood broom stick, but it still spins. Any other suggestions? The first leg that is now dis-assemble looks like it might have been altered. First, the cartige tube looks like one of the 2 holes in the top of the tube has been filled and re-drilled witha small 5/64 hole. Also 2 of the 4 holes on the bottom of the tube have been filled. One more thing. The clicker valve looks like it is missing the top portion. Is this normal? The reason I ask, is because I would also like your opinion on spring size. I am a 285 pounds. Thank you all, Rick |
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| Author: | redrocket190 [ Mon Jan 07, 2008 12:16 pm ] |
| Post subject: | Re: 43mm showa forks |
If you have 15 "clicks" they are 1983 Showa forks. (The 1982 forks were Kayaba and had 3 "clicks" of compression adjustment.) Depending on what lower triple clamp you have, you may be able to transplant the steerer tube from your 1979 bike, or you will need to add a spacer under the top clamp because the later steerer is a bit longer. At 285lbs you will definitely need stiffer springs than stock. I am 185lbs and ended up with .46 kg/mm springs. I got mine via Race Tech but I think their springs are from Eibach. Their part # is 996.XXX.1 where XXX is the spring rate. The heaviest appears to be 0.47 kg/mm. Damping-wise I went with Race Tech emulators which are additional valves that float in the fork above the stock damping rod and under the (cut-down) spring. This may be the way for you to go if the stock compression adjustment will not accommodate your weight. BTW, I use a broom stick to hold the damping rod, but an impact wrench on the allen bolt. |
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| Author: | Boats [ Tue Jan 08, 2008 1:21 pm ] |
| Post subject: | Re: 43mm showa forks |
Thank you for the info. Sure helps to know what forks I'm working with. |
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