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| Upgrading for Front fork CR125 77/78 https://vintagedirtbikeforums.alp-sys.com/viewtopic.php?f=21&t=2235 |
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| Author: | stoprunner [ Tue Apr 07, 2009 10:00 pm ] |
| Post subject: | Upgrading for Front fork CR125 77/78 |
Is there anything that can be done to modify or improve the fork for 77/78 cr125's, I know there were some air caps that can be used for the early models, what about these forks? Thanks |
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| Author: | rayivers [ Wed Apr 08, 2009 7:03 am ] |
| Post subject: | Re: Upgrading for Front fork CR125 77/78 |
I found out about Race Tech cartridge emulators yesterday (thanks, Greg!): http://racetech.com/HTML_FILES/EMULATORGV.HTML I would contact them about your 35mm CR forks. They don't list your exact year and model, but probably have a unit that will work fine. They have a set for the '80 CR125R w/37mm forks, that may be what you need. I used air caps with a crossover tube to a central air valve for years on my CR, w/no springs. It really worked quite well and was 100% reliable, and the seals will never leak until you let the air out. I went back to springs recently hoping for less seal stiction and a more linear spring rate, but I think the action with air alone was better. Ray |
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| Author: | stoprunner [ Wed Apr 08, 2009 3:01 pm ] |
| Post subject: | Re: Upgrading for Front fork CR125 77/78 |
Thanks Rick What tubes did you use for the air cups, The 77/78 have these clips on top that hold everything together. For what I read, the 73/74's had the threaded tubing. |
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| Author: | rayivers [ Wed Apr 08, 2009 4:36 pm ] |
| Post subject: | Re: Upgrading for Front fork CR125 77/78 |
My '74 had large threaded chrome hex-head caps, but my MR uses unthreaded cylindrical plugs and circlips, probably quite similar to your bike. The unit I used was made by (I believe) Goki, and consisted of a brass center piece with a standard Schrader air valve, and two small stiff-plastic hoses that mated with brass threaded inserts in each fork cap. The fork caps had to be drilled and tapped for the inserts. I Googled around a bit but couldn't find any air caps for CR125M's. If you can find one, I would definitely go with the single-air-fill setup, as it's hard enough setting the air pressure on a single-fill system; getting two forks identical with such tiny air volumes would probably be really difficult (and even then, I bet they would change after riding a short while). Ray |
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