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Chain adjustment, someone please school me...

4.7K views 6 replies 3 participants last post by  pmason718  
#1 ·
I had the rear wheel off and also did a re-gear and after getting everything all back together was lastly going to adjust the chain tension. Every other bike I have owned the deflection of the chain is measured on the bottom(below the swing arm) but the RC8 manual says to take the measurement on the top of the swing arm just in front of where it passes thru the swing arm. I am having a heck of a time getting any sort of reading there as the chain is nearly impossible to get a couple of fingers on to pull up on because of the chain guide being right there. Can you all tell me the easiest/best way to achieve this measurement? Has anyone figured out what the spec. listed in the manual equates to if taking the measurment on the bottom side of the swing arm since it is much easier to get a measurment there?

Thanks!
-John
 
#3 ·
Hey John, Here's how I check and adjust my chain. I use a small hook tool to hook through the chain roller right ahead of where it passes through the swingarm and just lift the chain until the desired measurement is reached. It works great.
Good luck, Bob.
Thanks for the tip/suggestion Bob. I'm assuming a person uses very little pull force when doing this, correct?

Thanks!
-John
 
#4 ·
Chain adjustment

The "force" you apply is somewhat subjective, but I use a small right angle hook tool from a "pick" tool set. Similar to a dental pick, so you can't get a lot of grip anyway which makes it fool proof for me. Just be careful when pulling up as I almost scratched my swingarm one time when the tool slipped out of the chain. The first time I tried this method, I placed a small metric ruler vertically in the bottom of the chain guide next to the chain for reference, then lifted with the hook, recorded my measurement and that was it. Just remember, if your not totally sure, a little loose is always better than tight. Tight chains play hell on transmission and wheel bearings.
Good luck, Bob.
 
#5 ·
The "force" you apply is somewhat subjective, but I use a small right angle hook tool from a "pick" tool set. Similar to a dental pick, so you can't get a lot of grip anyway which makes it fool proof for me. Just be careful when pulling up as I almost scratched my swingarm one time when the tool slipped out of the chain. The first time I tried this method, I placed a small metric ruler vertically in the bottom of the chain guide next to the chain for reference, then lifted with the hook, recorded my measurement and that was it. Just remember, if your not totally sure, a little loose is always better than tight. Tight chains play hell on transmission and wheel bearings.
Good luck, Bob.
Thanks for the detailed explaination Bob!

-John