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JMC swingarm clearance issues
03-18-2007 | 05:21 PM
#1
Thread Starter
Junior Member
Squid
Joined: Feb 2007
Posts: 17
From: Tallahassee
JMC swingarm clearance issues
Does anyone have any experience with a jmc swingarm on their hawk? Mine has an elliptical adjuster and is adjusted so the rear is nearly as high as possible. If I adjust it much lower, the tiny amount of chain slack is enough at idle to make my chain lightly bottom out on my exhaust and make an almost pleasant ringing sound 
. The reason this has presented itself as a problem is because I'd like to go up a few teeth in the rear and although I technically have enough adjusting room, I'm afraid it would start giving me clearance issues again. Just check out my gallery for some pics.
. The reason this has presented itself as a problem is because I'd like to go up a few teeth in the rear and although I technically have enough adjusting room, I'm afraid it would start giving me clearance issues again. Just check out my gallery for some pics.
03-18-2007 | 06:44 PM
#2
Senior Member
SuperBike
Joined: Jul 2005
Posts: 1,548
From: MN
I don't have a jmc swing arm. Its an interesting design. If you are already having chain clearance issues it will only get worse with the larger diameter rear sprocket. Why do you have it adjusted to the highest setting now? I wonder how different the clearances would be by instead altering the ride height with a spacer under the shock mount (if you want it that high) and simply rotating the eccentric adjuster 180 degrees?
Is that eccentric design considered an advantage as a chain adjuster? It seems you can never separate maintaining appropriate chain length (as it stretches) from altering chassis geometry?
bill
Is that eccentric design considered an advantage as a chain adjuster? It seems you can never separate maintaining appropriate chain length (as it stretches) from altering chassis geometry?
bill
03-18-2007 | 06:52 PM
#3
Thread Starter
Junior Member
Squid
Joined: Feb 2007
Posts: 17
From: Tallahassee
I adore the jmc's looks, but it is a bit frustrating having to adjust ride height as a side-effect of adjusting my chain. The reason I have it at its tallest setting is because that's where my chain is at proper tension without draging on my pipes. Truth be told, I'd prefer it to be slightly lower.
03-18-2007 | 07:22 PM
#4
Senior Member
SuperBike
Joined: Jul 2005
Posts: 1,548
From: MN
I'm pretty sure if you rotate it all the way around to the top, and again get the correct chain tension you will then be at around stock ride height. You'd have to measure for sure but JMC say the top half is close to stock height and the bottom arc is for raising ride height up to 16mm - which would be about the same as a 5mm shock spacer. I'd try rotating it around and remeasure the clearances and you might have enough.
04-23-2007 | 03:19 PM
#6
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more than 18 countries and territories and employing 20000 people worldwide.
Many Internet auctions and stores in the US do not ship the products
overseas. As the result thousands of customers in Europe and Asia are not
able to
access the large market and purchase high-quality merchandise at so low
prices. Our service is in the ever-growing demand. Today we have more then
80
merchandise managers on the territory of the United States and Canada but
quantity
of our customers increases and we plan to expand.
As a part-time employee, you'll have access to the following benefits:
- $3,100 per month
- You need 8-10 hours free during the week, not more
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