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Rear suspension lay out
- perattzi
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31 Aug 2009 20:27 #318113
by perattzi
1978 KZ650B w/ Zuki running gear project
Replied by perattzi on topic Rear suspension lay out
I'm at the same point with my 650 project...trying to figure out where to mount the shocks to my SV650 swingarm and how long they should be...and the affects on the rake/trail.
1978 KZ650B w/ Zuki running gear project
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- mark1122
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- Keep twisting it
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02 Sep 2009 19:54 #318751
by mark1122
76 KZ, frame gusset work,1200CC.Ported by Larry Cavanaugh, 1.5mm.over intakes, Carron Pipe, ZRX12 rear end, and seat,96zx9 front end.
01 CBR600F4i Track bike.
Cobourg, Ont. Can.
~ ~ ~_@
~ ~ _- \,
~ (k) / (z)
Replied by mark1122 on topic Rear suspension lay out
from what I’m seeing now. i need shorter shocks for sure.
I just realized that since my swing arm is lower than it should be,(about 3.5" due to the shocks being too long) it is stretching the hell out of my chain. As the shocks compress over a bump , the chain gets tighter. If I adjust the chain to have 1.250" of slack and then compress the shock 3", the chain is sprung very tight. This explains why my chain has stretched sooo much.
If the swing arm pivot and axle are in line with the output shaft the chain will get looser as the shock goes up or down.
if the arm is above, or below this line the chain will get tighter.
Therefore, this seems to be the starting point. then u can find the optimum angle to get a progressive spring action (as the shock compresses it gets harder to compress, rather than linier.)
Thanks for the help Leon. i sent u an email.
I just realized that since my swing arm is lower than it should be,(about 3.5" due to the shocks being too long) it is stretching the hell out of my chain. As the shocks compress over a bump , the chain gets tighter. If I adjust the chain to have 1.250" of slack and then compress the shock 3", the chain is sprung very tight. This explains why my chain has stretched sooo much.
If the swing arm pivot and axle are in line with the output shaft the chain will get looser as the shock goes up or down.
if the arm is above, or below this line the chain will get tighter.
Therefore, this seems to be the starting point. then u can find the optimum angle to get a progressive spring action (as the shock compresses it gets harder to compress, rather than linier.)
Thanks for the help Leon. i sent u an email.
76 KZ, frame gusset work,1200CC.Ported by Larry Cavanaugh, 1.5mm.over intakes, Carron Pipe, ZRX12 rear end, and seat,96zx9 front end.
01 CBR600F4i Track bike.
Cobourg, Ont. Can.
~ ~ ~_@
~ ~ _- \,
~ (k) / (z)
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- 531blackbanshee
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03 Sep 2009 07:42 #318838
by 531blackbanshee
skiatook,oklahoma 1980 z1r,1978 kz 1000 z1r x 3,
1976 kz 900 x 3
i make what i can,and save the rest!
billybiltit.blogspot.com/
www.kzrider.com/forum/5-chassis/325862-triple-tree-custom-work
kzrider.com/forum/5-chassis/294594-frame-bracing?limitstart=0
Replied by 531blackbanshee on topic Rear suspension lay out
happy to help,mark.
leon holmes
leon holmes
skiatook,oklahoma 1980 z1r,1978 kz 1000 z1r x 3,
1976 kz 900 x 3
i make what i can,and save the rest!
billybiltit.blogspot.com/
www.kzrider.com/forum/5-chassis/325862-triple-tree-custom-work
kzrider.com/forum/5-chassis/294594-frame-bracing?limitstart=0
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