3LikesBMI Racing "Copperhead 12" discussion and support
09-06-2010, 11:04 AM
#677
Hey Guys I am running crc pro cuts and I am trying to center the rear axel left and right with a track width of 172. I have 1 shim on each side and the track width is about 171.8. But it isnt even from side to side 
do you guys just use the shims in the kit or are there different sizes. any help tips will be greatly appreciated thanks
mike
do you guys just use the shims in the kit or are there different sizes. any help tips will be greatly appreciated thanksmike
3 shims(0.5mm each) each side should get you just to or slightly over 172.
with jaco's 6shims each side should do. bmi makes a 3mm wide aluminum shim which is a little more convenient than fiddling a stack of 6 shims.
if the axle seems not centered, measuring from the center hole to the hub flange, then it could be the left hub. do you have it wide boss out? if you have it wide boss inwards then the left wheel will be out compared to the right.
if it is the right side hub that is offset out more than the left, then post a picture without wheels on, that sounds like a mystery.
09-06-2010, 03:22 PM
#678
the crc rim is a little wider at 38.25 with 1.5mm offset compared to the jaco prism's 38mm wide with 3.0mm offset
3 shims(0.5mm each) each side should get you just to or slightly over 172.
with jaco's 6shims each side should do. bmi makes a 3mm wide aluminum shim which is a little more convenient than fiddling a stack of 6 shims.
if the axle seems not centered, measuring from the center hole to the hub flange, then it could be the left hub. do you have it wide boss out? if you have it wide boss inwards then the left wheel will be out compared to the right.
if it is the right side hub that is offset out more than the left, then post a picture without wheels on, that sounds like a mystery.
3 shims(0.5mm each) each side should get you just to or slightly over 172.
with jaco's 6shims each side should do. bmi makes a 3mm wide aluminum shim which is a little more convenient than fiddling a stack of 6 shims.
if the axle seems not centered, measuring from the center hole to the hub flange, then it could be the left hub. do you have it wide boss out? if you have it wide boss inwards then the left wheel will be out compared to the right.
if it is the right side hub that is offset out more than the left, then post a picture without wheels on, that sounds like a mystery.
09-06-2010, 03:26 PM
#679
I have it so the side with the longer boss is to the inside and the shorter boss is into the wheel. I think that what it says to do in the manual, I was thinking that hte longer side should go into the wheel for more support, but not sure cause the manual says shallow boss towards the wheel.
09-06-2010, 07:25 PM
#680
Didn't see this was answered, and you may have already figured it out, but use locknuts and put them on the upper pod plate. Center one turned up for the center shock, the other two face down for the damper tubes.
EDIT: My bad, I assumed you were building rear suspension.
EDIT: My bad, I assumed you were building rear suspension.
Last edited by HarryLeach; 09-07-2010 at 07:12 AM.
09-06-2010, 09:45 PM
#681
I have it so the side with the longer boss is to the inside and the shorter boss is into the wheel. I think that what it says to do in the manual, I was thinking that hte longer side should go into the wheel for more support, but not sure cause the manual says shallow boss towards the wheel.
review the picture 'step 27', if you notice the longer boss is out. another key is that the clamping screw is on top and forward on the axle, which puts the longer boss outwards.
no matter, flip it whichever way it gets you the desired rear width with wheels centered that you want. i don't think the thicker vs thinner boss really makes much difference to wheel support.
09-07-2010, 07:52 AM
#684
Tech Adept
I am not sure if the Copperhead is different?
But from this and the picture I understand that the clamping hub should have the long side toward the bearing???
