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BDL Primary - Revtech Transmission

  
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BDL Primary - Revtech Transmission

 
boomtap boomtap
New User | Posts: 1 | Joined: 09/08
Posted: 09/25/08
05:35 AM

I am currently buidling a bike and I've run into my first big snag.  I have a revtech 6 speed transmission and a BDL 3" open primary.  I tried putting the two together and they won't fit.  The inside dimension of the bearing is 24mm and the outside dimension of the transmission mainshaft is 25mm.  I see on the BDL website that it is a frequently asked question about them not fitting and appearantly the HD mainshaft is 24mm.  Anybody else run into this problem and what did you do?  I tried contacting BDL but surprise, surprise, no response.  

 
bluefin907 bluefin907
New User | Posts: 1 | Joined: 09/08
Posted: 09/28/08
03:09 PM

You could heat the bearing and the inner race will expand  enough to install it  

 
clint71 clint71
New User | Posts: 3 | Joined: 12/08
Posted: 12/14/08
02:11 PM

i run a bdl open 3 inch primary with a 5-speed revtech and mine fits like a glove no problem. but heres what you can do maybe. simpley buy the correct bearing you need to fit the mainshaft. pull out the seal and old bearing from the aluminum plate and replace it with the correct one. hope it fits if so problem solved. if not, say the new bearing is got an outer diameter that won,t set into the bearing housing; get the right tool/drill bit and drill out the bore in   the housing being carefull not to countersink it too far into the seals position.  

 
clint71 clint71
New User | Posts: 3 | Joined: 12/08
Posted: 12/14/08
02:14 PM

allso, you heat a bearing and well, thats the leading cause of bearing failure. especially today as most bearings lube is sealed inside. good luck.  

 
unclepsycho unclepsycho
New User | Posts: 6 | Joined: 12/08
Posted: 12/21/08
06:47 PM

A lot of time went by from the heat the bearing advice till now. I agree with clint71, this 1-mm stretch could lead to premature bearing failure. getting the correct bearing is the right idea.
I hope it is not too late to do this.
Having worked at an auto parts warehouse in the past, I know that there is a bearing interchange book. Actually I have a copy. what we need is the exact measurements of the bearing needed. right down to the thousanth if possible.
Thickness, outer diameter and inner diameter, and is it a ball or roller bearing. with that we can arrive at a part number for your bearing. your local auto parts store may possess this book, but finding the guy that has the time and knows how to use it may be a challange. it does take a bit of time to do the research.

good luck
UnclePsycho  

 

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