Another Columbia Build...Pic Heavy

So i ordered this bike over a month ago once i saw it online, knowing i would want to build it eventually when i had time. Well now i have time, and i see others are building this bike too, most notably Mr. KC; so thats good. Bikes looking good so far, did a rear gas tank rather than make an awesome one or use the stock one. .Made the rear gas tank rack partly from the rack that came with the tank and partly from the brackets that were on the original rack, (cut and drilled to size).. Besides needing the offset intake, the only problem I'm now having is with the lower mount. .I made this mount out of the large mount that came with the kit with some modified spacers, but I'm not digging the fit too much. Might consider making something new or buying a mount from SBP. . Once i get the intake in ill finish the build.

 

[MotorBicycleRacing]

I'm now having is with the lower mount.

View attachment 56628.
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Could you please tell me the measurement from the front of the motor to the down tube in this pic?
Thanks.

 

[schwinn123]

from the downtube to the engine block (not stud) its roughly 22mm or .80 inch. Hard to get a good measurment now that the temporary mount is in place.

 

[KCvale]

First things first, remove the studs in the front mount.
Whatever you use as spacer plate you want to put grade 8 bolts from it into the engine base.

Then a good U-bolt muffler clamp on the frame for another flat mounting spot really really fat bolt size (the U-bolt).

Get that right and you are golden ;-}

 

[schwinn123]

Awesome KC, thanks for that. The plate I'm using is the plate from the extra mount that came with the engine kit. Im debating on ordering the SBP or similar plate from somewhere. But whichever plate i use, i will use your advice. Thanks again.

 

[KCvale]

My pleasure S123, I like helping others as much as doing it in the first place.

Nobody sells a complete package of parts to reproduce my front mount, and I have a better plan for one when I have time, but contact me privately and I'll see what I can package up for you.

 

[schwinn123]

Thanks alot, im pretty sure i got a good mount going on here, ill post a pic as soon as i take one, im having a bit of clearance issues with the chain against the frame. I know you did not use a tensioner, but how close were you to the frame on your build? im not sure if its the crappy tensioner throwing me off or my positioning of the motor. Still waiting for my offset intake, but now this is my only holdup, then this baby will be ready for sale.

 

[schwinn123]

Update again. Still having chain issues. Not running straight enough and wants to jump off sprocket. It seems due to the oval shape of the frame rail and the tensioner not wanting to aim straight. What to do what to do....

update. I was able to shim the pulley of the tensioner and it gave me some clearance. i thinki shouldbe ok, once its running ill know for sure.

 

[dougsr.874]

I put mine in a vise and bent the upright metal piece so that it stands straight up

 

[schwinn123]

That's an idea, I'll give that a shot, thanks Doug.