Psycho Billy Cadillac

Hello All… new here. Wanted to post a build thread of my new bike. For now I’m just going to upload a few pictures. I thought I had already posted a few for a build contest but I can’t find them. I guess it was a different forum. I’ll start with the latest then when I have time I’ll post a few pics with an explanation of how I put it all together. Thank you for your time and allowing me to be here.

Please forgive the sequencing of these photos. I’m new at this and haven’t figured out quite how to put text next to each photo.

So I started out with a Micargi frame and a predator 212 hemi. I was going to install the motor vertically but I wanted the electric start and that somewhat prohibited me from doing so. I installed the wide crank set up from Affordable Go Karts. I just had to mill out the lower bracket for the sealed bearings. It worked out rather nicely. The lower tube on the Micargi frame is 1 3/8” inch. I cut the kickstand plate and the washer at the back end of the lower tube out and stuffed a 1 1/4” x 1/8” wall DOM tubing inside the lower tube about 16 inches long to add some structural integrity to the frame. Initially it was clear that the pipe wasn’t going to slide right in so I threw it in the freezer overnight…
it fit perfectly. My friend’s son welded two plates right below the seat and two plates at the tail end of the lower tube right in front of the rear wheel for more structural support. I ordered some 2” x 3” x 3/8“ 6061 aluminum angle and fabricated the lower rails for the motor mount. For aesthetics and a little weight savings I milled 1 inch holes along the aluminum rails with a step bit then bolted them to the lower frame tube using five 3/8” grade 8 bolts and nylon locknuts. I wanted to use a torque converter instead of a centrifugal clutch but using the whole assembly shifted the motor too far to the right to afford any sort of balance. I ended up making a pillow block out of 3” x 3” 6061 aluminum 3 1/2 inches long to house the bearings and jack shaft that carry the driven pulley and rear wheel drive sprocket. This enabled me to eliminate the plate that came with the torque converter, thereby shifting the motor to the left about an inch. It ended up exactly where it needed to be and all was right in Lugnut’s world. I used a 1/2” 6061 aluminum plate 5 3/8 inches wide by about 14 inches long to mount the motor and pillow block to. The belt drive required a specific distance between the crankshaft and the jack shaft. By using the documentation that came with the motor and a little trigonometry I was able to calculate the horizontal distance from the rear motor mount bolts to the center of the pillow block. It’s not adjustable; I didn’t see the need as there are four 3/8” grade 8 bolts with nylon lock nuts holding the motor to the plate and the same holding the pillow block to the plate creating an assembly that does not flex or slip. It worked out perfectly and again, all was right in Lugnut’s world. I milled pockets in the aluminum rails that I bolted to the frame to accommodate the nuts protruding through the half inch plate for the motor and pillow block. The whole assembly was then bolted to the aluminum rails using… you guessed it …four 3/8” grade 8 bolts. More to come…..
 

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Chainlube

Well-Known Member
Joined
Jan 5, 2020
Messages
4,537
Nice forks, they have the old drag bike look to them. You're not going to ride that death trap are you? LOL! :ROFLMAO:

Electric start too. (y)
 

Lugnut

New Member
Joined
Jul 3, 2021
Messages
12
Nice forks, they have the old drag bike look to them. You're not going to ride that death trap are you? LOL! :ROFLMAO:

Electric start too. (y)
Thanks Chainlube! Forks are NTZ Racing… or something like that. Chinese. They’re OK but not actually designed for high-stress applications. The cover plate for the flywheel is from a steamer pan from Goodwill... and yes, I’ve been riding it… runs like a scalded dawg.. LOL
 
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Lugnut

New Member
Joined
Jul 3, 2021
Messages
12
Plate from torque converter that was eliminated and pillow block that replaced it. It’s solid.
 

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Chainlube

Well-Known Member
Joined
Jan 5, 2020
Messages
4,537
Plate from torque converter that was eliminated and pillow block that replaced it. It’s solid.
If you go to BMI carts you can get performance springs for your clutch or Go Power will have them too.
 

Lugnut

New Member
Joined
Jul 3, 2021
Messages
12
If you go to BMI carts you can get performance springs for your clutch or Go Power will have them too.
Go Powersports is who I bought the torque converter from. I opted for the “Super 30-75 Jugg-A-Verter” drive clutch. I bought a few goodies from them like 18 lb. Valve springs, header & muffler.. great business they have. Fast shipping & super customer service.
 
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