my custom motorbike project

aricarmon · #11 (**permalink**) 07-12-2009, 04:53 PM

Quote:

Originally Posted by Maxvision

... figured the motor placement, designed motor mounts to fit the angle and placement, where to locate the chain pullys etc. Was a bit easier having a bike frame to start with...

hey what did you use for chain pullies to change the angle to the engine?

Maxvision · #12 (**permalink**) 07-12-2009, 06:24 PM

Quote:

Originally Posted by aricarmon

hey what did you use for chain pullies to change the angle to the engine?

I used skateboard wheels, screwed into threaded rod coupling nuts that I silver brazed onto 1/2 in. hex bolts, that I screwed into a 1/2 in. threaded rod coupling nut. I cut off the kick stand attachment plate and brazed on a thicker plate and brazed the 1/2 in. threaded rod coupling nut onto that. One skateboard wheel screws into the top of the coupling nut and the other screws into the bottom of the coupling nut allowing me to adjust the height of the rollers.

I turned down the skateboard wheels by mounting them on a drill press and cutting them just like you would on a wood lathe.

BrettMavriK · #13 (**permalink**) 07-22-2009, 07:45 PM

Very cool dynamic drawing, Aricarmon.
It has a striking resemblance to a bike I've saved in my archives.
Heck, it even has the same #7 on it.

Quote:

Originally Posted by aricarmon

so this is my bike, i started with i guess you would say concept drawing back in February while i was sitting through my anthropology class, i had been meaning to start for awhile now and finally decided i needed to do it so i researched this motorbicycling and found out some general knowledge. i decided to buy the 68cc jet china kit off of ebay (i got it for $125) and decided to buy a replica schwinn phantom tank. as soon as they came in the mail i decided to finally start with my frame. i stayed up until about three in the morning laying everything and double checking measurements to make sure everything was going to fit and be rideable. the very next day i bought a huge piece of plywood and layed out the grid so i could transfer over the scale drawing. and to my honest amazement everything fell into place and seems like its going to fit. my next step is to cutout the template and make a jig that i can bend the 1" tubing around to make the frame. i plan on documenting this as i go so throw in any suggestions you guys have or any possible devastating observations you have that i can fix as i go, thanx everyone im really excited about this