Rubber mount

superhawk · #1 10-19-2008, 10:16 PM

Just got one of China 66cc motors and looking at the flimsy stock mounts, I decided to make them better. At the same time, make them rubber mounted and adjustable side to side.
This is what I came up with for now, I would've made the mounts out of aluminum but steel is more forgiving in the first design, besides my aluminum TIG welding sucks.
The rubber inserts are front sway bar link rubbers from a 5 litre Mustang turned down to fit. They are made of polyurthane which are quite hard.I may use a softer rubber later.The feel gauge(0.004) in one of the pics. is the clearance so the motor can move up + down but not twist from side to side. The weak spot is the stock 6mm threaded mounting holes on the motor, if they strip out I'll helicoil them as there doesn't seem to be enough meat for 8mm maybe 7mm.Hopefully this design won't throw the drive chain, then a head steady will be necessary.
My rubber mount design is a flagrant copy of the ones on the Norton Commando motorcycle, so feel free to use any and all of these ideas. I have yet to make the front frame clamp/mount. By the way, that's a Creative Engineering & Design clutch housing, real slick.

superhawk · #2 10-19-2008, 10:18 PM

More pictures

superhawk · #3 10-21-2008, 05:35 PM

I finished the front motor mount today, I think I overbuilt the whole system, I probably could mount a small block Chevy in the bicycle.
I hope this works, spent way too much time on this project.

TexasDav · #4 10-21-2008, 06:09 PM

Quote:

Originally Posted by superhawk

I finished the front motor mount today, I think I overbuilt the whole system, I probably could mount a small block Chevy in the bicycle.
I hope this works, spent way too much time on this project.

I bet you make that time back up not haveing to retighten every screw and bolt after every ride from vibration. Nice work!

**Dan** · #5 10-22-2008, 07:12 AM

Nice work. Looks manufactured.

**Bikeguy Joe** · #6 10-22-2008, 07:15 AM

Keep us updated on how it works.

Technocyclist · #7 10-23-2008, 05:09 AM

Very nice, indeed... any chance you want to sell those mounts?

superhawk · #8 10-23-2008, 07:13 PM

Quote:

Originally Posted by Technocyclist

Very nice, indeed... any chance you want to sell those mounts?

Thanks for the compliments, however this system is untested yet and I hope to test it this weekend.The one in the pics. are a one-off to fit on this Norco cruiser. If this works, then I will design a system which is much simpler and adjustable to fit different types of frames.
I don't plan to make -to -sell, however I will post plans and dimensions when I'm done.

chuckisnutz · #9 11-08-2008, 02:21 PM

Excelent! I am very excited to see how this pans out. Subbed!

superhawk · #10 11-08-2008, 08:29 PM

Had a few issues with the muffler,the header pipe had to be lengthened and muffler braced to the motor to move with the motor.The chain was too short as the rear motor mount moved the motor more forward than stock.I had to find a #41 chain(only sold in 10' lengths) or a 415 chain, most bicycle shops never heard of a 415 chain.I spent last week getting my pocket bike powered bicycle running, totally stoked on how it runs. Will post on progress on this project shortly.