belt drive build

Z

zukjay

New Member
this is the start to my whizzer type belt drive. i started today got about 2 or 3 hours in so far. i welded the drive pulley to drive wheel and extended the triangle on the left side. i used some 3/16x1 stock to expand the lower frame so i could keep tight clearance between crank and drive rim. ill post more as i go
l_30a8961e8e364fa4a423ed393d336401.jpg
l_e5f0ae1a6a734fa5b8ee04157c03d769.jpg
l_01b8cdad3e934e91ade867adac8de303.jpg
l_b311984bbac548479fbcac98e5f12321.jpg
 
man you hit that on the nose Terry, how did you guess.
so i gotta find parts for a jack-shaft i have some 1/2" steel rod from another project(26cc jeep power-wheel for my boy) I was thinking call some furnace or electric motor repair places. they have those squirrel cage blowers some have 2 pulleys on them and i believe they are 1/2" reason for jack-shaft engine output shaft right direction wrong side of bike
 
well i got back out in the garage for a bit tonight. worked on cutting down chainsaw case to minimum, and mounting the engine. I made a pretty good looking top engine mount. it took forever to decide how to orient the engine. here are a few pics.

l_be007396115845499e0bf15f1a4fa4ca.jpg

this is the engine im working with on this build.

l_87f76ae4a7064951b686975960ab913d.jpg

a homemade muffler, man this thing works good, saw this how to on spike's muscle cars couple weeks back.

l_27444744801e4d89ae03270c62bfc364.jpg

stock muffler mod to hook up exhaust pipe

l_ab6d2776921b4a02add47ba9b4b1f5ae.jpg

maybe rear pulley and use serpentine belt for secondary belt drive
 
l_8d1bdd171a4b4c11bf6ed7b4eb9a9b9b.jpg

top engine mount solid but i need at least one more good mount.

l_186b089eb3d54a878f6fc6e219dbc0ad.jpg

side shot nice clean fit


i do have a few more pics but just different angles. saturday by brother in law will be over for a few hours and we will knock stuff out more pics to come
 
LOL OK so I have fess up here because I'm not smart I'm just a smart A$$. In your very first pic at the top you can see the chain saw laying on the ground next to your bike so I just put two and two together. Can I make a suggestion why don't you strip that chain saw down to its bare elements. I don't think you need and the housing and it would make your build look not quite so shade tree. Aside from that I like what you are doing keep it up
 
Last edited:
well i thought of that too, but i want this thing to last. if i strip all of the plastic off, it will not cool properly. but it would look better. i think im gonna cover the whole engine area with sheet metal. but leave the pull start and vent in that area cut out/ exposed i think. i would be cool. kinda like a crotch rocket has the motor all covered. i will have to keep weight in mind, but 22ga metal is pretty light.

i pedaled it around tonight and i started the motor just to see if it could be done while in saddle. i will need motor mounts cuz 7 grand on the old fellers is a bit much. so rubber mounts are a must
 
wow i like that. i would have loved to not need the jack shaft but output shaft is on wrong side for right direction. i like you motor on that thing its bada$$. one thing about the jackshaft its very tunable, with pulley size. this one will have a manual clutch the centrifucal clutch is gone
 
Sweeeeet. Great work. I admire your DIY spirit.
Where are you going to get a belt the correct size??
-Mike
St.Louis, Mo
 
I just finished a project using this type of drivetrain, but I went with a Vbelt.
My pics were bumped over to the new MTB Pic section...Search 'Rocky Mountain RM7'.
Hope u like
-Lowracer-
 
You can do it with fatter tires if you have more frame/fork clearance to space the pulley-rim further away from the tire-rim. I decided on a road machine with high pressure skinny tires for maximum efficiency. I am looking into a cafe racer motorcycle style fairing now.
 
Very Cool Zuk and every body. Some great thunks and application.

Zuk, did you weld the second rim/band onto your rear wheel? Can't wait to see her done. Just bought 2 chainsaws and found most of what I was thinking won't work. Always the way, eh? But thats half the fun.
 
Last edited:
zukjay said:
man you hit that on the nose Terry, how did you guess.
so i gotta find parts for a jack-shaft i have some 1/2" steel rod from another project(26cc jeep power-wheel for my boy) I was thinking call some furnace or electric motor repair places. they have those squirrel cage blowers some have 2 pulleys on them and i believe they are 1/2" reason for jack-shaft engine output shaft right direction wrong side of bike
Click to expand...

Oh Man! Great idea about the blower jack shafts. I have a buddy who does large scale scrap. He has a few comerial sized building AC units and ducting sitting in a pile. Thanks for that thought! I love free, snork

.flg.
 
I like the idea! But I was wondering, I got a 68cc motor on my bike I bought online and I was wondering if it is possible to turn it into belt drive using smaller pullys i stead of another bike rim? Any suggestions????
 
What I'm going to be trying is a 16 bicycle rim for a nock off whizzer style pulley... Just an idea that I had, might be something to consider, instead of another 26 inch wheel.

I looked into the pulley that didn't mount to spokes idea, I couldn't find anything that seemed logical/ price appropriate, without a huge reduction set up.
 
You must log in or register to reply here.
Back
Top