Hey guys,
Just ran across this here forum on my google search on big block bikes.
Just a bit of background info on me first off. I first put a motor on my bike about 6 months ago. 21cc mitsubushi TM21 on a Shogun Trail Breaker 3. 30mm bike peg friction drive, pre knurled. Went ok as power assisted but bogged down like crap at the scent of a hill (as you would expect).
From there i put a 26cc WW engine on a 16" kids bike with black plastic wheels and no pedals, spindle size of 12 mm (was built for offroad fun for my bro).
Scince then ive collected many engines and stripped them of parts (if dead) or experimented on if going.
My latest excapade was to put a 5.5hp 160cc honda on an old 50cc steel scooter, 70km/hr enough tourque to get up all but one hill so far. But alas i am bored of spending $70 for a tyre every 2 weeks from wheelspining it too much! (i love burnouts lol).
So i have decided to mount this engine on a modified BMX frame like this person has done with his project: (youtube address eludes me at the moment)
Basically just a shelf for it in a modified V of the bmx.
Today i purchased a 96 tooth 35 pitch sproket to go with my allready existing 12 tooth clutch and chain. My rear wheel will be a trash picked triple wall bmx rim (perfect), yet to find a frame after my old one was chucked out whilst i was asleep to the garbage man...
I am picking up some 5mm ally plate tomorrow to make a sproket carrier to join the sproket to the bmx rim via a disk break carrier that has same threads as a bmx freewheel.
Glad to be a part of this forum guys, comments and sugestions are welcome.
Will keep you updated,
Carl.
Just ran across this here forum on my google search on big block bikes.
Just a bit of background info on me first off. I first put a motor on my bike about 6 months ago. 21cc mitsubushi TM21 on a Shogun Trail Breaker 3. 30mm bike peg friction drive, pre knurled. Went ok as power assisted but bogged down like crap at the scent of a hill (as you would expect).
From there i put a 26cc WW engine on a 16" kids bike with black plastic wheels and no pedals, spindle size of 12 mm (was built for offroad fun for my bro).
Scince then ive collected many engines and stripped them of parts (if dead) or experimented on if going.
My latest excapade was to put a 5.5hp 160cc honda on an old 50cc steel scooter, 70km/hr enough tourque to get up all but one hill so far. But alas i am bored of spending $70 for a tyre every 2 weeks from wheelspining it too much! (i love burnouts lol).
So i have decided to mount this engine on a modified BMX frame like this person has done with his project: (youtube address eludes me at the moment)
Basically just a shelf for it in a modified V of the bmx.
Today i purchased a 96 tooth 35 pitch sproket to go with my allready existing 12 tooth clutch and chain. My rear wheel will be a trash picked triple wall bmx rim (perfect), yet to find a frame after my old one was chucked out whilst i was asleep to the garbage man...

I am picking up some 5mm ally plate tomorrow to make a sproket carrier to join the sproket to the bmx rim via a disk break carrier that has same threads as a bmx freewheel.
Glad to be a part of this forum guys, comments and sugestions are welcome.
Will keep you updated,
Carl.