Sixty-seven fifty, a 79 Predator/Qmatic build

MotorbikeMike

Member
Joined
Feb 2, 2007
Messages
43
Hi all, it has been a long time since my last post, and quite a while I have built anything other than Whizzers, both Vintage, and New Edition. It had come to my attention that a 79cc Predator could be made to run at a similar level, and with similar results as a 1946 Whizzer H-motor kit bike. I have a 1946 H, but mine is not a good example of what to expect, since it has a High Lift Cam, High compression Head, big bore, big manifold and pipe, and big valves with appropriate porting to make it run (did I mention a different carb?). So, what are the expectations? No pedal needed at takeoff, better that 30 mph with heavy rider on a 26 inch bicycle. No sweat, I figure!
The Start:
67.50 spent on an Electra steel framed stretched Cruiser at Flea Market
whatever the 79cc Predator cost me
a new Q-matic, specially drilled for HF Engine 2.5 inch primary pulley, AX belt
a custom sprocket adapter made for us, allowing me to use cheap steel sprocket
44, 48, 50, 56 and 60 tooth sprockets in my stuff
Pedal extenders
Flex pipe exhaust
custom tak (repurposed)
a cheap mountain bike suspension fork
V-brakes
Steel wheels spoked in .105
I will make a motor mount using some factory parts and some stuff, as the frame is stretched, it will not be able to use a stock motor mount.
I have pictures, but will need to learn how to upload them, I expect it is not too difficult, but it's not abundantly clear to me:)

MotorbikeMike
 


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