GW's Motorized
Well-Known Member
I thank a 2 stroke might be easier to make a V twin with. Either way it eill take alot of custom parts and alot of money
This group should design there own bike from the ground up!
- Thread starter ismellnownlatters
- Start date
Maybe? But when you get to the casting of a cylinder head, either piston ported, rotary valved or reed valved, the process for casting and moulding can become an issue.
4 stroke barrels, with an off the shelf OHV head might be easier to make. A side valve engine might be even easier, with the possibility of weights comparable to a 2-stroke of the same size.
Where it gets tricky is, a 1000cc 2 stroke is a wild contraption, and punching the powerband on even a 125cc piston ported V twin is stuff of legend.
It is not unthinkable to make a design that could be used for both types.
A dry sump 4 stroke case as a pre unit lends itself easily to 2 stroke conversion. Much more than a wet sump unit design anyway...
robe
Well-Known Member
I was looking at Princess Auto, (that is a Canadian Supplier of Chinese stuff like Harbour Freight), anyway they have 212 cc four strokes on sale for $140 CDN. Cheap like borche. How about a motor like this as a starting point although it is a heavy brute at 40 lbs.
BruceBanner1983
Well-Known Member
A 212cc motorized bicycle won’t weigh near what even a 250 motorcycle weighs though.
Your right...lol...But a bicycle frame supporting that 40 pounds and bearing the torque and stress is also not built anywhere near to the standards that a 250cc motorcycle frame is built to either.
BruceBanner1983
Well-Known Member
That’s true, it also depends on the frame you’re using though. I wouldn’t put a 212 in a cranbrook for sure.
After my Cranbrook frame cracked and broke on me a few years back I wouldn't even put ME in a Cranbrook ever again for sure...lol...lol.
Chainlube
Well-Known Member
The old cranny sure is a comfy bike though.
I used to think my Cranny was really comfortable too, Until I sat on my Hyper, there was absolutely no comparison, Hyper is so much more comfortable and super steady and smooth through all speeds that the P-85 can take it to...Maybe because the Hyper has a longer wheelbase stance then the Cranny.
BruceBanner1983
Well-Known Member
There are kits already available for the harbor freight 212 engine, but I went non-kit with mine.
