motorized bike

[camdendoughty]

so im putting a 4 horse power engine on a bike. i plan to use a pullies. ill weld another rim to the rear rim, and that will be the rear pully ill make a pedal that will push another pully up to tighten the belt from the engine to the rear wheel. ill post pictures when im done. what do you guys think?

[Hotfoot]

Sounds like the basic Whizzer setup.

[six]

4 hp is a lot. I have a 49 cc on mine and it will do about 25 mph with me pedaling. An easy 20 w/o me pedaling.

[camdendoughty]

id rather have to much than too little

[Steve from Ohio]

I had built from scratch a tadpole trike with a 32CC Golden Eagle bike engine on it. I was clocked by a local police friend at 43MPH. The Golden Eagle bike engine kits are top notch but I did have to modify in order to make it just a bit more stout.

43 MPH is fast on a bike but I built the tadpole myself and it really was overbuilt to be able to handle the speed.

Here is a photo:

[SidecarFlip]

Love the white walls. I believe at 43 per, a trike is the best bet. 43 on a 2 wheeler bicycle equates to a whole bunch of road rash.

[Steve from Ohio]

Love the white walls. I believe at 43 per, a trike is the best bet. 43 on a 2 wheeler bicycle equates to a whole bunch of road rash.

Actually they are not white walls. The tires are Schwalbe Big Apple tires that act like a suspension. The best tires I've ever used.

The white you see is the reflection of the sidewalls that have a silver reflective surface that when light hits them, they stand out like a sore thumb in the dark. The silver band is very small and you can hardly see them during the day but shine a light on them at night and they really reflect.

[wmgeorge]

4 hp is a lot. I have a 49 cc on mine and it will do about 25 mph with me pedaling. An easy 20 w/o me pedaling.

I think I have the same size 4 cycle engine on mine. Purchased as a bolt on kit, works fine. Yes 25 mph is pretty fast on a bike with no suspension, and friction brakes. Not like riding a motorcycle at all which I have done before.

[SidecarFlip]

Reminds me of my pre-teen days with a 4x8 sheet of plywood, some 2x4's a couple axles and wheels and a 5 horse Briggs lawnmower engine.

The plywood was the 'suspension'. It gave on every bump and there were no brakes and you steered with your feet...on the front 2x4.

Those old Briggs' engines could take some abuse.

[camdendoughty]

i never got around to finishing it, my friend made one so maybe ill put up some pictures of that at some point