What 4 stroke for my first build?!

[jahanness]

Hey there, I'm looking to make my first build on this frame http://www.gasbike.net/collections/...ke-aluminum-bike-frame-with-built-in-gas-tank and i want to put a 4 stroke on thats over 50cc because I live in a very hilly area. I'm looking at the predator 79cc kit right now, but im still wondering if theres a better option out there. Any input or suggestions would be much appreciated.
Thanks

 

[TheNecromancer13]

Better option would be to use the 79cc, but not get the kit. The predator kits do not come with everything you need to build a bike, and what they do include is marked way up so the seller can make a profit. Also the predator kits have no instructions. If you want to build a predator bike, build it from scratch. I have made a tutorial on how to do this which can be found here: http://www.instructables.com/id/79cc-Motorized-Bicycle-From-Scratch/

 

[KCvale]

Hey there, I'm looking to make my first build on this frame http://www.gasbike.net/collections/...ke-aluminum-bike-frame-with-built-in-gas-tank

Ya, that frame is a gasbike cheap knock-off of the real Grubee Skyhawk frames, for example no rear disc mount.

I want to put a 4 stroke on thats over 50cc because I live in a very hilly area. I'm looking at the predator 79cc kit right now,
but im still wondering if theres a better option out there.
Any input or suggestions would be much appreciated.
Thanks

Yes, there is a pretty good 'other option' now, well soon as I have a heath issue right now.

The 49cc or 53cc are enough to power you up to ~40mph and tackle hills and still maintain ~20mph because of the bike gears.

I modify a Skyhawk 4G to a 10G long shaft of my design to drop the engine output over the pedal systems sprockets.

The main 100T belt pulley is a freewheel, which means you have virtually no drag from the engine part even with the engine off when you pedal.

In short gears rock ;}

 

[bluedogeli]

how did you extend the output from trans to pilot bearing?

 

[KCvale]

how did you extend the output from trans to pilot bearing?

I designed a new shaft and got it made ;-}

 

[bluedogeli]

Merry Christmas! Any suggestions on design and fabrication?