420cc Motorcycle Build Ideas

[GrimmSpike]

First time on this site as a member, but I've built one of these 66cc bikes before, now i'm addicted and want to go further. I want to use a 420 predator to make an actual 50mph motorcycle. My question is this:

Where can I find a small (minimum 3 speed) transmission that can take up to 20 hp and 4000 RPM? (I want it to be overkill so it's a bit sturdier) And would a torque converter or a centrifical clutch be better to fit in between the engine and the trans?

I have already found this one that seems to be close, but this one in particular can only take 2400 RPM (Link below)

This motorcycle is still only theoretical, as I'll definately have to drop over a grand to get all the parts, but I am leaning towards doing it.

http://www.peerlessgear.com/node5380.aspx?nid=300905

 

[culvercityclassic]

Your best bet for that build: http://www.gopowersports.com/40-series-torque-converter-kit-bolt-on-8hp-18hp/

 

[Tony01]

You don't need a 420 to go 50, a stock predator with the govdelete will do that.

Also that transmission won't work for you, but a 40/44 series TC will.

 

[GrimmSpike]

sounds good, I'll look into it. And I know the 212 should do 50, but I'm looking for a ton of torque to play around with.