motors?

I just have the stock 72cc , some extra HP would be nice but how does the bigger CC's do on your fuel economy? What would be a nice motor upgrade for power but not too harsh on the fuel economy?

I'm gonna be building a drag bike within the next year. I have limited funding and love 2 strokes, so I thought about using a snowmobile motor. Probably use a 440cc, which seem plentiful on ebay. I want the bike to have around 40-50hp which seems pretty easy with a 440cc 2 stroke. Anyone...

I have seen a couple awsome cruisers at wall mart cheap and thought if i can get a bike motor on one it would be a fun toy. anyone have one? or anyone have a bad experiance with one? There are a couple motors cheap on ebay, i was wondering if it was worth it?

I was just wondering if someone knew exactly what parts are interchangable between the two?

Are there clutches available to fit the 1 inch cranks of the bigger hp motors and still use the small #35 chain?

there was a running 5.5hp and a 5hp for parts on CL. someone bought them tonight so i didn't get to. was it someone from here? i knew i should have told him i could have come out when i got off work. i didn't do it because it would have been a hellish drive with traffic (hour away from me with...