My mate and i built this a few years back, but sold it before it was finished unfortunately. Excuse any continuity problems with the following as its been copied and pasted from an old thread.
engine is a gsxr 750 carb'd model from a 1984 gsxr 750, not quite as powerful as the modern day 750's but should be plenty quick enough to push a little go kart along *
the kart is a gearbox racing kart, with front and rear hydraulic disc brakes *
this is how it looked when it was collected
everything stripped off bar the rear axle as its seized in place *
chassis on axle stands ready to be cut and extended
we decided to extend it 500mm as that was the smallest distance we could get to allow the engine and exhaust to fit on the chassis twith the seat in position!
cut 3 lengths of tubing the same as the rest of the chassis, and slid them over the 3 bushes we made to make extending and keeping the kart inline as easy as possible. need another 3 bushes to continue anyway, no pics of those as yet, will sort sum out
seat rested in position
engine and seat rested in position
engine from behind with carb's on
engine and seat mounted to frame, front wheels and brakes on, steering wheel and rear driveshaft
heres a nice shot of the front hydraulic disc brakes
my mates been busy making progress with the kart *
cut the bike exhaust flanges off the manifold and fitted them to engine in preparation for making the manifold (excuse him being a fookin plum and struggling with counting to 4 *
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mounted the race can
also fitted the air filters and carbs
fuel pump, fuel supply isolator and gear selector
i think the isolation valve in the fuel line needs to go before the fuel pump straight after the tank, will have to make him change it *
But the best bike engined kart ive seen is this Ducati 748 engined one
and a link to a vid of it racing a Corvette
http://videos.streetfire.net/Player.aspx?fileid=ed4a74cc-207b-4842-b85c-37177e8d3bd2