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26 Posts
Hi
I am builting a TT1 race bike out of a 750ccm Pantah engine, i am lacking some info regarding the tuning of the bike, i have purchased a set of high comp pistons ø94mm (original ø88mm).
and need to fit them, this is not a major problem just a little milling.
what i need to know is how to adapt the rest of the engine to work with this piston/cylinder combo.
i was thinking about using a 748 crank with carillio conrods does anybody have experience using a 748 crank in different engine models, all info so far indicates it will fit.
when this is solved i need to know the optimal porting and inlet/exhaust diameter. 41mm carbs, 38mm carbs ?
45mm exhaust, 50mm exhaust ?
the work i can do, no problem, but the engineering not so much, if any of you would be kind enough to enlighten me on some of these issues it would be much appriciated.
just for info, i am building the bike on a pierbone TT1 frame with F1 swing arm, the marvis 3 spoke mag wheels of that era. and a Harris TT1 body kit.
i really need those Marchesini mag forks if some one has those.
regarding the engine it is getting the works, so far i have lightened the gears, machined a straigth cut 5 speed gearox.
light flywheel and lightened/polished rocker arms.
any pitfalls, reliability issues vs state of tune. i am chasing a rev happy engine with the peak power at about 9-10.000 rpm.
Best regards.
Christian
I am builting a TT1 race bike out of a 750ccm Pantah engine, i am lacking some info regarding the tuning of the bike, i have purchased a set of high comp pistons ø94mm (original ø88mm).
and need to fit them, this is not a major problem just a little milling.
what i need to know is how to adapt the rest of the engine to work with this piston/cylinder combo.
i was thinking about using a 748 crank with carillio conrods does anybody have experience using a 748 crank in different engine models, all info so far indicates it will fit.
when this is solved i need to know the optimal porting and inlet/exhaust diameter. 41mm carbs, 38mm carbs ?
45mm exhaust, 50mm exhaust ?
the work i can do, no problem, but the engineering not so much, if any of you would be kind enough to enlighten me on some of these issues it would be much appriciated.
just for info, i am building the bike on a pierbone TT1 frame with F1 swing arm, the marvis 3 spoke mag wheels of that era. and a Harris TT1 body kit.
i really need those Marchesini mag forks if some one has those.
regarding the engine it is getting the works, so far i have lightened the gears, machined a straigth cut 5 speed gearox.
light flywheel and lightened/polished rocker arms.
any pitfalls, reliability issues vs state of tune. i am chasing a rev happy engine with the peak power at about 9-10.000 rpm.
Best regards.
Christian