I have a highly modified tohatsu 50 from my thundercat that I'm thinking about selling. Will spin an 18p cleaver to 6500rpm at 53.7 knots 2up.
Spec:
yamaha 70 carbs - rejetted
boyesen carbon reeds
opened reed cages
ported and polished intake and exhaust ports
1mm skimmed off head
ring gear removed from flywheel
welded crank
above prop exhaust outlet
new powerhead gaskets all round
new gearbox
tohatsu 50d1 exhaust pipe
polished pistons
mikuni triple outlet fuel pump
nakuru racing coils
you can read more about it here -
http://www.boatmad.com/forum/f3/my-t...cat-24750.html