Crankshaft

[Fast Fred]

bump

[2stroke4ever]

Wow

I have an Tohatsu 40 D.....

is the crankshaft so good? That i can turn the engine up to 8000 rpm?

[Roy Hodges]

those early Honda twins had both spark plugs firing at same time, they fired 180 degrees apart & then skipped one whole rev before it fired again. that's why they didn't shake & vibrate like the limey vertical twins . with the 180 crank , they were balanced , the English twins with a 360 degree crank couldn't have any decent balance .

[Fast Fred]

ow

I have an Tohatsu 40 D.....

is the crankshaft so good? That i can turn the engine up to 8000 rpm?

NO, 40C, is a twin.

[2stroke4ever]

i know... that the 40 C is a twin....

What is the limit of the crankshaft for my 40 D ? 6000 rpm or 6500 rpm?

THX for help!

[DonChichoJr.]

On Those Modular Cranks ( Tohatsu & Yammis ), What's The Maximum Tolerance, To Be Balance, Between The Center Bearing And The End Bearings ?

Any Trick To Be Easy That Work ??

Where Can I Get Info. ??

Thanks,
Don

[Fast Fred]

never did get one to holdup out side the revlimiter, on the Hot-Sue,
the yamaha was good till the 70hp carbs.

Hot-Sue pistons in your yamaha

120deg off number1 and so on, check it! .0005 of deflection, Tack, recheck deflection to.0005, you can get it that stright,
Done.

[Roy Hodges]

do you remember the Suzuki 750 triple two stroke motor sucker , er, murder cycle ? did it (the engine) have much in common with Suzuki outboard powerheads?

[Fast Fred]

had one of them thare bikes, from what i've seen gota say no, but kinda, but no.
yamahas and Hot-sues are updates of the 49 and 56 cuber.

[DonChichoJr.]

WHAT DO YOU MEAN WITH : 120 DEG. OFF # 1 .. . ????

THANKS,
DON