SF crankcase stud lengths

piranha-bro2

piranha-bro2

Hero member
Location
Melbourne
I need to source the crankcase studs for my #1 SF motor but am a tad confused with the lengths I need.

Manual lists them but unfortunately doesn't specify where they go!

M6 x 68, M6 x 78
M8 x 110, M8 x 115, M8 x 120, M8 x 152, M8 x 157

But by trying to determine the lengths from my empty cases i can only seem to find:

M6 x 68 (4 x crank front, 2 x gearbox rear)
M8 x 110 (2 x gearbox (rear)
M8 x 120 (2 x crank starter side)
M8 x 157 (6 x crank centre and crank drive side drive, 2 x gearbox front)

Can anyone elaborate? Even just a measurement of the thread length at each end so I can get a better idea of fitted length (I know the case thread-end is longer than the nut thread-end). Any help appreciated. I'm about to order them.

Quentin
 
Quentin,

The 2 M8 studs at the front "corners" are a bit longer than their neighbours, they accept the lower fixings of  the factory crashbars. :D

Thread length into the alloy is approximately 15-18mm.

piet
 
Innaresting. Thanks Piet. As long as I have a workable setup then exact lengths aren't critical (eg I won't be fitting crash bars to it and I ain't counting rivets  :D  )
 
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