perplexed:4 bolt flywheel in a 1275???

[jjrogers]

I have been quietly trying to get up to speed by reading all the great posts and advice on this site and now I need some input from the experts.

I have a 1275 that I picked up that is supposedly rebuilt (TBD) along with a ribcase tranny.

Everything externally points to this being a late '73 1275 unit as advertised; 12v/671ZL21959 engine #, AUD 502 carbs, 12g1361 head, etc.

I pulled the tranny and indeed a new clutch was installed with new t/o bearing etc. Everything looks nice including a newly resurfaced flywheel.

However, the clutch is the older B&B spring type, so I figure I will replace with the newer diaphram type and a lightened stock flywheel.

I was surprised to find a 4 bolt flywheel mounted. I pulled the flywheel and found only the 4 bolt and no positioning pins (plus the 6 mounting bolts on my other 1275 core).

Any ideas? Is it possible to install a 10CC crank in a 1275? Is there a chance this may have a performance component installed?

I will send pictures later but I welcome any thoughts you may have in the meantime.

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'68 Midget
'67 Saab V4
'71 BMW 2002

 

[spritenut]

Most likely the later 1098 crank in a 1275 block.
I know it works in Minis so why not Sprites?
It is a different stroke but the same 2" mains.

 

[jjrogers]

Would their be any performance reason to keep it this way or would I be better off replacing it with a stock crank?

Comments appreciated.

This is just for street use at this juncture.

I will be building a hotter engine in the future (through Hap if I can come up with the $).

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'68 Midget
'67 Saab V4
'71 BMW 2002