Crankshaft

[Wilf]

Hi guys.

dropped on a few engine bits today but was just wondering if anyone can tell me if a GS1000 crank is the same as an early 1100. I know the starter clutch etc is the same. Anyone enlighten me a little.?

cheers Wilf

[Swiss Toni]

If the 1100, over the 1000's capacity is gained by a longer throw, I'd say no, they're not the same. Possible easy way to find out is, go to Alpha Sports website, and compare part no's. 

[Wilf]

Thanks for that Toni, both have a 66mm throw so assume bigger Pistons. But will it go in?  Anyone else ever swapped 'em?

 

[Cheeky4648]

When you Say gs1000 and 1100 do you mean 8v motor or 16valve. 

Gs1000 8v has a 64.8 stroke the 1000 and 1100 16valve motors have 66.4 stroke. 

1100 16v cranks can be made to fit in a gs1000 it's a lot of work machining cases and such. Gs1000 into 1100 never heard it being done but anything is possible. 

[Wilf]

Thanks for that. So by that if it's a 16v crank, it's the same?

[Cheeky4648]

All 16v cranks were the same throw 66.4. All can be used in 16v cases. Hope this helps. 

If you have a 16v 1000 crank it must be from a katana with the good 493 rodz on it?

 

[Cheeky4648]

Just to add. A 16v crank is not the same as an 8v crank difference is in stroke and width of some of the crank webs. 

[Wilf]

Brilliant. Thanks guys. Looks like I might have dropped lucky then., set of wiseco pistons too. Roll on winter. 

Cheers again lads