GX120 vs. GX160 crank dimensions

[65ShelbyClone]

I know the 120's rod journal and flywheel taper are smaller; that's not a concern at the moment. What I would like to find out is whether a 120 crank will drop into a 160/200 case or if the width is narrower or the bearings smaller, etc. Does anyone have the dims for comparison?

 

[mmisterbungl]

If you don't find it before I get home tonight around 8pm CST, I have a genuine 200 crank I can measure.

 

[65ShelbyClone]

That would be good for verification. :thumbsup:

That's a 140 crank in my picture, BTW. It may be a little hard to read, but my calipers say 3.352" or 85.14mm. I'm pretty sure the 140 crank is the same as a 160(which will fit in a 200 block), just with a smaller flywheel taper. All I'm looking to do it verify whether a 120 crank will do the same. I know the cylinder heads all have the same bolt pattern...

 

[mmisterbungl]

 

[65ShelbyClone]

Thank you. :smile:

Dang, that's a lot different...

 

[65ShelbyClone]

Wait a minute, did you measure it across the governor gear or on the shoulder of the crank itself? My crankshaft has a shoulder that butts against the case bearing and stands up higher than the governor gear. Going just across the gear on mine gets 3.281".

 

[mmisterbungl]

yeah I didn't see that you measured off that shoulder. I will re-measure when I get home tonight

 

[mmisterbungl]

3.375"

 

[65ShelbyClone]

:thumbsup: