• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

D6 pony motor bearings/crank

Old Growth

Well-Known Member
Joined
Sep 30, 2019
Messages
214
Location
PNW
Crank shaft bearing sizes for D6 pony motor. It’s an opposed cylinder twin.

I’m looking for journal sizes.

Also looking for recommendations for a source for replacement bearings and piston rings.

The crank has spun one rod bearing. The good journal measures out at 1.875” and the spun journal is 1.870x1.850/oval.

What’s the largest oversized bearing that are available for the rods on these? I’m assuming the standard size is 1.875 since I could not find any oversized marking on the old bearing shells.

An .030 cut should clean this crank up as long as I can get .030 bearings.


Thanks in advance.
 

Attachments

  • AF6A130B-FA80-4ED3-8AD5-C46890EF1BF8.jpeg
    AF6A130B-FA80-4ED3-8AD5-C46890EF1BF8.jpeg
    1 MB · Views: 3

Old Magnet

Senior Member
Joined
May 11, 2010
Messages
2,014
Location
Corralitos, California
0.030 is the largest undersize
Check here...https://www.machinerytrader.com/parts/search?PartNumber=1H2784&SearchType=Start
1.8745 - 1.8750 is the standard rod journal size.
 
Last edited:
Top