Honda CB750 Sandcast

The Restoration Shop => Engine Mechanical => Topic started by: slyguy on January 31, 2023, 03:18:36 pm

Title: Which crankshaft bearings(mains)
Post by: slyguy on January 31, 2023, 03:18:36 pm

  I don’t understand, I have AAAAA on case & AABBA on crankshaft… Thanks for any input:)

Title: Re: Which crankshaft bearings(mains)
Post by: kp on January 31, 2023, 04:29:05 pm

You need a workshop manual

Title: Re: Which crankshaft bearings(mains)
Post by: Wayne on February 01, 2023, 09:58:45 am

Ditto what KP said however here’s a post that might help you.

http://cb750sandcastonly.com/smf_forum/index.php/topic,519.msg3424.html#msg3424

Title: Re: Which crankshaft bearings(mains)
Post by: Sam on February 05, 2023, 10:47:53 pm

The short answer is that those codes were relevant in 1969 when the engine was being built, but are not relevant now after many miles and years.

You need to use green plastigauge and figure out what bearings will give you the proper clearances. The place to start is usually green if you are unsure of what you have now.

You MUST get a shop manual. NOT an aftermarket manual. Only the original Honda manual (green cover) will do!

Good luck!