Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: Gv8power on September 26, 2017, 01:26:21 PM

Title: Main and big end bearings
Post by: Gv8power on September 26, 2017, 01:26:21 PM

Can anyone help . With what bearings I need for my Honda 500 . Letters of the crankcase AAABA , crankshaft 1A1A2A1A2A , con rod number 2 . Any help would be great thanks

Title: Re: Main and big end bearings
Post by: paulbaker1954 on September 26, 2017, 03:02:53 PM

I'm no expert engine builder (Trig your turn to weigh in !!) but.....

When I rebuilt my engine I plasti-gauged the existing shells and crank and given that they were well in spec they went back in. Have you done this already?

If you are changing the "correct" method is to measure the bores AND crank and then use the tables in the manual.

I guess there are some schools (Trig/Ash opinion here please) that say you can use the crank stampings as the bores shouldn't wear but you still need to measure the crank journals

I have attached the relevant page from the manual

Title: Re: Main and big end bearings
Post by: Gv8power on September 26, 2017, 10:36:11 PM

The crankshaft is fine the bearings are no good contamination

Title: Re: Main and big end bearings
Post by: Bryanj on September 27, 2017, 08:22:07 AM

Something wrong with the crankshaft details as there should be 5 letters and 4 numbers (or maybe other way round)

Title: Re: Main and big end bearings
Post by: Gv8power on October 13, 2017, 05:44:53 PM

Will check again tomorrow thanks