SOHC.co.uk Forums > CB750

f2 rebuild...help...

(1/2) > >>

whiteylfc:
Can anyone help?..I took apart a 26k mile cb750 engine in my Phil Read Replica and had the crankcases bead blasted. ...now it's going back together I can't remember whether there should be any of the 3 semi circular clips (?)on the 3 bearings on the main shaft to the drive sprocket.There is a groove in the top and bottom crankcases.secondly...when I finally put the 2 crankcase halves together,should I put any bonding on the joints?I don't remember their being any when I split the crankcases...many thanks John white

K2-K6:
The manual shows three location semi circular collars fitted to the top of the gearbox mainshaft, this is fitted into the top crankcase with it upside down and then the bottom case placed onto it for assembly.
They use a sealant between the cases,  there's differing opinions as to which is the best choice. Someone may be able to offer a current choice to help you.

adriangsmith:
threebond works well. Ive used it on 2 engines so far and had no leaks or weeps.

whiteylfc:
COLLARS.....I couldn't think of a word to describe them..!!I could see them on exploded diagrams on the Internet but couldn't work out why there would be a groove in the lower crankcase half is something didn't go into it.I bought and stripped another f2 engine and I don't remember that having any collars in it which is what threw me.Is Honda bond any good?    Many thanks

Trigger:
I call them Half Rings  ;) Should fit in the casings and early 750's had 5 of them, 2 being on the final drive.

Navigation

[0] Message Index

[#] Next page