Topic: sourcing stock rings for 77/78 CB750F motor.....

[J.Webster Designs]

hey guys... I am trying to help out those that have the dreaded F2 motors that can not find stock rings.... unfortunately i do not have my motor torn down nor do i have a spare F motor to measure things.... Can anyone tell me what the bore size, and ring sizes of the F2 motor? i may have tracked down a source but need these measurements to see if they have them...

[nobody]

subscribing

[J.Webster Designs]

anyone think they can help out with those measurements?

[super pasty white guy]

do a search on the board for total seal rings.  I'm pretty sure that I saw dimensions in that thread.

spwg

[kos]

Of course the bore is 61mm. Here are the dimensions of the two upper rings, thickness 1.20mm  and 3 piece oil ring assembly thickness is 2.75mm.

I do have a set of 4 these in .050"  2nd over, if you want to grind down end gaps.

KOS

[J.Webster Designs]

these arent for me as i will be doing a big bore kit and K cylinders and head swap by the time that i re-build my motor.

Just trying to help out the fellow F2 guys....

[Jerry Rxman Griffin aka MuthaF'er]

Here's a start. Total Seal. Give Ed a call and see if he can help. He's GOOD!

http://totalseal.com/

Hastings. This listing is the early K's and 75 F's

Note: the CB350 twin is also the Yoshi 810

http://www.hastingsmfg.com/RingFinderMasterDetails.aspx?AppMACD=HONDMTRC&AppMOCD=HONDA Motorcycles&AddText=

[MRieck]

The OEM part# is on the forum somewhere. I know this because I needed sets about 3 years ago and somebody posted them. The part # is for the 77/78K I believe