Filter bolts?

[Arch stanton]

Hello.
Cb750k/Cb750f1 oil filter bolts.
Do they differ in length?
Sean.

[neat street]

looking at the K1 drawing and F1 the part Nos are the same 15420300020
info from CMSNI

[Arch stanton]

Thank you.
I thought they would be the same.
It just something that came up. Becuse ive struck a small oroblem fitting a oil cooler.
Sean.

[Bryanj]

Oil cooler will normaly have an adaptor plate held on with a steel "nut" that the standard bolt screws into. F2 had a longer bolt with a finned adaptor plate( no cooler hoses) that was supposed to keep oil a bit cooler

[ka-ja]

There is a longer bolt that allows an oil cooler to be fitted as I have both adapter and bolt sat in my garage, but I can't remember which bike the bolt was an original fitment for, but maybe not a Honda.

[Arch stanton]

Hello Bryan.
I have a Serek oil cooler from a F1 i had yonks ago.
But i have lost the bolt adaptor that hold the sandwich plate in place. So i have had one made.
But when the filter bolt is tightened, the filter housing is 10mm of the plate. I cannot make the female thread any deeper,
But i can shorten the thread on the bolt.
This is why i asked about bolt lengths.
Sean.

[Bryanj]

Sounds like that might be an F2 bolt, all the other 4's are the same so if you can get one of those to measure it would confirm it.

[SumpMagnet]

I got an F2 bolt I can measure if that helps. It's all apart right now...so the bolt is in the parts pile