Topic: intake adapters cb750f 1977

[chuter1]

     I hope someone can answer this for me. I am installing new boots on the bike and I removed the adapter that screws into the head. I cleaned the threads both on the adapter and the head also. NOW what do I use to seal the adapters back into the head? I could use copper neverseize but is there supposed to be some type of copper gasket or oring or what?      Thanks,    Allen

[seanbarney41]

you are not really supposed to take those out...I would use a healthy amount of loctite

[chuter1]

If I am correct loctite is only good up to about 300 degrees. I cleaned the threads inside and out and applied copper neverseize. Screwed them back in and should be good to go. If they have threads on them then why are they not removable, what if you broke one and needed to replace it?    Thanks,  Chuter

[madmtnmotors]

If they have threads on them then why are they not removable?

It would have been a manufacturing decision for speed and efficiency of manufacturing using the technology available in the 1960's.

What if you broke one and needed to replace it?

If I were to break one then I might start to question my engine building skills...    otherwise I would want to get to know a really good machinist and/or welder. 

I would wager that more of these intake spigots are damaged on removal than are damaged during normal use (or even during engine assembly) and are something of an "interference fit", similar to pipe threads from what I understand. Yes, they can be removed, but removing them just for the sake of removing them serves what purpose? 

I would have recommended thread sealer (or even red Loctite) over anti-seize and suggested that they never be removed again.