G80/85CS cylinder heads
6 posts
• Page 1 of 1
G80/85CS cylinder heads
Hi
For the 1960 season, combustion chambers were reworked for G80, G80CS and 500/650 twins. For 1964, the G80CS cylinder head was reworked again (026702 -> 031623).
I have seen pictures of the later one - there are some changes to the casting in the spark plug area - but what are the finer points? The late number indicates this was a modification made for the G85CS works machines at first.
Was the firing slot finally abandoned and a 10mm plug fitted?
Cheers,
Knut
For the 1960 season, combustion chambers were reworked for G80, G80CS and 500/650 twins. For 1964, the G80CS cylinder head was reworked again (026702 -> 031623).
I have seen pictures of the later one - there are some changes to the casting in the spark plug area - but what are the finer points? The late number indicates this was a modification made for the G85CS works machines at first.
Was the firing slot finally abandoned and a 10mm plug fitted?
Cheers,
Knut
Re: G80/85CS cylinder heads
Here are pictures of a 58CS and 64CS heads. I have two other heads similar to the 64CS, one off a 1968 G80CS and one off a G85. They all use 14mm plugs.
regards
Bjørn
You do not have the required permissions to view the files attached to this post.
Re: G80/85CS cylinder heads
'64 and later had 1 3/8 inlet port standard and inlet valve has 5/16 stem also
- ajscomboman
- Member
-
- Posts: 3275
- Joined: Mon Jan 01, 1990 12:00 am
- Location: HAMPSHIRE UK
Re: G80/85CS cylinder heads
Marty, you made any progress with the CS issues you were having?
Re: G80/85CS cylinder heads
Different Marty. You are after the Australian, not the Kiwi. As an aside, I attended the Oz Jampot at Boonah, Qld. Met Marty and his problem children. I think he is very close to having both sorted, or as close as one can.
- ajscomboman
- Member
-
- Posts: 3275
- Joined: Mon Jan 01, 1990 12:00 am
- Location: HAMPSHIRE UK
Re: G80/85CS cylinder heads
Marty wrote:Different Marty. You are after the Australian, not the Kiwi. As an aside, I attended the Oz Jampot at Boonah, Qld. Met Marty and his problem children. I think he is very close to having both sorted, or as close as one can.
Of course it is, sorry I should have realised by the way you're still beating that bloody animal!!!!


Still it's nice to hear that progress has been made.

6 posts
• Page 1 of 1
Return to Competition / Racers
Who is online
Users browsing this forum: No registered users and 2 guests