[FR]

Nice stuff JB. I wonder what other heads you can service with that set. I'd guess there must be quite a few that have the same valve size.

FR

 

[FR]

You use the valve guide, ya fucktarded stewnod.

Hehe,

FR

 

[FR]

Sorry, it was the wine talking, but I hadn't used fucktard or stewnod in the same sentance, and since I knew the answer to the question I pretty much figured I was the man...
So yeah, JohnnyB, I was having a conversation with a dude out on the west coast about my XT500 head. He offered to do a "competition Valve Job", which he claimed was a 5 angle grind on the seats and 3 on the valve. This did not include any flow work, just the valve grinds and possibly guide work, for around 500 bucks if memory serves. I laughed so fast he started laughing too, but he was serious. What I was thinking at the time, was that there's no way I'd be able to percieve any difference in the power delivery of that engine whether it had 3 or 5 angle grinds. (it's a 2 valve head fer chrissakes)
All of which is to say, yeah, I think it'd be hard to tell the difference between valve jobs unless you do a real shitty job and actually lose compression because of a poorly ground seat.

FR

BTW, what do you do with your valves? Can you reface 'em or do you send 'em out?

F2editR

Edited by - FR on Jan 27 2006 09:15:07 AM

Edited by - FR on Jan 27 2006 09:17:28 AM

 

[FR]

I hear that. I hate to admit it but...for me, to take the head off an engine is a major job. I put my XT engine together and ran it for two seasons before I tore it back down again. (of course the nature of flattrack racing vs roadracing allows for that, to a degree)
Anyway, when I tore into this CB450 engine and head, I wasn't sure how much life was left in the valves after 13,000 street miles. I had my machinist bro do a valve job, and he was confident after grinding the original valves that they'd last another 13,000 miles or more under the same conditions. So I'd guess going with a superior material for the valve would really reduce the need to fuck with it every so often, as we tend to do.

FR