[IGeeky1]

So I'm having an machine shop check out the engine, he said he hadn't looked at it ye t but I may need a new exhaust valve. So this is just speculation and curiosity at this point.

But I look here Honda Motorcycle Parts 1987 VT1100C A FRONT CYLINDER HEAD Diagram and do not see any valves or valve springs shown. I also checked other areas but it seems to me they would be here.

Are valves and valves springs not purchasable? I mean, I hope not to need them anyway but I'm finding this rather odd.

 

[cyclejohn]

Honda Motorcycle Parts 1987 VT1100C A CAMSHAFT Diagram


Listed under Camshaft.

 

[IGeeky1]

OK, kinda feeling dumb for not making that association...THANK YOU!

 

[swifty2014]

Maybe a compression test would be a safe bet to verify the problem.

 

[IGeeky1]

Compression test is what prompted me to rip out the engine, disassemble and take to machine shop. Cylinders were out of round and out of spec and one had a scratch large enough to allow blow-by

 

[swifty2014]

valves can usually be ground to get them back into specs if there is enough material left for proper margin and if the valve is not burned or bent, etc.

 

[7xclm]

^^^^^^^^^ Yup. As long as the seat is ok.

 

[IGeeky1]

fsm says do NOT grind valves, replace if needed. Why? why not grind?

 

[swifty2014]

I did a lot of valve work on foreign cars and they were able to be ground if still thick enough. A least some years ago. But maybe bikes have thinner valves and not able to remove metal and still be within specs. I don't know.
The later cars with 4 valve per cylinder have some very small valves with little skinny valve stems.
Almost look like working on a Briggs lawn mower engine.