03 Head & Valve Pics @ 37k miles

[03HiYoSilver]

I thought some would like to look at the head/valves of a FJR with 37k miles.

Mind you, I don't think mine falls in the Normal category since it always seemed to run rich, even after the head replacement. I have had it for about 10k miles and only run top tier gasoline and usually 93 octane. My next step is to probably install RIVNUTS to test the CO balance across all four cylinders so it won't look like this again.

Exhaust valves on the Left side - Intake on the Right

Exhaust valves on the Left side - Intake on the Right

Top of Head w/o Cover

Combustion Chamber View

 

[fjrinbc]

OK, I'll bite......

Why did you take/have it taken apart? Tick repair.....or just curious?

What does "plug in combustion chamber" mean?

Exhaust ports for cylinders no. 2 (1 of them) and cyl 4 do look extra carbon-ish.

Me thinks your "exhaust valves on left, intakes on right" is backwards.

 

[v65]

What does "plug in combustion chamber" mean?

He's just pointing out what it is.

Me thinks your "exhaust valves on left, intakes on right" is backwards.

Must be British.

 

[03HiYoSilver]

V65 is correct.

This is a post ticker fix and the head is the original that was replaced.

I am not sure which is carbon from being too rich OR from the Oil that bypassed the valve guides into the combustion chamber.

Frankly, I think they look pretty good (less the carbon or oil effect) for a bike with 37k miles.

I thought some would like to see what it looks like with the head off the bike.