C11 Head

[bfr]

Ok so question for those who know... in the photo below (aslong as it came out) is 2 heads one on the left is off my c11.... blown head gasket made me remove it.... the one on my right is one of 2 i have as spares both bought as c11 and look kinda correct but different as can be seen.... I have matching barrells for all heads but where I have the prob is is the one on the right a c11 head?

Rocker gear is the same valves seem the same although I havn't removed to confirm left hand head has 6 fins right hand has 7 is it a later model head???

the other thing is the left hand head where the Trunnion bolts down ther has been 2 washers/spacers fitted to lift the Trunnion would this be normal???

any help please.... twas sposed to be a quick freshn up and on the road.... that was 4 months ago a rebuilt wheel,rewire,rebuilt forks and more to go and summer is drawing to a close.

[L.A.B.]

Rocker gear is the same valves seem the same although I havn't removed to confirm left hand head has 6 fins right hand has 7 is it a later model head???

The 7 fin head on the right would be from a later C11G or C12 model, I think.  

the other thing is the left hand head where the Trunnion bolts down ther has been 2 washers/spacers fitted to lift the Trunnion would this be normal???

Those spacers aren't shown in the C11 or C11G/C12 parts book illustrations.

[bfr]

Ahhh yes later model head would make sence the only problem i have now is the spacers... I couldn't find them in any parts brake down but was unsure.... the valves fitted seem to both be exhaust valves both ar marked ex i'm figuring that there the incorrect valves and stem length was a issue thats y the spacers were installed anybody know the correct length of valve a c11 used and the seat angle?

Cheers for the help.