Adjust Valve Clearances On Work Bench

[tkent02]

There's plenty of room to work. So what's the point in the first place?

The hardest part of doing it on the bike is getting the valve cover off, so why bother?

[tone]

I can't see any benefit whatsoever to adjusting valve clearances on the bench. It would be pointless and possibly inaccurate. It could also be damaging -- as noted, the cam cap bolts are rather delicate, so the fewer stress cycles of taking them out and putting them in, the better.

I agree with this post :-D its a pointless exersise trying to do it with the head off, i just set the valves as i'm rebuilding the engine then throw the completed engine in & dont worry about it till the next service :-D

[psyguy]

regards re-tapping the bolt hole - as matchless has suggested OR - there are inserts made from mild steel that fit one into another - you drill (with a special tap) for 8mm insert that then takes a 6mm insert.

[Suzuki_Don]

I was just having a closer look at the holes and think you will have to approach an engineering concern to retap. I would first go to an automotive head rebuilder for an opinion.
It does not seem like something one will be able to do at home with ordinary tools. It should be repairable, but is going to open your wallet!

I was have arranged to take the head to a place in Sydney that does race car heads to have the valve seats recut, so they should be able to do whatever repairs are required. I will get a quote off them anyhow. Don't want to stuff the head up and be up for more money. I could normally do this myself, but the inserts that were put in before have been ripped out and left a mess.
Thanks Matchless