Bolts in the SIDE of the cylinder head?

[adidasguy]

Steel plugs in alloy??

Have you read some of the posts from people who have had problems with seized header bolts and the difficulties they have had?

I suspect they will be tapered plugs and depend on being very tight to make the seal. They are not intended to be removed, if they were they would be shown on the parts drawings and have a part number

Its your bike and your call but if there is corrosion there and the threads strip or pull out with the plugs.........you will be in a world of pain all on your own 

Hmmm interesting thoughts.I suspect they are simple grubscrew sized bolts with tapered contact surface to hold the pressure in.No big deal i think.However i will consider this for a bit

Some motors I have do not have allen bolts there.They are plugged with press in rods that you cannot remove. Case closed. Those are oil passage manufacturing plugs you do not touch.

[Ron888]

True but worth it in the end; the difference between stock jets and best main jet is night and day.

When i bought the bike it ran ok'ish i guess (??).Then after a while i noticed it was changing- it got a big rich spot when the throttle was wound right on. So now i have a smaller main jet and its running well. The weird part is why did it change all by itself?Or maybe i just didnt notice the rich spot at first- i'm sure this isnt the case)?

Anyways,whatever,its good now.Just trying some subtle changes to get it perfect . it's hard tho!I was trained on two strokes many years ago.Tuning four strokes isnt so easy! I think i have the main jet perfect now.I might try richening the needles a little and see how it feels
Jeez this is an awesome forum huh?The level of knowledge and the enthusiasm is great