head removal

[chef1366]

It's gotta be winter. :?

[Pete Logan]

It's gotta be winter. :?

Yeah :-D

I know from the drag boys that a little water sprayed into the intakes can help stave off detonation, and there was a guy in UK about 40 years ago who patented a device that sprayed a little water into carb throats which gave better running - I guess all of us have noticed that carb engines run noticeably better in cold, damp conditions.

I also know that a little water sprayed into the carb is an old school mechanic's trick to help break up carbon deposits in the chamber.

I just meant don't hose the stuff in there. I have a piston from a 2-stroke go-kart engine that vividly demonstrates the effect of too much water in the fuel. The kid broke 3 pistons in one afternoon before they figured out what was causing it.

[catbed]

well im about to take the head off because the valve's clearance is somewhere around .4 millimeters, not .04. i tapped the shim, scraped some carbon off, and sprayed sea foam in it. no luck

[tkent02]

[QUOTE=catbed;746699]
well im about to take the head off because the valve's clearance is somewhere around .4 millimeters, not .04.
QUOTE]

Need shims?

[TheCafeKid]

Not to but into this thread, but this kinda goes along with what he's doing, so maybe it will be helpfull to him as well. I was checking my clearances on that motor i picked up off ebay. Intake side was all tight, so tight in fact the only one i could get into spec (due to the shims i had available at the time) went from a 2.80 to a 2.65. Exhaust were all within spec save for one, and i had the shim to fix that. Anyway, with all those intake valves being that far out of spec, it makes me worry about burnt intake valves. I looked down thru the plug hole to see what i could see of the intake valve and it didnt look cooked, the piston crowns are all a lil bit carboned but thats to be expected, especially considering based on the look of the plugs i pulled out of it and the smell of what oil was left in it, it had been running rich.

Here's my question, is there a way with the motor out of the bike, and NOT pulling the head, to tell if the intake valves are cooked?

[catbed]

i was worried about a burnt intake valve too, but i couldnt determine if i had a burnt valve. i pulled the head and i dont have a burnt valve. i dont have a spring compressor though so i cant clean them right now.