motor questions

[shannon cone]

help...... iv put my new cylinder on and went out yesterday and the pisser wasnt pissing very much water after about 5 min of riding. went through all the lines and they weren't blocked. did a compression check and found it was low. took the head off and found blown head gasked.(brand new by the way). what i found was the sleeves are alittle lower then the cylinder deck. with a straight edge it wasnt flat eather. if i re-deck the cylinder will it bump up the compression to a unsafe amount. ii think roughly .005. what would be the max i could get away with if need be.

 

[SUPERTUNE]

Need more info...Did you use a OEM gasket? Is this a Yamaha or a Kawasaki? What engine? What has been done to the engine? What bore is it? What cc is the head your running? We could help if you were a little more descriptive and even a picture or 2, then you would really get responses!

 

[SUPERTUNE]

Generally, .005 off the top of the cylinder won't do much in the compression ratio department unless your already running very high compression ratio now. Squish clearance is more of a concern.

 

[shannon cone]

since it was in the superjet forum i figured people would know it was a superjet. i forgot to mention it was a 01 701. cyclinder is stock. i sent the head off to group k. they milled it and sent me the half girddle. put a protec modified cdi box in. has b pipe. come to find out the cylinder needed .009 of the top. well its all done now and picked it up tonight. my other question is dual cooling since group k put another fitting in the head. not sure how to route the lines. thanks. if i need to add more please let me know.
p.s the bor is one over and yes im running a factory head and base gasket.

 

[SUPERTUNE]

O.K., I forgot to look to see what forum page I was in... as I bounce all around and sometimes use the new post feature.
.009 should be ok off the cylinder as you are using a stock OEM sticky gasket, they are .052 crushed thickness, so even if the head had no squish lip and .010 off the cylinder I think you will be ok somewhere around .042-.048 I'm guessing.
Up the torque on the headbolts to 24 ft-lbs final torque. (16 first time)
Do a search for dual cooling and there should be lots of posts to route the lines.