what cyl pressure should be?/?

The out side of the pan looks normal enough...

kzz1p wrote:

Ben thats good stuff!

Does the bike have a Yosh head on it? (the one with the small valve stems) or the lightened cam buckets?

I may be talking out of my butt here, but I'll take another compression guess:

10.5:1 piston with a intake valve timing of 26*/56*. I will say the compression should be in the range of 256 psi.

You could retard the intake cam to lower the pressure, but your performance will suck! and your power band will be raised, and bottom end power will suffer. Yes your L/C would be higher and your LSA would be higher.

Pretty much a set of cams made for racing. That's how they got the big dyno numbers.

When you check the numbers and find the running duration, I am guessing it will be appx 300*

As for the 56* of overlap, that's alot in a 1015 motor.

this makes sence....the last ride I went on I held it on in 3rd and it felt like it started to come on just ran out of rpm's...I'm going to make a ccouple of piston stops this week and get a wheel then we will know what the hell is going on

10.25:1, I will say 248 psi!

Can you see the piston domes, through the spark plug hole?
Just wanted to know if there pop-up's or now pop-in's? If I am anywhere close on the cylinder pressure, and it ran on pump gas. I have seen very high cylinder pressure motors, push the piston domes in, like they were hot butter?

Once again! I am guessing by long distance.

I dont think they are pop up pistons...I'll check

You are very welcome irishwill.

My 1075 with stock cams was 185-190 across the board.

i leave town for a few days and miss all the fun! :laugh:

PLUMMEN wrote:

i leave town for a few days and miss all the fun! :laugh:

somthin' tells me fun is not something you miss out on often;-)

I'm getting a buddy to buzz me up a piston stop ...so as soon as I get it I will share some more....
And I have decided to sell this to someone who will keep it the way it is ...Dale from down under has dibbs...

the pressure was too much from everyone to keep it "stock"
so I will mess with another one instead