Banshee compression check

[Don29palms]

How much psi of compression should a stock Banshee have?

[80grit]

How much psi of compression should a stock Banshee have?

Ill check my manuel in the morning but i think its around 145 psi if it is completely stock.

[Don29palms]

My manual says Yamaha doesn't list specs but each cylinder should be within 10% of each other. One cylinder is 125 and one is 120 but is that enough?

[80grit]

My manual says Yamaha doesn't list specs but each cylinder should be within 10% of each other. One cylinder is 125 and one is 120 but is that enough?

Thats within 10% of each other. It sounds a snitch low but it sounds like the rings are wearing evenly on both cylnders. I read on Alba's web site that they like to shave the head and run there stock banshees at 155-160 psi.

Most of my freinds running their ported, polished, and bored banshees run around 175 psi. But they are changing their dome size to get there.

Ill call a freind today who knows this stuff inside and out and see where you should be on a complete stock banshee and repost tonite.

[EY3BA11]

i wannnnnna say in the 155 neigborhood but dont hold me to it

[80grit]

I checked with my freind and he said stock banshee & stock head that has not been milled that 120-125 psi is where it should be...Not to worry

[superdave]

altitude makes a difference. stock at sea level is about 130. here in vegas 118. my top end is fresh with 18cc domes and is at about 150. i would say you are just fine don.