Depending on the year and head used they ranged anywhere from 9 to 1 all the way down to 7.6 to 1.
The stock compression ratio for a 2003 Yamaha YZ85 is approximately 8.6:1.
8.5 to 1 compression is factory stock.
ratio = 3.23
I'm assuming you mean static compression ratio. There were two 350 (5.7) engines offered by Pontiac. The standard engine was around 8.5 to 1. The HO version was factory rated at 10.5 to 1.
stock, 116 hp with a 2367 cc displacement and a 9.4:1 compression ratio.
11.3-1 stock piston with stock 3 layer base gasket
The stock compression ratio for a Suzuki QUV 620 is 10:3:1. Special spark plugs can increase that compression and the horsepower.
It is 8.54 ~ 10.12 :1
The stock compression ratio for a Can-Am Outlander 800 is typically around 10.8:1. This compression ratio is designed to optimize performance and efficiency for the ATV's Rotax engine. Modifications to this ratio can affect power output and engine behavior, so any changes should be made with careful consideration. Always consult the manufacturer or a professional when making modifications.
8.3:1 is stock
9:1.
8.5:1 stock