yamaha 700 question please help

[buggzapper68]

i have a 2002 yamaha viper 700,i just had to replace two cylinders had them replated the third cylinder was ok and in specs,put 3 new pistons, rings, roller bearings. did compression check and got readings on the mag side 120,center 105,clutch 105.will these numbers go up as the rings seat? the motor only has about 30 miles on it.or should i be looking for something else

 

[mtnmodviper]

If you are using the stock head, I believe the vipers had staggered compression. I can't remember which cylinder was normally high, but I bet this is what you're experiencing.

 

[buggzapper68]

thanks

thanks for the answer,im wondering what the compression should be on a new rebuilt and one thats broke in and how many miles i should do the break in. thanks

 

[Disco Dan Richter]

your comp will increase, but i dont know if it will be that much.