On their site it says that it will put your compression at 9:1. From what I learned about the ATC 90 that stock compression is 7.5:1. I emailed Dr ATV and he said that the big bore piston will be the same as stock compression. Does anyone disagree?
At The Back Of The Pack
Arm chair racerFirst time rider
On their site it says that it will put your compression at 9:1. From what I learned about the ATC 90 that stock compression is 7.5:1. I emailed Dr ATV and he said that the big bore piston will be the same as stock compression. Does anyone disagree?
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