they list the 906 at 79.5cc , thats the NHRA blueprint spec . measure what you ACTUALLY have , do not believe everything you read ...
Thanks for the great response! I guess you missed where I said they were RATED at 81.5cc but most I have actually TESTED were 85-86cc....?
Is there anybody HELPFUL on MoParts left anymore?
maybe you missed where i agreed they should be 1.000 , back away from the keyborad , put down the crackpipe and go measure them , they have probably been cut .