I think I found the issue tell me what you think thanks for telling me to take the reeds out etr174 reeds looked great checked compression 105 on the left side and 85 on the right when I took the reeds out I looked at the cylinder and found the left in good condition and the right missing the whole intake bridge so I guess I found the miss thank a lot my next question is do I mill my stock head or buy a cool head because ill be going cub or serval pretty soon and are the vitos pistons any better than the regular wiesco pistons any help would be great this is the point I either wait to get the cub or just port the stockers and has anyone ridin the serval and the cub cause i want to know how bad the cub is in the tight stuff rarely woods ride but i think i can keep it clutched up enough to keep moving im used to riding 125s and 250s so it shouldn't be that big of a deal