ChinaRiders Forums - View Single Post - Contemplating milling the CG head .030 to raise compression

herbie · 10-25-2019, 07:38 PM

I started working on my spare head and it looks similar to yours Dan. I tried to deck it thirty thousands off. I didn't do much to the combustion chamber other than buffing it out. I ported and polished the exhaust port and left the intake port alone. I may revisit the intake port if I don't like the performance but I'm thinking it will give me what I want the way it is now. Since this is a counterbalanced engine the one difference I found is in the head gasket. The oem one is thinner than the xmoto gasket I bought, so I ordered one from CSC. Mine also doesn't have the one O-ring on the stud like yours in your video.

10-25-2019, 07:38 PM	#18
herbie Join Date: May 2019 Location: Illinois Posts: 864	I started working on my spare head and it looks similar to yours Dan. I tried to deck it thirty thousands off. I didn't do much to the combustion chamber other than buffing it out. I ported and polished the exhaust port and left the intake port alone. I may revisit the intake port if I don't like the performance but I'm thinking it will give me what I want the way it is now. Since this is a counterbalanced engine the one difference I found is in the head gasket. The oem one is thinner than the xmoto gasket I bought, so I ordered one from CSC. Mine also doesn't have the one O-ring on the stud like yours in your video. Attached Images __________________ 2022 Venom KPR 200 Red- the fastest color 16t and 46t sprockets, NGK Iridium CPR8EAIX-9, aftermarket full exhaust system. Top speed 81GPS 2023 Venom SS3 KP mini 150– Nibbi carb, Nibbi air filter, aftermarket muffler, decat 2022 Venom Ghost chopper 250 1997 Honda GL1500 Goldwing 1978 Kawasaki KL250 https://youtube.com/@herbiesgarage681 Last edited by herbie; 10-26-2019 at 09:55 AM.
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