ChinaRiders Forums - View Single Post - CG250 Head

Megadan · 12-10-2017, 03:47 AM

I managed to get home for a day, but since I don't have my burrs in yet I decided to start with the comvbstion chamber.

I sanded down the machinist ridge around the valve seats, and blended them into the chamber. I also tried to smooth out the other ridges in the chamber. I definitely increased the chamber size a tiny bit, but I will mill the head a little more to compensate. The amount of area opened up around the valve at lower lift and the smoother airflow path should make a good difference.

Thise was all by hand, no power tools. Finished with 1500 grit for now. I will wait on the final polish until i get the reat of the head done.

The pictures don't do this justice. A lot more was removed than it seems. The first picture shows the ridge around the exhaust valve still in place for comparison.

12-10-2017, 03:47 AM	#71
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 8,034	I managed to get home for a day, but since I don't have my burrs in yet I decided to start with the comvbstion chamber. I sanded down the machinist ridge around the valve seats, and blended them into the chamber. I also tried to smooth out the other ridges in the chamber. I definitely increased the chamber size a tiny bit, but I will mill the head a little more to compensate. The amount of area opened up around the valve at lower lift and the smoother airflow path should make a good difference. Thise was all by hand, no power tools. Finished with 1500 grit for now. I will wait on the final polish until i get the reat of the head done. The pictures don't do this justice. A lot more was removed than it seems. The first picture shows the ridge around the exhaust valve still in place for comparison. Attached Images __________________ Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124 Last edited by Megadan; 01-13-2018 at 08:21 PM.
	3