1. Resurface all ports for better gas air mixture
2. Modify transfer ports for better flow
3. Enlarge and reshape exhaust port
4. Exhaust timing raised to">
(Our porting is not shown in picture)
This is a brand new race ported 28. 5cc G290RC 4 bolt top end. This kit comes with a hand ported G290RC cylinder, piston, ring, wrist pin, c clips, spark plug, needle bearing and base gasket. The following port work has been done:< p>
1. Resurface all ports for better gas air mixture
2. Modify transfer ports for better flow
3. Enlarge and reshape exhaust port
4. Exhaust timing raised to">
(Our porting is not shown in picture)
This is a brand new race ported 28. 5cc G290RC 4 bolt top end. This kit comes with a hand ported G290RC cylinder, piston, ring, wrist pin, c clips, spark plug, needle bearing and base gasket. The following port work has been done:< p>
1. Resurface all ports for better gas air mixture
2. Modify transfer ports for better flow
3. Enlarge and reshape exhaust port
4. Exhaust timing raised to">