Stock Superjet Cylinders ???????
- Thread starter iptamenos
- Start date
- Location
- Goleta, CA
Group k has this to say:
The maximum diameter limit of the stock sleeve is 84.5mm. Given this, we opted to bore to 84.0mm to allow us room for later over-boring (84.25 & 84.50). While the base sleeve (that sticks out of the bottom of the cylinder casting) gets very thin, it is still stable enough to endure the operation of a 7200-7300 rpm engine. One nice side effect of boring the stock sleeves to 84mm is improved cooling (a result of the shorter “steel” heat path from the piston to the aluminum casting).
Check their web site. http://www.groupk.com/restof800sj.htm
The maximum diameter limit of the stock sleeve is 84.5mm. Given this, we opted to bore to 84.0mm to allow us room for later over-boring (84.25 & 84.50). While the base sleeve (that sticks out of the bottom of the cylinder casting) gets very thin, it is still stable enough to endure the operation of a 7200-7300 rpm engine. One nice side effect of boring the stock sleeves to 84mm is improved cooling (a result of the shorter “steel” heat path from the piston to the aluminum casting).
Check their web site. http://www.groupk.com/restof800sj.htm