NEW DESIGN Assassin-2 Cylinder Kit with a Steel Sleeve Bore Size of 66 mm (397cc)

This is the NEWEST DESIGN for the Assassin cylinders by Driveline Performance.

FEATURES:

• Steel sleeve bore that starts with a 66mm bore size (397cc).
• Cylinders can be bored to the next size and skip the Nikasil replating process. This cylinder kit is for people who do not want a Nikasil bore.
• Cylinders can be bored all the way up to a 68.25mm (424cc) diameter. This cylinder bore will utilize all the Blaster piston sizes (66mm through 68.25mm). 
• Same cylinder design as the 68mm 421cc cylinder with all the new upgrades to port designs.
• Port timing is at a moderate setting for any type of riding  style or racing. 

***THIS CYLINDER KIT MUST BE USED WITH A 4-MIL LONG ROD (115MM) CRANKSHAFT.*** 

PORT TIMING:

• Exhaust Port Timing: 194 Duration
• Transfer Timing: 121 Duration

THIS KIT REQUIRES THE USE OF A 9 or 10 DEGREE BIG BORE DOME: Driveline Performance includes a custom 22cc Big Bore Dome with the cylinder kit to match the 66mm bore size.

REQUIRED FUEL: Premium pump gas. 

CYLINDER UPGRADES (over Assassin-1 Cylinders): 

1. Intake tunnel roof has a smoother transition.
2. Boost ports were added to the intake.
3. The outside cylinder areas around the boost ports were filled in so boost ports can be made larger without breaking through. This extra material has caused the use of an ARP nut on the rear outside intake stud.
4. Transfer tunnels were made larger and now require the use of a CPI Cub base gasket. The internal bore side wall is rounded for better flow.
   
   1. Transfer divider rib is shorter and lower to allow fuel from the boost ports to reach the front transfer window easier. 
5. The outside of the cylinder around the transfer ports were extended to give more sealing area and more room if additional porting is desired. 
6. The front transfer window is angled for better flow. 
7. The exhaust port shape has changed for more area and flow. 
8. The triple ports are larger and the triple tunnel was increased in size to match.