Click here to see additional performance options for your YZ 250
| $900 | We Modify your top end. |
| $975 | Exchange top end - Call for availability |
| $1826 | "Bolt On" - Includes Cylinder, head, and power valves |
| $100 | Optional Xtreme coated head and piston |
YZ265 Specifications: |
Fits 1999-Current YZ250 |
| Bore: Yes | Stroke: No | Actual Displacement = 265.34cc |
| Engine Modifications Required: | |
| Cylinder: | Bore, Port and Replate with Apticote 2000 ceramic bore coating. |
| Power Valves: | Machined to match big bore ports. |
| Head: | Rechamber to work with the Big Bore piston. 100 octane suggested for most conditions. |
| Crankshaft: | No crank mods required. |
| Crankcase: | No crankcase mods required. |
| Blueprint: | Calculate deck height, squish clearance, trapped volume, port timing and compression ratio and list on your perminant Spec-Sheet. (Some operations with install only) |
Notes: This kit requires you to send us your cylinder, head, and powervalves for modification.
Notes: Core parts subject to inspection before credits will be issued.
Click Here to order this kit now!
Click Here to read the 2007 MXA YZ285 Review
| $900 | We Modify your top end. |
| $975 | Exchange top end - Call for availability |
| $1826 | "Bolt On" - Includes Cylinder, head, and power valves |
| $100 | Optional Xtreme coated head and piston |
YZ285 Specifications: |
Fits 1999-Current YZ250 |
| Bore: Yes | Stroke: No | Actual Displacement = 285.06cc |
| Engine Modifications Required: | |
| Cylinder: | Bore, Port and Replate with Apticote 2000 ceramic bore coating. |
| Power Valves: | Machined to match big bore ports. |
| Head: | Rechamber to work with the Big Bore piston. 100 octane suggested for most conditions. |
| Crankshaft: | No crank mods required. |
| Crankcase: | No crankcase mods required. |
| Blueprint: | Calculate deck height, squish clearance, trapped volume, port timing and compression ratio and list on your perminant Spec-Sheet. ((Some operations with install only) |
Notes: This kit requires you to send us your cylinder, head, and powervalves for modification.
Notes: Core parts subject to inspection before credits will be issued.
Click Here to order this kit now!
Max Power Inc. offers the largest selection of big bore kits for motorcycles and ATV's anywhere. Max Power is the home of the Ice Cube cylinder. Max Power has big bore and stroker kits available for both 2 stroke and 4 stroke engines. We are also your one stop engine performance shop selling stock displacement performance modifications, high compression pistons, Hot Cams, Web Cams, big bore kits, Hot Rods stroker crankshafts, Rossier exhaust systems, Jardine exhaust systems, Leo Vince exhaust systems, Wiseco pistons, CP Pistons and Cometic gaskets. Max Power Inc. also offers full service cylinder head work including porting and oversize valves from Xceledyne and Kibblewhite. Max Power is one of only 4 companys in the US that has a true in-house cylinder plating facility. Max Power can plate your cylinder with nickel silicon carbide called Apticote 2000, Max Power offers cylinder porting, head modifications, 2 stroke big bore kits, Stroker engines, supermini mods and is the only company that makes the YZ167. 2 Stroke and 4 stroke stroker crankshafts and crankshaft balancing are available too.