Click here for more performance options for your KX125
| $925 | We Modify your top end. |
| $150 | Exchange top end - Call for availability - Additional Charge |
| $ | "Bolt On" - Includes Cylinder, head, and power valves (prices vary by year) |
| $100 | Optional Xtreme coated head and piston |
KX134 Specifications: |
Fits 1999-Current KX125 |
| Bore: Yes | Stroke: No | Actual Displacement = 134.23cc |
| 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!
| $925 | We Modify your top end. |
| $150 | Exchange top end - Call for availability - Additional Charge |
| $ | "Bolt On" - Includes Cylinder, head, and power valves (prices vary by year) |
| $100 | Optional Xtreme coated head and piston |
KX139 Specifications: |
Fits 1999-Current KX125 |
| Bore: Yes | Stroke: No | Actual Displacement = 139.07cc |
| 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!
| $925 | We Modify your top end. |
| $150 | Exchange top end - Call for availability - Additional Charge |
| $ | "Bolt On" - Includes Cylinder, head, and power valves (prices vary by year) |
| $100 | Optional Xtreme coated head and piston |
KX144 Specifications: |
Fits 1999-Current KX125 |
| Bore: Yes | Stroke: No | Actual Displacement = 143.99cc |
| 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!
| $1950 | Send us your engine and get a 151cc big bore/ stroker kit installed. |
| |
| $100 | Optional Xtreme coated head and piston |
KX151 Specifications: |
Fits 1999-Current KX125 |
| Bore: Yes | Stroke: Yes | Actual Displacement = 150.55cc |
| 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 and stroker crank. 100 octane suggested for most conditions. |
| Crankshaft: | Stroked and balanced. |
| Crankcase: | Modified to clear stroker crank. |
| Blueprint: | Calculate deck height, squish clearance, trapped volume, port timing and compression ratio and list on your perminant Spec-Sheet. |
Notes: This kit requires you to send us your entire engine for modification with kick starter and shifter.
Notes: Prices listed are to install stroker kit parts in good condition engine. Should your engine need rebuild parts there will be additional charges. We will call for approval before we install any parts that will have additional charges. (example: rod kit, mains, main seals, trans parts)
Click Here to order this kit now!
| $2150 | Send us your engine and get a 167cc big bore/ stroker kit installed. |
| |
| $100 | Optional Xtreme coated head and piston |
KX167 Specifications: |
Fits 1999-Current KX125 |
| Bore: Yes | Stroke: Yes | Actual Displacement = 166.82cc |
| 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 and stroker crank. 100 octane suggested for most conditions. |
| Crankshaft: | Stroked and balanced. |
| Crankcase: | Modified to clear stroker crank. |
| Blueprint: | Calculate deck height, squish clearance, trapped volume, port timing and compression ratio and list on your perminant Spec-Sheet. |
Notes: This kit requires you to send us your entire engine for modification with kick starter and shifter.
Notes: Prices listed are to install stroker kit parts in good condition engine. Should your engine need rebuild parts there will be additional charges. We will call for approval before we install any parts that will have additional charges. (example: rod kit, mains, main seals, trans parts)
Click Here to order this kit now!