Yamaha Raptor 250
Advanced Machining Services Yamaha Raptor 250 performance page. A vast array of OEM and aftermarket parts for your Raptor 250. Head kits, Cylinder kits, Engine kits, seats and guides replaced, cams, valves and spring kits, multi angle valve jobs, oversized valves installed, porting, big bore head mods., cylinder boring/honing, big bore kits. Advanced Machining Services, Yamaha Raptor 250 crank rebuilds, transmission repair. Box it up and ship it.
Call for updated prices and quote.
Raptor 250 Cylinder Kits
Raptor 250 Cylinder Kit
- Clean & Hone cylinder
- Lap head gasket surface
- Wiseco Piston kit
- Top end gasket set
- Set ring end gap
- 11:1 high compression piston
- CYLINDER NOT INCLUDED
Raptor 250 Big Bore Kit
- Clean cylinder
- Bore to 76 mm
- Replate cylinder
- Lap head gasket surface
- JE Piston kit
- Set ring end gap
- Top end gasket set
- 10.5:1 or 12:1 compression piston
- CYLINDER NOT INCLUDED
Raptor 250 Big Bore 270 Kit
- Clean cylinder
- Bore to 77 mm
- Replate cylinder
- Lap head gasket surface
- CP Piston kit
- Top end gasket set
- Set ring end gap
- 11:1 or 12.5:1 compression
- CYLINDER NOT INCLUDED
Raptor 250 Valve Job Kits
- Disassembly and Assembly
- Clean
- Cut seats multi-angle
- Cut your stock valves
- Check guides and springs
- Lap head gasket surface
- New valve stem seals
- Cam removed and reinstalled
- Valve lash set
If we find problems with the valves, guides, or any other items during the disassembly/inspection, we will contact you with a corrective course of action. Add 2 Stainless steel valves to the kit call for a price.
- Stage 1.5 porting
- Intake matching
And as before this kit includes the above kit with the stainless steel valves plus:
- Stage 2 porting
- Intake matching
- Hotcam stage 1, 2, or 3 your choice
