Mini Bikes - Honda - XR100 - 1990-2009 115/125cc Yoshimura Racing Cylinder Head Kit SKU:257-406-2000  E-mail this product to a friend CALL TO ORDER (909) 628-4722 (800) 634-9166
For Closed Course Competition Use Only. Not Intended for Street Use.

Description

If you have to have the best, here it is. Add our Yoshimura 115/125cc Cylinder head kit to the stroked big bore engine and you create a power monster. This kit works with either the 115cc engine combination or the stroked 125cc engine combo. The Cylinder head kit comes with the ST-1 cam and a whole lot more- basically combine the Big Bore Kit, the Crankshaft, with the Cylinder Head kit and you have a fire breathing pure racing engine equipped XR/CRF/NSF 125cc that will take on all challengers.
Note 1: The Cylinder head Kit comes with the ST-1 Camshaft.
Note 2: For best performance, it is recommended to use a 26mm TM MJN Carburetor P/N 770-409-1000
Note 3: Takegawa oil pump kit must also be used for 125cc kitted machines. P/N 01-16R-0061 available from Yoshimura or Takegawa direct.

XR/CRF/NSF 125cc Kit Includes:
(Racing cylinder head can only be used with Yoshimura 125cc modified engine)

• Complete Yoshimura Racing Head with larger valves
• Metal head gasket, Hi-compression head gasket
• Includes cotters, retainers and valve springs
• Die cast Yoshimura generator and Tappet covers
• All necessary installation hardware and instructions
• Yoshimura ST-1 Billet Camshafts
• 12.3:1 Compression Ratio

Optional Parts:

• 12.91:1 Compression ratio gasket (293-506-5700)
• SPL Racing Clutch Kit (311-406-0000)
• Cam tensioner assist kit (214-406-1000)
• For NSF- Aluminum manifold, straight (704-489-1100)
• Oil Cooler (Generic) (777-009-1200)