150/155/160/170, 2 valve, High compression head. Stock tuned. KLX KSR port compatible
Fits both YX and Z155 engine
Please note you will need YX covers if you are fitting to Z155
Will work with 32T & 34T cam sprockets provided you have the correct crank
KSR exhaust port with M8 threads
Inlet is the 10 degree slanted back type
Complete head from OORacing with new small combustion chamber for a better compression ratio.
2 x Rockers and shafts
1 x Cam shaft 7mm lift stock duration upgrade non decompressor type.
1 x Valve spring set with top caps
1 x Inlet valve 28mm
1 x Exhaust valve 23mm
Cam sprocket not included
Valve clearances are pre set but will need checking when head has been fitted
This head is a direct bolt on for the YX 150/160/170 and Z155 2 valve engines