![TB Stock Head, 88cc Bore Kit – Z50/ XR50/ CRF50 [1988+], Z50/ XR50/ CRF50/ [1988+] Engine](http://ocppartswarehouse.com/cdn/shop/files/928-1000x858_490x@3x.webp?v=1764359850)
TB Stock Head, 88cc Bore Kit – 1988+ Models
– Lightweight aluminum cylinder with steel sleeve
– Cast in mounts on cylinder for aftermarket skid plates
– Oversized cooling fins on cylinder for efficient heat dissipation
– High compression 52mm piston with rings, pin, & clips
– Head gasket kit
We recommend purchasing a high volume oil pump kit (available in this section).
Installation Note: It will save a lot of time and effort if the oil pump is installed while installing the bore kit (requires cylinder removal).
OCPPARTSWAREHOUSE is not responsible for late deliveries outside of our control. Severe weather, carrier issues, pandemics, natural disasters, etc.
Orders over $75.00 qualify for free shipping.
Orders under $75.00pay a flat shipping rate of $10.95 Offer only applies to 48 contiguous states. Hazardous Materials ship UPS Ground only.
Orders that contain backorders, the order will be held until all parts are in. A customer representative will reach out to you if this is the case. At that time a decision can be made whether or not to split the order.
Alaska orders will be charged a flat $35 charge and will be shipped Post Office Priority Mail. We do not ship Oversized mail to Alaska.
Hawaii orders will be charged a flat $35 charge and will be shipped Post Office Priority Mail. We do not ship Oversized mail to Hawaii.
Puerto Rico orders will be charged a flat $35 charge and will be shipped Post Office Priority Mail. We do not ship Oversized mail to Puerto Rico.
![TB Stock Head, 88cc Bore Kit – Z50/ XR50/ CRF50 [1988+], Z50/ XR50/ CRF50/ [1988+] Engine](http://ocppartswarehouse.com/cdn/shop/files/928-1000x858_60x@3x.webp?v=1764359850)