NEW BBR Bore Kit - 95cc XR/CRF80, 79-13

BBR introduces the first complete big bore kit for the CRF80 (and XR80)! Our new bore kit includes the cylinder making for a quick and easy upgrade. It features a 52 mm high compression piston resulting in a displacement of 95.6 cc. This kit includes the head gasket, base gasket, and intake gasket. 10.0:1 compression ratio lets it run on pump premium gas. As for all BBR bore kits, we recommend using enthanol free gasoline (see www.pure-gas.org).Works with stock camshaft and valve springs or optional BBR performance camshaft (part number 411-HXR-1020 listed in Optional Parts below). OEM Kehin PC18/20 carb works great with minor rejetting. 52 mm piston 95.6 cc displacement 10.0:1 compression ratio Includes new aluminum cylinder, piston, rings, pin, clips, head and base gaskets Fits CRF/XR80 model years 1979 - 2013 Works with BBR CRF/XR100 camshaft (see optional parts below) or OEM camshaft BBR General Jetting Guidelines ChartStock XR/CRF80 - 47.5mm bore, 45.0mm stroke

NEW BBR Bore Kit - 95cc XR/CRF80, 79-13

BBR introduces the first complete big bore kit for the CRF80 (and XR80)! Our new bore kit includes the cylinder making for a quick and easy upgrade. It features a 52 mm high compression piston resulting in a displacement of 95.6 cc. This kit includes the head gasket, base gasket, and intake gasket. 10.0:1 compression ratio lets it run on pump premium gas. As for all BBR bore kits, we recommend using enthanol free gasoline (see www.pure-gas.org).

Works with stock camshaft and valve springs or optional BBR performance camshaft (part number 411-HXR-1020 listed in Optional Parts below). OEM Kehin PC18/20 carb works great with minor rejetting.


  • 52 mm piston
  • 95.6 cc displacement
  • 10.0:1 compression ratio
  • Includes new aluminum cylinder, piston, rings, pin, clips, head and base gaskets
  • Fits CRF/XR80 model years 1979 - 2013
  • Works with BBR CRF/XR100 camshaft (see optional parts below) or OEM camshaft


BBR General Jetting Guidelines Chart

Stock XR/CRF80 - 47.5mm bore, 45.0mm stroke


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Immediate payment is required upon selecting "Buy It Now" or upon checking out through the cart.

We accept payment via U.S. PayPal accounts and all Major Credit Cards, Debit Cards & Google Pay.

We are legally required to collect sales tax in those states and localities where we maintain a physical presence (nexus).

The applicable amount of sales tax charged to an order will be calculated based on the shipment destination's state and local sales tax laws.

Thank you for shopping with us on eBay!

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