Honda CRF110F Custom Piston Kit

CJR Honda CRF110F Custom Piston Kit

The CJR Honda CRF110F Custom Piston Kit is available in bore sizes ranging from 50mm to 60mm, allowing you to customize your engine build to meet your performance goals. Stock crankcases accommodate up to a 55mm piston, while larger sizes up to 60mm require crankcase modifications and a compatible cylinder.

Piston Kit Includes: Piston, rings, circlips, and piston pin.

Available Options

Cylinder Head: 2V or 4V (4V requires a minimum 53mm bore).

Piston Design: Domed (higher compression) or flat top.

Bore Sizes:

50mm – 110cc
52mm – 118cc
53mm – 122cc
54mm – 128cc
55mm – 132cc
57.5mm – 155cc (with +4mm stroker crankshaft)
58mm – 147cc
59mm - 152cc
60mm – 157cc

Crankshaft: Stock stroke, +4mm stroker, or +10mm stroker.

Material: Cast or forged (Not available for ALL sizes)

Cast vs. Forged Pistons

Cast pistons generally offer reduced weight and less thermal expansion, while forged pistons provide greater strength and durability but typically require more clearance for thermal expansion.

CJR generally recommends cast pistons for the CRF110F due to their lighter weight and suitability for smaller-displacement engines.

Important Notes

Cast Piston Availability: 50mm, 55mm, and 60mm pistons are available in cast only.

Crankcase Compatibility: Bore sizes of 56mm and larger require crankcase modifications and a compatible cylinder.

Displacement Figures: Listed displacement figures are based on stock crankshaft stroke unless otherwise noted.

Custom Order – Quarterly Ordering

This product is available by custom order. CJR Performance places custom parts orders four times per year on the following schedule:

January 1 | April 1 | July 1 | October 1

Orders must be placed at least 7 days before the scheduled quarterly ordering date to be included in that cycle. Orders placed after the cutoff will be included in the following quarterly order.

Please Note: Quarterly ordering dates are not guaranteed shipping dates. Manufacturing, parts availability, and shipping times may vary.

Cancellation Policy: Custom orders may be canceled at any time before shipment for a full refund.

Disclaimer

NOTE - THIS IS AN AFTERMARKET PERFORMANCE PART BUILT FOR RACING PURPOSES ONLY. CJR IS NOT RESPONSIBLE FOR ANY DAMAGES CAUSED TO THE PARTS, VEHICLE, OR TO YOURSELF AND OTHERS. ENGINE PARTS ARE NOT UNDER WARRANTY NOR IS COLLATERAL DAMAGE OR COST OF LABOR, IN CASES OF MALFUNCTION.

AFTER AN ORDER HAS BEEN FULFILLED TO THE CUSTOMERS ADDRESS, IN THE EVENT OF A RETURN - A RETURN RESTOCK FEE OF 25% WILL BE ISSUED FOR ANY RETURNED KITS.