Pro-X

ProX Piston Kit Cast Piston - Kawasaki KX85 2001-2013

$99.95 USD

~~$99.95 USD~~ $99.95 USD

Sale Sold out

Size 48.45 mm 48.46 mm Wrist Pin Bearing

Year KX85 01- 10 KX85/KX100 01-24

ProX A & B Piston Kit Set (3-Piece Performance Kit) - Kawasaki KX85 2001-2013

Product Description

This package delivers three complete ProX piston kits covering A (48.45 mm), B (48.46 mm), and C (48.47 mm) sizing for the Kawasaki KX85. Built for targeted cylinder matching and scheduled rebuild cycles, this set gives you the exact incremental bore sizes needed to maintain cylinder clearance over time in one box with zero guesswork.

Manufactured in Japan from a high-silicon-content aluminum alloy, each piston is cast and CNC-machined to close tolerances to meet or exceed original equipment standards. Each individual box includes the piston, dedicated ring kit, wrist pin, and circlips so every top-end rebuild has fresh, matched hardware ready to install.

What's Included in This Kit

Qty	Brand	Part Number	Item Description
1	ProX	01.4121.A	Piston Kit - 48.45 mm (Size A: Piston, Ring Kit, Wrist Pin, Circlips)
1	ProX	01.4121.B	Piston Kit - 48.46 mm (Size B: Piston, Ring Kit, Wrist Pin, Circlips)
1	ProX	01.4121.C	Piston Kit - 48.47 mm (Size C: Piston, Ring Kit, Wrist Pin, Circlips) Out - Stock

Why Buy the Complete Kit?

Every part matched to your exact bike - no cross-referencing part numbers
One order, one box, one shipment - everything arrives together
Nothing forgotten on service day
Backed by Moto-House MX customer service before and after the sale

Get all three graduated piston sizes in a single order to handle top-end maintenance across the life of your cylinder.

Top Benefits: ProX A, B & C Piston Kit Set

Manufactured in Japan from high-silicon-content aluminum alloy
Precision CNC-machined to close tolerances to match factory cylinder specifications
Complete top-end hardware: each kit includes matched piston, rings, wrist pin, and circlips
Incremental 0.01 mm sizing (48.45 mm, 48.46 mm, 48.47 mm) allows exact piston-to-wall clearance matching as the cylinder wears

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Sub-Model
2001-2013	Kawasaki	KX85

Frequently Asked Questions

Q: Why does this package include A, B, and C pistons?
A: Kawasaki KX85 plated cylinders experience gradual wear. ProX manufactures pistons in 0.01 mm increments (A = 48.45 mm, B = 48.46 mm, C = 48.47 mm) so you can match the piston diameter directly to your measured cylinder bore without re-plating.

Q: Does each individual piston kit come with wrist pins and circlips?
A: Yes. Every individual ProX kit in the package includes the piston, ring set, wrist pin, and two circlips.

Q: Is top-end gasket hardware or a wrist pin bearing included?
A: No. This set contains three complete piston kits (pistons, rings, pins, and circlips). Top-end gaskets and small-end wrist pin bearings must be purchased separately.

Expert Pro-Tip: Always measure your KX85 cylinder with a bore gauge at top, middle, and bottom before selecting which piston to slide in. Target 0.04 mm to 0.05 mm piston-to-cylinder wall clearance. When installing the rings, verify ring end gap in the cylinder bore first, position the ring end gaps over the locating pins, and install circlips with the open gap facing either the 6 o'clock or 12 o'clock position—never parallel to the wrist pin bore.

Recommended Pairings:

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