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THIS ITEM IS IN STOCK READY FOR SAME WORKING DAY DISPATCH

2003-2012 KTM SX85 Full Engine Rebuild Kit

Mitaka Piston Kit

Piston - High silicon cast aluminium alloy, CNC machined, Teflon coating in high friction areas, Dome top.
Rings - Are the best available! Riken are the same manufacturer used on many Japanese and European OEM pistons.
Gudgeon Pin - Hollow, forged, steel alloy, chromed, high strength and hardness. Circlips included.

The piston that will be sent is a B size piston kit (46.95mm - Standard Size) if you wish to change to an A size (46.94mm), C size (46.96mm), D size (46.97mm), E size 46.98mm, oversize 47.50mm or 48.00mm please send a message when placing your order.  Also available in other listings with a Vertex piston.

Mitaka Gasket Set

Head gasket, Base gasket, Exhaust valve gaskets, Exhaust pipe O-rings, Clutch cover gasket, Side case gasket, Crankcase halves gasket, Reed valve gasket, Water pump gasket, Hydraulic clutch gasket, Ignition cover gasket & various o-rings if required.

Mitaka Seal Set

Includes all seals required, Main bearings, Countershaft, Clutch rod lever, Gear shift shaft, Water pump, etc

Mitaka Complete Crank

Complete crank precision trued, engineered to OEM specification and materials using precision machining techniques. High quality steel alloy crank webs, chromed crank pin, quality big end roller bearing designed for high speeds (flat silver bearing cage), Japanese forged shot peened connecting rod made using the latest steel alloy for OEM quality and strength, copper or silver thrust washers designed for high oil flow, heavy duty small end bearing.

Koyo & NTN Main Bearings

High quality Japanese OEM spec bearings, Koyo roller on ignition side, NTN ball bearing clutch side.


(Item may vary from picture, you will receive the item listed)

Mitaka components are engineered to OEM specifications or higher using the same manufacturing techniques and high quality materials.



For the majority of 2 and 4 stroke motocross bikes since the late 80's to present Best MX Shop offers - Piston kits, Connecting rod kits, Complete cranks, Main bearings, Gasket sets, Seal sets, Titanium valves, Steel valve and spring kits, 4 stroke cylinder kits, Clutch disc kits, Clutch baskets, Clutch centres, and Clutch pressure plates. If the item you require is not listed please get in contact as listings are constantly being added.

This item is usually in stock and shipped within one working day from Queensland, Australia.

Free Post Australia Wide

Please ensure you know the correct year and model of bike before you order. If you are unsure please contact your local dealer with the frame number. If your local dealer is unable to help please send the frame numbers and pictures and we will attempt to find the details. If you order the wrong parts you will have to pay postage costs and a restocking fee upon exchange for the parts in original condition; However if we make a mistake we will cover postage costs and get the correct parts to you as quickly and smoothly as possible, or issue a full refund upon exchange for the parts in original condition.