A matched pair of standard-size piston kits for the RD250 two-stroke twin. Standard bore, so no rebore is needed if your barrels are still on size — pistons, rings, pins and circlips for both cylinders in one purchase.

- 2 x Pistons — 54.00mm STD

- 2 x Piston Ring Sets

- 2 x Piston Pins (wrist pins)

- 2 x Sets of Piston Circlips

- Part Number (O.E.M. reference): 4L1-1163X

- Model code: 4L1

- Size: STD / 54.00mm (standard — no rebore required)

- Quantity: 2 complete kits (full engine set)

- Brand: IMD

- Condition: New

- Yamaha RD250

- Yamaha RZ250

- Yamaha RD250LC

This is the 250 (4L1) engine. It does NOT fit the RD350 / RZ350, which uses a larger bore and a different piston — check your model before ordering.

This is a STANDARD size set for a 54.00mm bore. It will not fit an engine that has already been bored oversize. Please measure your bores before ordering. Where possible, all parts are listed by part number (O.E.M.). Buyer is responsible for confirming the correct size and fitment for their engine.

Fitting should be carried out by a competent engineer. No liability can be accepted for parts incorrectly fitted, or for any failure of such parts after fitting.

- Dispatched from Chester, United Kingdom within 1 working day of cleared payment

- Royal Mail International Tracked

- 30-day returns accepted — buyer pays return postage

- Buyer is responsible for any import duties, taxes or customs charges in the destination country

Also available for the RD250 in +0.75mm / 54.75mm. Message us with your bore measurement if you are unsure which one you need.

Ideal for an RD250 / RZ250 engine rebuild, restoration or custom build.