Kawasaki EX250 Ninja Piston Kit - Wiseco - 12.5:1 CR, 64.00 mm Bore - `08-`12. This Wiseco Forged Series piston kit is built for riders who want a durable, high-quality replacement or upgrade for their EX250 (2008–2012) engine. It provides a complete piston assembly matched to the specified bore and compression ratio.

The forged construction offers improved strength and service life under higher stress than many cast alternatives, while maintaining compatibility with the EX250 platform. Each kit is supplied complete with piston, wrist pin, rings, and circlips so you have everything required for installation. The 64.00 mm bore size and 12.5:1 compression ratio are intended for builders seeking a specific compression setup for tuning or rebuilds without needing to source parts separately.

Features

• Forged piston construction for enhanced durability and resistance to fatigue
• Complete kit: piston, wrist pin, rings, and circlips included
• 64.00 mm bore sized for Kawasaki EX250 models `08–`12
• 12.5:1 compression ratio for higher compression applications
• Precision machining to match fitment expectations for rebuilds and custom builds

If you have questions about fitment, installation, or compatibility with other engine modifications, call us anytime — we’re happy to help. We have two locations offering installation and customization services: Austin, Texas and the Los Angeles, California area. Call: 512-982-9393 (TX) or 562-981-6800 (CA).

If you are considering purchasing multiple items, contact us for possible shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov