Partiron

Find Parts for Your Machine

PROX Engine Rebuild Kit

PROX

PROX Engine Rebuild Kit

Item #: 19-EK5806A + 1 option

$999.95

Select Your Vehicle

This product is vehicle specific. Select your vehicle to see the part that fits.

Need Help Finding the Right Part?

Not sure it fits? Ask before you order — our team will check the part for your machine.

For a faster answer, include:

Year, make and model of your machine

VIN or frame / serial number

OEM part number or a photo of the old part

  • Complete rotating and reciprocating rebuild kit including crankshaft assembly, main bearings and seals, pistons and components, and a complete engine gasket kit
  • All components were developed through extensive research and development on ProX’s in-house engine dyno
  • Crankshafts come completely assembled using Maxima® assembly lube and are inspected in-house for proper dimensions and trueness
  • Connecting rods feature proprietary design done in-house, and are forged, heat-treated, and shot-peened for ultimate tensile strength and reduced stress risers
  • Connecting rods include graded bearings in the big end to ensure proper clearance, as well as a bronze bushing in the small end, both improving longevity and performance
  • Pistons are cast from OEM-grade alloy and feature MOS2 skirt coating and hard- anodized crown and ring grooves for improved performance and wear resistance through reduced friction and improved heat resistance
  • Includes Japanese-sourced, Koyo main bearings along with OEM quality seals and complete gasket kit to ensure a reliable engine rebuild
  • More applications covered in fewer part numbers with versatile gasket kits and compression ratios
  • Available in A/B/C graded bore sizes

Fitment details

BrandYearModel

Reviews

No reviews yet

Be the first to share how it fits your bike. The review form opens by the Write a Review button.

Free Shipping on Orders Over $99

Free ground shipping on US orders over $99, with tracking. Delivery time is shown before you pay, so you know when it arrives.

Support From People Who Ride

Not sure about size or fit? Ask us before you order. Our team rides too and will help you pick what suits your bike.

Genuine OEM & Trusted Brands

OEM parts for Honda, Yamaha, Kawasaki, Can-Am, Polaris and more, plus gear from makers riders trust. No no-name imports.

Parts That Fit Your Machine

Enter your machine’s type, year, make and model, and we’ll show only the parts and gear that fit it.