Honda 400EX Top End Rebuild Kit Wiseco 4606M08500 Stock Cylinder Assembly Parts
Honda 400EX Top End Rebuild Kit Wiseco 4606M08500 Stock Cylinder Assembly Parts
Honda 400EX Top End Rebuild Kit Wiseco 4606M08500 Stock Cylinder Assembly Parts
Honda 400EX Top End Rebuild Kit Wiseco 4606M08500 Stock Cylinder Assembly Parts

Honda 400EX Top End Rebuild Kit Wiseco 4606M08500 Stock Cylinder Assembly Parts

Regular price$418.00
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Honda 400EX Top End Rebuild Kit Wiseco 4606M08500 Stock Cylinder Assembly Parts


  • BPRATV 85mm cylinder
  • 85mm (stock bore) Wiseco forged piston
  • Nitrite-coated piston rings
  • Chrome wrist pin
  • Circlips
  • Cometic top-end gasket kit
  • Cometic MLS head gasket
  • Talon TITANIUM cylinder head stud kit - LIFETIME WARRANTY*!
  • NGK spark plug
  • Piston uses pump or race gas
  • Works on all Honda 400EX, 400X, and XR400R models and years
  • 1-year warranty*

**Warranty: This product is NOT DIY. Over 99% of people in the world are not qualified to build an engine, and it is the responsibility of the person assembling and tuning the engine to make sure all the parts are correct and work properly. We ALWAYS STRONGLY recommend work be done by a qualified, experienced mechanic. For any warranty to be considered the part(s) in question must be sent back to us for inspection, NO EXCEPTIONS. We cannot warranty anything based on photos, emails, phone calls, what you read online alone, or what another mechanic says the problem is alone. Warranty does not cover any failure that is a result of improper installation, tuning, break-in, lack of maintenance, or misuse.

We ship next day most of the time. Modquad parts are shipped Monday-Thursday. Engine Kits are 3-5 business days.

We don't do backorder! If your items has already sold you will be notified immediately and you money refunded on the spot.

Sold items are removed daily.

If you see it on this website, it is 100% in stock unless it just sold before you clicked buy.

If you call we answer, if you text we respond, if you have a question we respond. Sometimes we sleep so it could be next morning but we will respond.

Thank you for shopping with us! We appreciate you!

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Cut em Up!

Dune Goons Rider ~ Breanna
Showing her personal style and cutting the shirts up to her liking. We don't mind one bit! Cut em Up!