TRX400EX TRX 400EX 89mm 440 Big Bore Race Gas Hi Comp 12.5:1 Piston Top End Kit

• Works on all Honda 400EX 400X and XR400R models
• NEW 89mm cylinder
• 12.5:1 Wiseco or JE forged piston** - race gas only
• Nitrite coated hi temp piston rings
• Chrome wristpin
• Circlips
• Talon TITANIUM cylinder head stud kit - LIFETIME WARRANTY*
• Top end gasket kit - head base exhaust chain tensioner cylinder
• Cometic MLS big bore head gasket
• HD timing chain conversion
• NGK spark plug
• Stickers
• Piston uses race gas only
• No case or head mods required
• 1 year warranty*
• If you need this installed on your vehicle contact us!

*Warranty: We stand behind all parts we sell 100%.  If after installation there is an issue contact us for a warranty return.  This product is NOT DIY.  Over 99% of people in the world are not qualified to build an engine, and the party performing the work is responsible for ensuring the parts are correct and installed properly.  We ALWAYS STRONGLY recommend this be done by a qualified, experienced mechanic. Warranty does not cover failure that is a result of improper installation, tuning, break in, lack of maintenance, or misuse.  For any warranty to be considered the part(s) in question must be sent to us for inspection.  We do not warranty parts based on phone calls, photos, emails, what you read online, or another mechanic's assessment alone.  We have a good warranty program, but there is a procedure that must be followed.