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400EX 400X Complete Motor Assembled Engine 89mm Big Bore Stroker Top Bottom End

$3,199.99

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Compatible Vehicles
Submodel Year Make Model
TRX400EX 2x4 2008 Honda Sportrax 400
TRX400EX 2x4 2007 Honda Sportrax 400
TRX400EX 2x4 2006 Honda Sportrax 400
TRX400EX 2x4 2005 Honda Sportrax 400
TRX400EX 2x4 2004 Honda Sportrax 400
TRX400EX 2x4 2003 Honda Sportrax 400
TRX400EX 2x4 2002 Honda Sportrax 400
TRX400EX 2x4 2001 Honda Sportrax 400
TRX400EX 2x4 2000 Honda Sportrax 400
TRX400EX 2x4 1999 Honda Sportrax 400
2x4 2014 Honda TRX400X
2x4 2013 Honda TRX400X
2x4 2012 Honda TRX400X
2x4 2011 Honda TRX400X
2x4 2010 Honda TRX400X
2x4 2009 Honda TRX400X
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COMPLETE 465cc BIG BORE STROKER BUILT ENGINE! PHOTOS ARE OF ACTUAL ENGINE YOU WILL RECEIVE!
  • Completely rebuilt for all models all years assembled with:
  • 465cc big bore stroker engine
  • 89mm aftermarket cylinder
  • 89mm 11:1 CP-Carrillo forged stroker piston
  • Nitrite coated piston rings
  • Chrome wristpin
  • Circlips
  • New aftermarket cylinder head assembled
  • Stage 3 Hotcam
  • Kibblewhite Valves and valve spring kit
  • Valve keepers and valve stem seals
  • Rocker arms and shafts
  • Hotrods +4mm stroker crank assembly with rod
  • Crank bearings
  • Transmission bearings
  • Clutch bearings
  • Crank balancer bearings
  • Camshaft bearings
  • Clutch kit
  • Complete gasket kit
  • Cometic MLS big bore head gasket
  • Oil seal kit
  • NGK spark plug
  • K&N oil filter
  • Maxlock cylinder stud kit with nuts
  • Maxlock cylinder head stud kit with nuts
  • Timing chain
  • Timing chain guides
  • Used core bottom end cleaned and bead blasted
  • Transmission completely cleaned and bead blasted
  • Full assembly
  • Piston uses pump or race gas
  • No mods except carb re-jetting are required*
  • 6 month warranty on all parts and labor performed by bpratv*

  • PRICES AND LISTINGS ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE.

DO YOU MAKE A LIVING WORKING ON BIKES? ARE YOU A SHOP OR DEALER?  IF SO CONTACT US ABOUT OUR DEALER PROGRAM THAT GIVES YOU DISCOUNTS ON EVERYTHING WE SELL!

Payments:  We accept all forms of traditional and online payment methods available – Cash, MC, AMEX, VISA, DISC, PayPal, Venmo, Cash App, among others.  Payment can be made online or over the phone.

 Returns: Please check your order completely when you receive it and contact us if there is an issue.  99% of problems can be easily solved without returning the entire order.  We accept returns within the first 30 days.  If you are returning an order because buyer “Changed Mind” it is subject to a 10% restocking fee plus a deduction for our cost shipping the order to you.  Orders must be sent back 100% complete and all parts must be brand new, never installed, in the original packaging to receive a refund for them.  Once items have been modified, installed, or used in any way they are not eligible for return.  It is the buyer’s responsibility to ensure returned parts arrive to us in the same condition they were when they left our facility.  For more info about returns see the eBay Return Policy. 

 *Warranty: You must re-jet your carb for this engine to work properly and not run lean.  Warranty includes the parts and labor bpratv supplied.  It does not cover any failure that is a result of improper installation of the engine, incorrect or not tuning, lack of proper break in period, lack of regular maintenance, or abuse.  This product is NOT DIY.  Over 99% of people in the world are not qualified to build an engine or  properly install and tune this one, and it is the responsibility of the person assembling and tuning the engine to make sure everything works correctly.  We ALWAYS STRONGLY recommend parts be installed by a qualified, experienced mechanic.  Warranty does not cover failure that is a result of improper installation, tuning, break in, or misuse.  WE DO NOT WARRANTY PARTS BASED SOLELY ON PHONE CALLS, EMAILS, PHOTOS, VIDEOS, WHAT YOU READ ONLINE, OR WHAT ANOTHER MECHANIC SAYS IS THE PROBLEM.  WE HAVE A VERY GOOD WARRANTY PROGRAM BUT FOR ANY WARRANTY TO BE CONSIDERED THE PART(S) IN QUESTION MUST BE SENT BACK TO US TO INSPECT.  NO EXCEPTIONS.

Feedback: Positive feedback is greatly appreciated.  We have changed the way we do business in response to customer concerns and receiving positive feedback when an order goes the way it is supposed to is a huge help.  If you do not feel we deserve positive feedback just contact us and we will do what is needed to help you feel as "positive" as possible about your experience.  Also, we want information from customers when their experience is less than desirable so we know what areas need improvement the most.  Please work with us and we will ALWAYS work with you.