Namura Big Bore Top End Repair Kit

Item Number: 347587


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Product Description


Namura Big Bore Top End Repair Kit

Namura top-end repair kit can help improve the performance of your ride and keeping it running in peak condition. Each kit includes everything you need to get your ride operational again; piston, piston rings, top-end gasket kit to get the job done.

  • Everything you need to service your engine in one convenient kit
  • Piston comes with rings
  • Top end gasket kit
  • Everything for a top end rebuild in one box

Spec Details
Compression Ratio 11:1
Displacement 440cc
Size Over Standard 4.00mm
Type Big Bore

Vehicle Fitment

Fitment is guaranteed or your money back plus free return shipping. Don't waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.


  • TRX400EX FourTrax 400EX 1999
  • TRX400EX Sportrax 400EX 2000-2008
  • TRX400X Sportrax 400X 2012-2014
  • XR400R 1996-2004

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