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Pro X Piston Assembly - 66.35mm Bore - 01.2321.B

  • Part #:
    138338SB
  • Manufacturer Part #:
    01.2321.B

MSRP Price: $109.95

Our Price: $98.96

You Save:
$10.99 (10%)
1 on Hand

Overview of Pro X Piston Assembly - 66.35mm Bore - 01.2321.B

  • The smart alternative to costly engine repairs
  • Cast from a high-silicone content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances
  • Available in standard and oversizes
  • Pro X rings are exact OEM replacements and can be interchange with stock part
  • B, C, D and E extend the life of expensive plated cylinders


  • Included Items:
    One 66.35mm piston
    One set rings
    Two circlips
    One wrist pin

    NOTE: This is a fractional oversize piston of .0004 in. (four-ten-thousandths inch) intended for slightly worn cylinders - Please be sure this is what you need before ordering

Specs for Pro X Piston Assembly - 66.35mm Bore - 01.2321.B

Bore Size 66.35 mm
Type Piston Assembly
Type Piston w/Ring Set
Units Each
Weight 0.68 lbs

Cross reference number(s):

PX7130B

Specs for Pro X Piston Assembly - 66.35mm Bore - 01.2321.B

Bore Size 66.35 mm
Type Piston Assembly
Type Piston w/Ring Set
Units Each
Weight 0.68 lbs

Fitment for Pro X Piston Assembly - 66.35mm Bore - 01.2321.B

See if this part fits your ride

Part 138338SB fits the following machines

Suzuki
  • 2006 Suzuki RM250
  • 2005 Suzuki RM250
  • 2004 Suzuki RM250
  • 2003 Suzuki RM250
Yamaha
  • 2018 Yamaha YZ250
  • 2017 Yamaha YZ250
  • 2016 Yamaha YZ250
  • 2015 Yamaha YZ250
  • 2014 Yamaha YZ250
  • 2013 Yamaha YZ250
  • 2012 Yamaha YZ250
  • 2011 Yamaha YZ250
  • 2010 Yamaha YZ250
  • 2009 Yamaha YZ250
  • 2008 Yamaha YZ250
  • 2007 Yamaha YZ250
  • 2006 Yamaha YZ250
  • 2005 Yamaha YZ250
  • 2004 Yamaha YZ250
  • 2003 Yamaha YZ250
  • 2002 Yamaha YZ250
  • 2001 Yamaha YZ250
  • 2000 Yamaha YZ250
  • 1999 Yamaha YZ250
  • 2018 Yamaha YZ250X
  • 2017 Yamaha YZ250X
  • 2016 Yamaha YZ250X
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Instructions and Manuals for Pro X Piston Assembly - 66.35mm Bore - 01.2321.B

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