Wiseco Big Bore Replacement Piston

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Wiseco Big Bore Replacement Piston
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Wiseco Big Bore Replacement Piston

Our Price: $125.99$136.91

MSRP: $202.00 - $220.00 - You save up to $83.09 (38% off)

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    -Dan Thomas, CEO and Founder

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    We will stand behind all products we sell with regards to manufacturing defects in workmanship and material. Most products are limited to the manufacturer's warranty. However, we will do everything in our power to take care of the problem.

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    Email: sales@rockymountainatv.com
    Call us: 1 800 336-5437
    7am-7pm Mon-Fri 8am-4pm Sat (Mountain Standard Time)

Additional Videos

How to - check piston ring end gap

How to - rebuild the top end on a motorcycle or atv (Part 2)

How To - Hone A Cylinder

How to - rebuild the top end on a motorcycle or atv (Part 1)

RM YouTube Channel


    Once you’ve felt the power of a 440 big bore kit, you’ll appreciate the work that goes into Wiseco’s Big Bore Replacement Piston.

    Wiseco makes their big bore pistons to exacting standards needed to withstand the incredible forces and power big bored engines put out. That’s why Wiseco uses forged pistons made from incredibly durable aluminum alloy for both strength and longevity in the face of massive torque and horsepower. The skirt of Wiseco pistons comes in a unique profile to help eliminate piston rock and also has an ArmorGlide coating that increases lubrication. When paired together, these two features help the big bore piston run as efficiently as if it was stock.

    Top off all of Wiseco’s innovations off with the fact that these Big Bore Replacement Pistons are made in America, and you have a piston that will keep your 440 big bore running like a top.

  • Forged aluminum alloy
  • Proprietary skirt design
  • Made in the USA
  • ArmorGlide™ skirt coating

Wiseco Big Bore Replacement Piston Reviews

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5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Great power
Did the big bore kit and piston great power!

Machine this part was bought for: 2002 HONDA TRX 400EX
January 13, 2015
High Quailty
Light weight and made my bike run really well. Easy installation came with instructions and a sticker pack. That is what you should expect for the best. Wiseco and RM

Machine this part was bought for: 2000 HONDA TRX 400EX
August 1, 2013
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$500 gift card quarterly drawing!
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