Wiseco Big Bore Replacement Gasket Kit

Choose a vehicle:

User Tip: If you're unsure of your vehicle type, you may skip the machine type selection box.

» Log in to use your Rider Profile Machines
Wiseco Big Bore Replacement Gasket Kit
  • View Larger
  • Video

Wiseco Big Bore Replacement Gasket Kit

Our Price: $48.32$61.92

MSRP: $68.79 - $89.06 - You save up to $27.14 (30% off)

View Product Details

Select type, year, make and model above

Live Help
  • "Customer service is priority #1 at Rocky Mountain ATV/MC. We value our customers and strive to be the best shopping experience- when you buy from us, you are buying lifetime service."

    -Dan Thomas, CEO and Founder

  • Returns

    We take pride in offering no hassle returns. In the event of a return, please call, email or chat with us to receive a solution to the problem. For apparel that doesn't fit quite right, Click here to see our Fit Guaranteed Program.

  • Warranties

    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.

  • Have questions?

    Live Help (Leave email if after hours)
    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 - rebuild the top end on a motorcycle or atv (Part 1)

RM YouTube Channel


    When you’ve spent the time and money putting a big bore on your machine, don’t trust an inferior gasket to keep that extra power in check. With the Wiseco Big Bore Replacement Gasket Kit you’ll get everything you need to button up your big bore and keep it running right.

    This kit comes with all the gaskets and seals you need to do a complete rebuild for a 440 big bore engine on your dirt bike, ATV, or dual sport. Each and every component is made to exacting standards from the best materials to ensure a proper fit and superior sealing against the increased forces that come with bored engines. With years in the industry and performance that has long been established, you can count on Wiseco to deliver one of the best, most complete gasket kits available.

    Pick up a Wiseco Big Bore Replacement Gasket Kit and start riding on a motor that will feel more fresh than ever.

  • Complete kit for top and bottom end rebuilds
  • Contains all necessary gaskets, O-rings, and seals
  • High quality gasket material
  • Gasket set for the 440 big bore kit

Wiseco Big Bore Replacement Gasket Kit Reviews

Each review submitted enters you into a
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
4.7 / 5.0
3 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Fit good
Did the job.

Machine this part was bought for: 2002 HONDA TRX 400EX
January 13, 2015
Buy quality and get quality
Wiseco gaskets are some of the best.
March 10, 2008
Blair in AL
This is a good kit but the factory one seem to work just as well for me.
October 22, 2007
Each question or answer submitted enters you into a:
$100 gift card monthly drawing and a
$500 gift card quarterly drawing!
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 1 question Browse 1 question and 1 answer
What millimeter bore kit is this it doesn’t say?
A shopper on Nov 19, 2017
BEST ANSWER: It will depend on your bike. What bike do you have? And what piston do you have?
RM Cash ProgramParts Finder