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Wiseco Pistons 4939M08500 Compression ATV Piston Kit - 85mm 11 1

(Yamaha YXR45F Rhino 450 2006-09, YFM450FX Wolverine 4x4 2006-10, YFM450 Grizzly 4x4 Auto 2007-14, YFM450 Grizzly 4x4 Auto EPS 2011-14 + 5 more models)

Part of: Wiseco Pistons Compression ATV Piston Kit

Other options in this family: Wiseco Pistons 4939M08550 Wiseco Pistons 4963M08000 Wiseco Pistons 40046M09300 Wiseco Pistons 4962M08000 Wiseco Pistons 40026M09700

Manufacturer

Picture for manufacturer Wiseco Pistons

Part Number

4939M08500
11 reviews
Sale Price

$209.99

4 left at this price

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Usually delivered within 2 days

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Product Details

The Wiseco 4939M08500 is a high-performance forged piston kit designed specifically for Yamaha ATV applications. This kit features an 85.00mm bore diameter and 11:1 compression ratio, engineered to deliver enhanced power and durability for demanding off-road conditions.

Key Features:

  • Forged in-house from premium aluminum alloy for superior strength and reliability
  • 85.00mm bore diameter with 11:1 compression ratio for optimized performance
  • 19mm wrist pin included with kit
  • Condensed grain structure aligned to part features for maximum impact and fatigue resistance
  • Optimized strength-to-weight ratio for improved throttle response
  • Precision skirt coating reduces friction and extends cylinder life
  • Complete kit includes piston, rings, wrist pin, and circlips

Application:

  • Yamaha YFM450 Grizzly (2007-2009)
  • Yamaha YFM450 Rhino (2006-2009)
  • Yamaha YFM450 Kodiak (2003-2006)
  • Yamaha YFM450 Wolverine (2006-2009)

Wiseco's complete in-house forging process ensures every piston meets exacting standards from raw material to finished product. Unlike brittle cast pistons that fail catastrophically under stress, Wiseco's forged pistons provide the toughness and durability required for high-performance motorsport applications.

Products specifications

Fits

Yamaha YXR45F Rhino 450 2006-09, YFM450FX Wolverine 4x4 2006-10, YFM450 Grizzly 4x4 Auto 2007-14, YFM450 Grizzly 4x4 Auto EPS 2011-14, YFM450 Grizzly 4x4 Auto IRS 2009-10, YFM450 Kodiak 450 2018-21, YFM450 Kodiak 450 EPS 2018 + 2 more models

Fast good

So far so good. A little problem with too many items in shopping cart but I fixed it.

always quick & easy also bought hotchkis front sway from here no problem & best price -free shipping

good

THIS IS MY SECOND SET CHAINS, THE ORIGINAL ORDER ARRIVED IN TWO DAYS, PLEASE LET ME KNOW THEY CAN SHIP JUST AS FAST AND BE DELIVERED ASAP

Awesome...

Quick and easy. Although I noticed a mark-up price for the same battery when searched for different vehicles.

Great Clutch kit I got, did have to contact customer sevice to see if my item shipped but was very nice about it. I would do business with them again. Item shipped quickly. Great price to.

I looked for hours and this was by far the best price I found anywhere. Told all my friends about it. Thanks Autoplicity!

Best price on the internet for my Cobra H&R springs, reasonable shipping, tracking number provided. Couldn't ask for more. Will definitely be back for more.

quick shipping

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