SKU: 79362320519

1987-1999 Yamaha Big Bear 350 4x4 (YFM350FW) Cylinder Piston Gasket Top End Kit Set 1UY-11310-03-00 Generic

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Description

1987-1999 Yamaha Big Bear 350 4x4 (YFM350FW) Cylinder Piston Gasket Top End Kit Set 1UY-11310-03-00 GenericCylinder Piston Gasket Top End Kit Set For Yamaha Bruin 350 2x4 4x4 2004 2006 Generic Features: Kit includes piston, rings, pin, clips, & top end gasket kit (you get exactly what is pictured). Cast piston has super high silicone content for additional strength. Piston skirts are Molybdenium Teflon coated to minimize resistance wear and provide extended life. Piston dome is anodized for superior heat resistance and longer lifespan. The gaskets use

Cylinder Piston Gasket Top End Kit Set For Yamaha Bruin 350 2x4 4x4 2004-2006 Generic

Features:
Kit includes piston, rings, pin, clips, & top end gasket kit (you get exactly what is pictured).
Cast piston has super-high silicone content for additional strength.
Piston skirts are Molybdenium Teflon coated to minimize resistance/wear and provide extended life.
Piston dome is anodized for superior heat resistance and longer lifespan.
The gaskets use performance materials to increase durability and provide greater reliability.
Includes all gaskets pictured to rebuild top end.
Kit is for standard bore size - 83.00mm.
Piston is 82.95mm.
All of the components within this kit are bolt-on ready for a hassle free installation.

Specifics:
Condition: Aftermarket 100% Brand New
Quantity: 1 Set
Piston Material: Forged Aluminum
Actual Displacement: 348 cc
Bore size: STD 83 mm
Piston diameter: 82.95 mm
Piston height: 58.8 mm
Piston pin diameter: 19 mm
Piston pin height: 65 mm
Stroke: 64.50 mm

Replaces Part Number:
Cylinder: 1UY-11310-03-00, 5YT-11310-00-00, 4WU-11310-00-00
Piston: 1YW-11631-01-Y0
Piston Pin: 55V-11633-00-00
Piston Ring Set: 4GB-11610-00-00
Head Gasket: 1UY-11181-01-00
Base Gasket: 4KB-11351-00-00
2x Circlips: 93450-19095-00

Fitment:
Fit for Yamaha Big Bear 350 4x4 (YFM350FW) 1987 - 1999
Fit for Yamaha Big Bear 350 2x4 (YFM350U) 1996 - 1999
Fit for Yamaha Bruin 350 4x4 (YFM350FA) 2004 - 2006
Fit for Yamaha Bruin 350 2x4 (YFM350A) 2004 - 2006
Fit for Yamaha Grizzly 350 2x4 (YFM350G) 2007 - 2011
Fit for Yamaha Grizzly 350 4x4 (YFM350FG) 2007 - 2014
Fit for Yamaha Grizzly 350 4x4 IRS (YFM350FGI) 2007 - 2011
Fit for Yamaha Moto-4 350 (YFM350ER) 1987 - 1995
Fit for Yamaha Raptor 350 (YFM350R) 2004 - 2013
Fit for Yamaha Warrior 350 (YFM350X) 1987 - 2004
Fit for Yamaha Wolverine 350 4x4 (YFM350FX) 1995 - 2005
Fit for Yamaha Wolverine 350 2x4 (YFM350X) 2006 - 2009

(Compatibility Chart is for Reference ONLY!!!)
(Please Compare with Your faulty unit and the image we provided to Decide Fitment)

Package Includes:
1x Cylinder
1x Piston
1x sets of Rings
1x Wristpin
2x Circlips
1x Intake Gasket
1x Cylinder Head Gasket
1x Cylinder Base Gasket

Note:
Ring end gaps are checked prior to shipment for proper sizing.
Please check out the product and size fits your motorcycle or not before you purchase.

Warranty:
Returns: Customers have the right to apply for a return within 60 days after the receipt of the product
24-Hour Expert Online: Solve your installation and product problems

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 79362320519

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4.5 ★★★★★
Based on 25 reviews
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C
Verified Purchase
Cheryl Snow
Pawtucket, US
★★★★★ 5
Best one so far
Still on the never ending quest for the perfect pillow. Must say that for the price this one can't be beat. Not willing to invest a small fortune on a pillow and this one is extremely reasonable
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 1, 2026
A
Verified Purchase
Aimee L Smith
Belleville, US
★★★★★ 5
Seems like a good buy
So far happy with it. Still can't Crack my neck but not waking up w a stiff neck anymore thanks
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 6, 2026
J
Verified Purchase
Jacky Liu
Fort Morgan, US
★★★★★ 5
Really good pillows
Number of Items: 1, Number of Items: 1
I’ve been using this pillow for a while now and it’s honestly one of the most comfortable pillows I’ve tried. It has a soft, cloud-like feel but still gives enough support for my neck and shoulders. I’m a side sleeper and it keeps its shape well through the night. The material feels high quality, and it doesn’t go flat like cheaper pillows. Definitely improved my sleep quality and worth the purchase.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026
D
Verified Purchase
DPLK
San Leandro, US
★★★★★ 5
Soft AND supportive
Number of Items: 1
I knew I needed a very soft pillow - all the foam pillows I had bought recently to try to upgrade our home pilllow selection seemed ok to the touch but were still too firm once I tried them out, but recently I also had some neck pain that needed some gentle support and the old old foam pillow I had that was so very soft was losing its supportive qualities and the pain wasn’t getting better. This one seemed by description to fit the bill- very soft by the company’s own definition but also with support. I’m happy to report this is exactly as advertised- the softest foam pillow I’ve tried out of the box but also good support. Pain has improved since I started using this pillow. I would buy more if we need more pillows, it’s perfect for me and I think would be comfortable for most people. I think you just need to figure out how firm you need your pillow and also height preference . I’m an all over sleeper -back, side, even belly sometimes, so it’s fine for me, but it is a little taller compared to other pillows I’ve bought recently. I didn’t compare/try other prominent pillow brands, mostly my experience is Ikea (my daughter uses a very flat and nice foam pillow from them that is even a little pricier than this one and it works well for her), and whatever brands happen to be available at target and Costco. This price point for a name brand is reasonable, I think; I was looking at other brands way over $100, and I was willing to spend that much for something that would work long term, so this one working was great. Also, this definitely does not have any cooling effect technology, which is fine by me, but something to consider if you do like cool pillows. (Although, PSA: I recently had to throw away older foam pillows that had those cooling gel panels because the gel panels started disintegrating into sticky ooze; gross and had to throw away whole pillow because couldn’t dissociate from rest of the pillow. Sad cuz the foam part of those pillows were fine.) Anyway, if you like softer pillows but want good support, this one works well and is worth trying!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2025
L
Verified Purchase
Lori Wornom
Lexington, US
★★★★★ 4
Flatter than a regular pillow but nice and soft
Number of Items: 1
Is it softer than a typical memory foam pillow? Yes. But it’s also a lot flatter. I don’t find this pillow rebounds very well. It’s good for stomach sleepers but not so much for side sleepers. I’m a 2/3 of the night side sleeper so it’s unfortunately not my magic pillow.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 11, 2026

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