Skip to main content

Confirm this item fits

Add your vehicle to make sure this item fits and qualifies for free returns.

2007
Yamaha
PW50

Picture 1 of 1

Picture 1 of 1

Namura Technologies - NX-40005K - Top End Repair Kit, Standard Bore 39.96mm, 6.0:1 Compression

5.01 product rating
Forward Powersports (395235)
99.6% positive feedback
Price:
$49.95
Free shipping
Estimated delivery Sat, Nov 22 - Fri, Nov 28
Returns:
30 days returns. Seller pays for return shipping.
Condition:
New
Manufactured by Namura. Namura gaskets use performance materials to increase durability and provide greater reliability. Kit is for standard bore size - 40.00mm. Compatible with Yamaha models below Includes all gaskets pictured to rebuild top end.

About this product

Product Identifiers

BrandNamura Technologies
Manufacturer Part NumberNX-40005K
eBay Product ID (ePID)182545306

Additional Product Features

Part TypeTop End Repair Kit

All listings for this product

Buy It Nowselected
New
Namura Standard Bore Top End Repair Kit for Yamaha PW50 fits 1990-2024 40mm
Almost gone
item 1 Namura Standard Bore Top End Repair Kit for Yamaha PW50 fits 1990-2024 40mm
$49.95
Free shipping
Namura Top End Repair Kit 39.96mm 6.0:1 fits Yamaha PW50 Y-Zinger 81-09,12-15
item 2 Namura Top End Repair Kit 39.96mm 6.0:1 fits Yamaha PW50 Y-Zinger 81-09,12-15
$51.46
Free shipping
Namura Technologies NX-40005K Namura Top End Repair Kit
item 3 Namura Technologies NX-40005K Namura Top End Repair Kit
$54.66
Free shipping
Namura NX-40005K Top End Repair Kit for Various Engines
item 4 Namura NX-40005K Top End Repair Kit for Various Engines
$56.60
Free shipping
Namura NX-40005K Top End Repair Kit Standard Bore 40.00mm, 6.0:1 Compression
item 5 Namura NX-40005K Top End Repair Kit Standard Bore 40.00mm, 6.0:1 Compression
$56.76
Free shipping
Namura Top End Repair Kit - Standard Bore 39.96mm, 6.0:1 Compression NX-40005K
item 6 Namura Top End Repair Kit - Standard Bore 39.96mm, 6.0:1 Compression NX-40005K
$56.87
Free shipping
Namura Technologies NX-40005K Top End Repair Kit - Standard Bore 39.96mm, 6.0:1
item 7 Namura Technologies NX-40005K Top End Repair Kit - Standard Bore 39.96mm, 6.0:1
$56.87
Free shipping
1981-2012 Yamaha PW50 Namura Top End Rebuild Piston Kit Rings Gaskets Bearing
item 8 1981-2012 Yamaha PW50 Namura Top End Rebuild Piston Kit Rings Gaskets Bearing
$57.74
Free shipping
Namura Top End Repair Kit Standard Bore 40.00mm, 6.0:1 Compression NX-40005K
item 9 Namura Top End Repair Kit Standard Bore 40.00mm, 6.0:1 Compression NX-40005K
$59.29
Free shipping
NAMURA Top End Kit 39.96/Std 11:1 Yam NX-40005K
item 10 NAMURA Top End Kit 39.96/Std 11:1 Yam NX-40005K
$60.09
Free shipping
Namura Top End Repair Kit, Standard Bore 39.96mm, 6.0:1 Compression | NX-40005K
item 11 Namura Top End Repair Kit, Standard Bore 39.96mm, 6.0:1 Compression | NX-40005K
$60.79
Free shipping
Namura Top-End Rebuild Kit 1981-14 Yamaha PW50 - 39.96mm NX-40005K
item 12 Namura Top-End Rebuild Kit 1981-14 Yamaha PW50 - 39.96mm NX-40005K
$62.08
Free shipping
Namura Top End Repair Kit Standard Bore 40.00mm, 6.0:1 Compression #NX-40005K
item 13 Namura Top End Repair Kit Standard Bore 40.00mm, 6.0:1 Compression #NX-40005K
$62.37
Free shipping
Namura NX-40005K Top End Repair Kit for Engine Pistons Piston Kits vs
item 14 Namura NX-40005K Top End Repair Kit for Engine Pistons Piston Kits vs
$62.69
Free shipping
Namura Top End Repair Kit NX-40005K
item 15 Namura Top End Repair Kit NX-40005K
$63.02
Free shipping
Namura (NX-40005K) 39.96mm Top End Repair Kit
item 16 Namura (NX-40005K) 39.96mm Top End Repair Kit
$64.55
Free shipping
NX-40005K NAMURA TOP END REPAIR KIT
item 17 NX-40005K NAMURA TOP END REPAIR KIT
$64.55
Free shipping
Namura Top End Repair Kit - Standard Bore 39.96mm, 6.0:1 Compression - NX-40005K
item 18 Namura Top End Repair Kit - Standard Bore 39.96mm, 6.0:1 Compression - NX-40005K
$64.55
Free shipping
Namura Top End Repair Kit NX-40005K
item 19 Namura Top End Repair Kit NX-40005K
$64.95
Free shipping
Yamaha PW50 1981-2022 Top End Repair Piston Kit Std Bore 40mm Namura NX-40005K
item 20 Yamaha PW50 1981-2022 Top End Repair Piston Kit Std Bore 40mm Namura NX-40005K
$64.95
Free shipping
Namura Top End Repair Kit - NX-40005K
item 21 Namura Top End Repair Kit - NX-40005K
$66.95
Free shipping
NAMURA NX-40005K TOP END KIT 39.96/STD 11:1 YAM
item 22 NAMURA NX-40005K TOP END KIT 39.96/STD 11:1 YAM
$59.39
+$8.99 shipping
Namura NX-40005K Top End Kit 39.96/Std 11:1 fits Yamaha
item 23 Namura NX-40005K Top End Kit 39.96/Std 11:1 fits Yamaha
$69.21
Free shipping
Namura NX-40005K Top End Kit 39.96/Std 11:1 fits Yamaha
item 24 Namura NX-40005K Top End Kit 39.96/Std 11:1 fits Yamaha
$69.21
Free shipping
Namura Std Top End Kit 6.0:1 NX-40005K for Yamaha PW50 1990-2023
item 25 Namura Std Top End Kit 6.0:1 NX-40005K for Yamaha PW50 1990-2023
$69.27
Free shipping
Namura Top End Repair Kit Standard Bore 40.00mm, 6.0:1 Compression NX-40005K
item 26 Namura Top End Repair Kit Standard Bore 40.00mm, 6.0:1 Compression NX-40005K
$60.31
+$9.95 shipping
NAMURA TOP END REPAIR KIT NX-40005K
item 27 NAMURA TOP END REPAIR KIT NX-40005K
$70.71
Free shipping
Namura Top End Repair Kit NX-40005K
item 28 Namura Top End Repair Kit NX-40005K
$70.95
Free shipping
Namura 185-4005 NX-40005K TOP END KIT 39.96/STD 11:1 YAM
item 29 Namura 185-4005 NX-40005K TOP END KIT 39.96/STD 11:1 YAM
$70.95
Free shipping
Namura Top End Repair Kit Standard Bore 40.00mm, 6.0:1 Compression NX-40005K
item 30 Namura Top End Repair Kit Standard Bore 40.00mm, 6.0:1 Compression NX-40005K
$72.99
Free shipping
Namura Top End Rebuild Kit Standard Bore 40.00mm, 6.0:1 Compression NX-40005K
item 31 Namura Top End Rebuild Kit Standard Bore 40.00mm, 6.0:1 Compression NX-40005K
$64.56
+$9.99 shipping
NX-40005K Namura Top End Repair Kit
item 32 NX-40005K Namura Top End Repair Kit
$70.95
+$5.99 shipping
NAMURA 2017 PW 50 Yamaha TOP END KIT 39.96/STD 11:1 YAM NX-40005K
item 33 NAMURA 2017 PW 50 Yamaha TOP END KIT 39.96/STD 11:1 YAM NX-40005K
$77.01
Free shipping
NAMURA 2018-2019 PW 50 Yamaha TOP END KIT 39.96/STD 11:1 YAM NX-40005K
item 34 NAMURA 2018-2019 PW 50 Yamaha TOP END KIT 39.96/STD 11:1 YAM NX-40005K
$77.01
Free shipping
NAMURA 1990-2016 PW 50 Yamaha TOP END KIT 39.96/STD 11:1 YAM NX-40005K
item 35 NAMURA 1990-2016 PW 50 Yamaha TOP END KIT 39.96/STD 11:1 YAM NX-40005K
$77.01
Free shipping
Namura Top End Repair Kit Standard Bore 40.00mm, 6.0:1 Compression
item 36 Namura Top End Repair Kit Standard Bore 40.00mm, 6.0:1 Compression
$70.95
+$10.00 shipping
NAMURA Top End & Piston 39.96/STD 11:1 Yamaha PW 50 1990-2021 NX-40005K
item 37 NAMURA Top End & Piston 39.96/STD 11:1 Yamaha PW 50 1990-2021 NX-40005K
$68.82
+$12.99 shipping
Top End & Piston 39.96/STD 11:1 Yamaha PW 50 1990-2021
item 38 Top End & Piston 39.96/STD 11:1 Yamaha PW 50 1990-2021
$67.40
+$15.00 shipping
NAMURA - NX-40005K - TOP END REPAIR KIT
item 39 NAMURA - NX-40005K - TOP END REPAIR KIT
$90.12
Free shipping
Namura [NX-40005K] Top End Repair Kit Standard Bore 40.00mm, 6.0:1 Compression
item 40 Namura [NX-40005K] Top End Repair Kit Standard Bore 40.00mm, 6.0:1 Compression
$70.95
+$19.99 shipping
listings for this product

Ratings and Reviews

Learn more
5.0
1 product rating
  • 1 users rated this 5 out of 5 stars
  • 0 users rated this 4 out of 5 stars
  • 0 users rated this 3 out of 5 stars
  • 0 users rated this 2 out of 5 stars
  • 0 users rated this 1 out of 5 stars

Most relevant reviews

  • by dsmi6388
    Jun 14, 2025

    Exactly as described, excellent quality,...

    Exactly as described, excellent quality, tight ring gap so I can adjust to appropriate gap with file. Fits 2023 pw50 with standard 40.00mm bore Niche cylinder

    Verified purchase: YesCondition: New

Best Selling in Engine Rebuild Kits & Components

Save on Engine Rebuild Kits & Components

Trending price is based on prices over last 90 days.

You may also like