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Big Bore Cylinder kit 54mm compatible with Dolmar PS 7900, Makita DCS 6401, 6421
Dolmar PS 7900, Makita DCS 6401, 6421 big bore cylinder piston assembly 54mm
 
Our Price: $113.94
Summer Sale!: $94.95
Part #: H30640-B

Important:

Warranty for a New Cylinder Kit.pdf


Proposition 65 Warnings:

www.p65warnings.ca.gov



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Description
 

Quality Aftermarket Big Bore Kit for Dolmar and Makita Chainsaws

Boost your chainsaw’s power with this Quality Aftermarket Big Bore Kit, featuring a 54mm bore and a hole for a decompression valve. Designed for Dolmar PS 7900, Makita DCS 6401, and DCS 6421, this kit enhances engine performance, making it ideal for heavy-duty cutting tasks.

This high-quality aftermarket kit includes a cylinder, piston, rings, wrist pin, and cir clips, all engineered for precise compatibility. It’s a cost-effective upgrade for professional arborists and loggers, ensuring reliable operation during felling, limbing, or bucking large timber.

Key Features:

  • Quality aftermarket big bore kit with 54mm bore
  • Features a hole for decompression valve
  • Includes cylinder, piston, rings, wrist pin, and cir clips
  • Designed for enhanced engine performance
  • Cost-effective upgrade for durability

Compatibility:

Dolmar Models:

  • Dolmar PS 7900

Makita Models:

  • Makita DCS 6401
  • Makita DCS 6421

Note: Professional installation is recommended to ensure proper fit and performance. Verify compatibility with your specific Dolmar or Makita model before purchasing.

Increase your chainsaw’s power with this big bore kit at an unbeatable value!

Fits models:
  • Dolmar PS 7900
    Makita DCS 6401, 6421

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Average Customer Review: Average Customer Review: 4.5 of 5 4.5 of 5 Total Reviews: 17 Write a review.

  0 of 0 people found the following review helpful:
 
4 of 5 7900 piston and cylinder kit July 10, 2024
Reviewer: Travis  
Overall quality of cylinder is great. The piston has a defect on a spot of the top outer edge. Still usable but I'd prefer a different piston

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  0 of 0 people found the following review helpful:
 
5 of 5 February 27, 2024
Reviewer: Richard Sullivan from WALDEN, NY United States  


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  0 of 0 people found the following review helpful:
 
5 of 5 big bore kit 54mm November 8, 2021
Reviewer: Asahel Long from CANTON, NC United States  
This kit went in well and runs great

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  0 of 0 people found the following review helpful:
 
5 of 5 Good deals October 22, 2020
Reviewer: Scott Schwebe from Columbia, MO United States  
Great prices and fast shipping! Purchased a big bore kit

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  0 of 0 people found the following review helpful:
 
5 of 5 New top end- second BB kit April 19, 2020
Reviewer: Anonymous Person from Windham, ME United States  
I have had 3 7900's, and I am down to 2 at this point.  After running them stock for about 4 seasons, I normally swap into the BB kit.  Always been good, this price is the best I have seen.  Last one was Bailey's, looking forward to seeing how this one holds up.  Went together fine, and the ring seems a bit better than the last one I had from Bailey's.  Casting seems fine, connecting rod holder-clips-nightmares are without ears (preferred), I have had the other AF type fail.  Overall happy, and have run my full tank at idle through it already, and it's going to work tomorrow.

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