Return to Dolmar PS 7900, Makita DCS 6401, 6421 big bore cylinder kit 54mm
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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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5 of 5 February 27, 2024
Reviewer: Richard Sullivan from WALDEN, NY United States  


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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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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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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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5 of 5 Makita Big Bore April 21, 2018
Reviewer: Mike Lewman from Acworth, GA United States  
The only issue is the Compression Release valve is on the other side from my 6421.  So I had to cut a hole in the plastic.  Especially since the big bore kit really increased teh compression. installed everything & it started 2nd pull. Had to adjust carb... runs like a beast!  Cutting 32 inch pine like butter.

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5 of 5 BB kit March 5, 2018
Reviewer: Josh Butler from East Bend , NC United States  
Awesome kit.  Great quality and runs strong!

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5 of 5 Hyway Stihl MS362 Nikasil plated cylinder kit 47 March 2, 2018
Reviewer: Anonymous Person from Blanchard, ID United States  
Works as designed

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3 of 5 November 25, 2017
Reviewer: Kevin LeRoy from HARTFORD, NY United States  
Decompression hole is too shallow for the stock valve and it is on the opposite side of the cylinder. Had to make a hole on the left side plastic to use it.

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5 of 5 Dolkita big bore kit November 4, 2017
Reviewer: Anonymous Person from Boulder, CO United States  
This is a quality kit, nice fit and finish and it runs well. There was an extra 54mm ring. Only issue was that the decomp hole was tapped too shallow for an oem decomp. I plugged it.

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