Big Bore Machined Cylinder Engine Motor Top Rebuild Kit that is compatible with the 1988-2000 Honda TRX 300 Fourtrax ATVs (big bore cylinder, piston, gaskets, spark plug, oil filter, motor oil)

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US$139.98
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US$139.98
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Free shipping Free 30-day returns

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Management number 234269685 Release Date 2026/06/27 List Price US$139.98 Model Number 234269685
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This is a big bore engine top end rebuild kit and machined cylinder that is compatible with your 1988-2000 Honda TRX 300 2x4 & 4x4 FW four-wheelers (this is for the Utility Model ATVs with the rack on the front and the back, NOT the race model ATVs). This kit includes: (1) New Cylinder that has been bored and honed to a big bore 6th oversize (75.5mm, .060). (2) A matched oversized piston and ring kit including piston, piston rings, pin and circlips. This ensures that when you receive this kit, everything is sized, machined and ready to bolt on. (3) A New Top End Gasket Kit. This kit includes not only the cylinder base and head gaskets, but also the exhaust gasket, both valve stem seals, rocker cover gasket, o-rings, etc. (4) A New Oil Filter With Sealing O-Rings. Sealing O-rings should always be replaced any time you rebuild your top end. You should always install a new oil filter to help insure longevity of your new top end rebuild kit. (5) A New NGK Spark Plug. (6) Three Quarts of 10W-40 Motor Oil. (7) Instructions for proper break-in procedures and cylinder preparation are included. (8) Free G&H Discount ATV Supply and Hi-Caliber Powersports Parts decals. Our kits are ready to bolt on with no modifications required. They come boxed in styrofoam and wrapped in bubble wrap for added protection.

  • This kit includes a new big bore size cylinder, new 6th oversize piston kit, new top end gasket kit, new oil filter with o-rings, new spark plug, and free decals
ASIN B0F236R7RB
Brand Hi-Caliber Powersports Parts
Model TRX 300 Fourtrax
Exterior Machined
Item Weight 16 pounds
Manufacturer Armor Tech, Shindy Mfg, NGK
Item model number TRX 300 Fourtrax
Product Dimensions 18 x 13 x 10 inches
Manufacturer Part Number CY131

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