Wiseco Yamaha YZ 400 77-78/IT 40077-78 3386TD Piston Kit

Wiseco Yamaha YZ 400 77-78/IT 40077-78 3386TD Piston Kit

Marsoni

M251S

$107.67

Get it in 3 business days with 1 day shipping. Friday, May 29

Wiseco Yamaha YZ 400 77-78/IT 40077-78 3386TD Piston KitClassic Forged 2 stroke pistons are perfect for those looking to rebuild their 2 stroke engine with reliable, high quality components. These pistons cover a wide range of Powersports rebuilds, including vintage motocross models, classic street bikes, and snowmobiles. The forged material improves tensile strength over cast pistons, ensuring refreshed performance on the track or the trail. This Part Fits: Year Make Model Submodel 1977 1978 Yamaha IT400

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Perfect fit for my 23 MDX, easy to install and great value for money. Dealership quoted me a ridiculous amount to replace the air filter. I would recommend everyone to DIY. Bought it together with the cabin air filter. Will definitely keep an eye on longevity. These are washable so probably wont need to buy for at least a couple years.

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Reviewed in the United States on November 10, 2025