Wiseco Motorcycle Off Road, 2 Stroke Bottom End Gasket Kit - '95-97 Yamaha YZ250

Wiseco Motorcycle Off Road, 2 Stroke Bottom End Gasket Kit - '95-97 Yamaha YZ250

Marsoni

M251S

$120.30

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

Wiseco Motorcycle Off Road, 2 Stroke Bottom End Gasket Kit - '95-97 Yamaha YZ250WISECO BOTTOM END GASKET KIT Wiseco gasket kits are made from the highest quality materials and engineered by Wiseco to ensure compatibility with Wiseco pistons and crankshafts FEATURES Contains all the necessary gaskets, seals and O rings to rebuild your bottom end Ensures a critical seal and superior durability that meets and exceeds OEM specifications Note: Image for reference only product may vary slightly for fitment

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Appears to be well made, alignment bar slides in nicely. As stated, you need to drill a hole in the bar for the gimble bearing driver, the directions are not clear, what I did was before I take out the old gimble bearing, put an O ring on the bar close to the last step on the bar, slide the bar all the way in, then carefully slide the bar out, this marks the distance from the back of the gimble bearing to where the shaft on the outdrive bottoms out, move the O ring a 1/4” towards the stepped part of the alignment tool (this is so you won’t bottom out the alignment tool when driving the gimble bearing in) then slide the driver puck up to the O ring and use a 3/8” diameter transfer punch through the side hole in the puck to mark the bar. You need to drill a 3/8” diameter hole in the alignment bar, two V blocks, some clamps, and a drill press will make drilling much easier, after the bar is securely mounted and centered in the drill press, use a center drill, then 1/4” drill first, using plenty of oil, drill all the way through, then use the 3/8” drill, deburr both sides and you should be good to go. People complain that it doesn’t come pre-drilled, the reason is that not all out drives are the same so you have to fit it to the outdrive that you have. Fortunately, I have a machine shop at my house and have a jig setup with various drill bushings, but the method I described above should work for you. Just make sure you’re perfectly centered and secure before you start drilling.

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Reviewed in the United States on April 16, 2026

Verified Purchase

Nancy filippi

Louisville, US

★★★★★ 5

A must pull your gimbal bearing

You do need to drill a hole but worked perfect

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on December 26, 2025