99 YZ250 big bore kit question

Scottmc2468
Posts
5
Joined
3/24/2024
Location
Sussex, NJ US

Hey hey, newbie here so thanks in advance for help. My son purchased the below big bore kit for his 99 YZ250. Long story but we damaged the piston and need to replace with new. I’ve had zero luck contacting the manufacturer to buy. The piston is marked 71.94. Is it possible to buy just this seperate online? 
IMG 0788

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3/24/2024 1:52pm

I think the Magnum kits are coming with Namura pistons now. Eric Gorr Racing - Big Bore Master List (eric-gorr.com) is supposed to be the designer, so you might contact him, or HOME | magnumdistributing, but I'm sure you can use a WISECO or VERTEX YZ big bore piston in that cylinder. Cast Big Bore Piston Kit For Yamaha XX 250 2022-2023, YZ 250 1999-2023; 24079A | eBay

1
walent215
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2422
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12/6/2014
Location
Ridgecrest, CA US
3/24/2024 7:30pm

Pm me for exact replacement if still looking 

1
Scottmc2468
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5
Joined
3/24/2024
Location
Sussex, NJ US
3/24/2024 8:50pm

Thanks guys will check these all out and let ya know how it works out! 

The Shop

walent215
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2422
Joined
12/6/2014
Location
Ridgecrest, CA US
4/14/2024 4:58pm

I’ve got 4 optional pistons available 

Wossner included 

PM if interested 

1
Scottmc2468
Posts
5
Joined
3/24/2024
Location
Sussex, NJ US
4/21/2024 11:48am

Update: purchased this piston/rings to replace damaged on big bore kit. Install went fine. bikes back to running like a top last two days. 
thanks for the help gents! 

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