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PhatheadRacing

4.5 (123)

Yamaha YZ250 YZ250X WR250 Phathead cylinder head kit 1999-2026

Name: PhatheadRacing Yamaha YZ250 YZ250X WR250 Phathead cylinder head kit 1999-2026 - Yamaha YZ250 YZ250X WR250 Phathead cylinder head kit 1999-2026
Brand: PhatheadRacing
SKU: 46669779665035
Price: 350.0 USD
Availability: InStock
Rating: 5 (2 reviews)

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$350.00

Quantity

Color

Black

Quantity

Description

Yamaha YZ250 Phathead cylinder head kit 1999-2026
Chamber selection:

Y20 - 22cc Stock compression for the X model
Y21 - 21.1cc Stock (91+ octane)
Y22 - 20.1cc (100+ octane)

Y23 - 19.1cc (105+ octane)

YZ295 - 72mm 91+ octane 23.8cc
YZ296 - ...

Reviews

5.0

2 ratings

Really good pull in the mid and low range without loosing anything on the top end plus it fells like there is some improvement on the top end as well. Looks sweet on the bike to. Definitely worth the money!

Andrew · May 9, 2026