VHM Yamaha YZ250 99-22 / YZ250X 16-22 Cylinder Head Insert

Exchangeable combustion chamber insert for VHM cylinder head AA33080. Each insert has a different combustion chamber volume, so the compression and power delivery can be set up for the track, conditions and fuel. The last digits of the part number are engraved on the insert.

FITS

• 20.20cc - AE32021-C (higher compression): Yamaha: YZ250 99-22
• 20.60cc - AE32021-B (VHM standard for YZ250): Yamaha: YZ250 99-22
• 21.00cc - AE32021-009 (lower compression): Yamaha: YZ250 99-22
• 21.80cc - AE32021-092 (VHM standard for YZ250X): Yamaha: YZ250X 16-22

OPTIONS

• 20.20cc - AE32021-C (higher compression)
• 20.60cc - AE32021-B (VHM standard for YZ250)
• 21.00cc - AE32021-009 (lower compression)
• 21.80cc - AE32021-092 (VHM standard for YZ250X)

FEATURES

• Smaller volume (higher compression): more bottom-end and mid-range, suits deep sand, needs good fuel to avoid detonation
• Larger volume (lower compression): more over-rev and top speed, suits hard-pack
• Quick to change at the track

Fits VHM cylinder heads only, not the OEM head. The head and its O-ring kit are sold separately.

Flat rate shipping is $15.00 and orders over $149.00 ship free. Bulky products are $50.00 flat rate and are excluded from free shipping.

30 day returns on all non-clearance items, in original unused condition with packaging intact. Sale and clearance items are final sale.

Most stock is held off-site, so in-store pick-up needs to be arranged first — call (04) 2438 8401. Pick-ups are usually ready in 2-3 days.