VHM Yamaha YZ125 22-25 Cylinder Head Insert

Exchangeable combustion chamber insert for VHM cylinder head AA33203. 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

• Yamaha: YZ125 22-25

OPTIONS

• 10.80cc - AE32327-B (higher compression)
• 11.00cc - AE32327-C (higher compression)
• 11.20cc - AE32327-E (VHM standard, hard-pack tracks)
• 11.40cc - AE32327-F (VHM standard, deep sand)
• 11.60cc - AE32327-G (lower compression)
• 11.80cc - AE32327-H (lower compression)

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.