Vintage NGK B-10H spark plug featuring the extremely rare factory-set 1.5 mm electrode gap, intended for high-RPM air-cooled two-stroke engines.

Produced approximately in the late 1960s to early 1970s, based on heat range stamp style, JIS numbering, and packaging construction.

Compatible with high-performance engines including:

• Vintage kart engines

• Yamaha & Suzuki 2-stroke race motors

• High-compression air-cooled two-stroke motorcycles

• Early performance snowmobiles

Features:

• Genuine NGK Japan production

• Rare yellow-bronze nickel aging consistent with pre-1980 plugs

• Correct period crimp style and insulator font

• Factory 1.5 mm gap (very uncommon on cold heat-range plugs)

An excellent choice for vintage racing restoration, collection, or performance tuning requiring cold-range, wide-gap ignition components.

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Item Specifics

• Brand: NGK

• Model: B-10H

• Country/Region of Manufacture: Japan

• Heat Range: 10 (extra cold)

• Electrode Gap: Factory 1.5 mm

• Thread Size: 14mm

• Type: Standard Nickel Spark Plug

• Vintage: Yes

• For Engine Type: 2-Stroke