Gunson G4055B Colortune / Hi Gauge Adaptor Kit 12mm

The Green Spark Plug Company

This kit converts the thread on Colortune and Hi Gauge Compression Tester to fit most popular sizes of spark plugs fitted to most modern and classic cars, motorcycles, garden machinery and boats. Contents 1 x Thread Adaptor 12mm 1 x Gas Seal Washer Adapter 14mm to 12mm Two Stroke motorcycles Suitable for use with gunson G4101 Extends the use of your compression tester Ideal for classic motorcycles

Amazon

Adaptor for Hi-Gauge Compression Tester, Part No. G4101 and Colortune, Part No. G4074. Thread size: 14mm to 12mm. Suitable for classic motorcycles and two stroke engines. Kit contains: 14mm to 12mm thread adaptor, gas seal washer and hex key. Other adaptors available, Part Nos. G4055A (10mm), G4055C (14mm tapered seat), G4055D (14mm long reach) and G4055E (18mm).