Belle Minimix 150 G100 GXH50 to GX120 Conversion Kit. Upgrade your existing poorly performing G100 or GXH50 to a GX120 engine with this kit. Part No: 900/40400 – Mounting Plate & Bolts. Part No: 900/99927 – Belt Guard. Part No: 900/99944. Relevant Pulleys, Fixings, Woodruff Key. You will receive 1 of the 3 available. Parts manufactured by Altrad Belle in the United Kingdom. In good useable condition with wear and tear from normal use. The advertised price includes VAT. A full VAT receipt will be issued.