Independent Ignition Supplies - Specialist magneto component suppliers Online Catalogue : Tools Timing Disc (668) Stock Number 668 - Marked in degrees and intended to be fitted to crankshaft to obtain accurate timing. Particularly useful for motorcycle engines. Plastic, 190mm diameter. Price:  £5.85 (Excluding: VAT at 17.5%) Online Catalogue : Tools Independent Ignition Supplies - Specialist magneto component suppliers