Yamaha IT490 Lectron Big-Air Billetron - 40mm 2-Stroke Carburettor Taylor & Dyna Ignition Leads These are for the single

These are for the single rocker shim type motors

5mm Over Size: +2mmComp Ratio: 12:5:1Gram Wt (g): 127Skirt Style: FSR Machined from 2618 T6 high tensile forged aluminium Dome/Dish features smooth flowing radii and require no deburring or preparation JE designs are specifically engineered for extreme applications including Professional competition Pins

The hexagonal muffler improves your bike's appearance

Easy to install

Yamaha IT490 Lectron Big-Air Billetron - 40mm 2-Stroke Carburettor Taylor & Dyna Ignition Leads These are for the singleThe BILLETRON Big Air is designed specifically to maximize performance in big bore two strokes while continuing in the simplicity and technology of Lectron heritage. Gain peak performance, lose the jets. The BILLETRON Big Air builds on the existing two fuel circuit system of the legacy Lectron products. Continuing with Lectron Metering Rod Technology and the Adjustable Power Jet fuel circuit for top end fuel adjustment, the BILLETRON Big Air