Yamaha IT490 Lectron Big-Air Billetron - 40mm 2-Stroke Carburettor Taylor & Dyna Ignition Leads they are made from a

they are made from a superior bronze aluminium material for better wear and heat transfer characteristics compared to the oem guides

installed heights

weighing in at just 505 grams excluding pads and pin

Complete with rings/buttons and head gasket

set rev limts

Yamaha IT490 Lectron Big-Air Billetron - 40mm 2-Stroke Carburettor Taylor & Dyna Ignition Leads they are made from aThe 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