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Allows the use of exhaust systems with 18mm O2 sensor bungs to be used with late model bikes with 12mm O2 sensors
1982-1983 Yamaha XV920 Virago
1984-1987 Ski-Doo Safari 377E
2001-2003 Harley Davidson FLSTSI Heritage Springer
Wiseco SK1306 Top End Kit - 0.50mm Oversize to 73.50mm body-fairing-accessories Allows the use of exhaustBore: 73. 50mm Sizing: 0. 50mm Oversize Cylinder sleeves must be purchased separately. Pro Lite. Cast Iron Bore. Contains all the necessary components for overboring or rebuilding your top end. Feature forged pistons, rings, wrist pins, circlips and top end gasket set. Vehicle Fitment: 2003 2004 Polaris 550 Classic 1999 2004 Polaris Sport Touring 1999 2003 Polaris Super Sport 1999 2008 Polaris Trail RMK 2000 Polaris Trail Touring 2003 2006 Polaris
