KOSO NORTH AMERICA Banjo Bolt Kit - Big Bore - Grom MO623100 Silencer Plug Some applications will require spacers

Some applications will require spacers to make proper clearances

2007-2011 Yamaha WR 450 F - Notes: 2007-2010Must use YZ250F/450F '06-'09 shrouds

EX400 18-22

With this kit and your flashed ECU you can downshift smoother than would otherwise be possible without pulling the clutch

KOSO NORTH AMERICA Banjo Bolt Kit - Big Bore - Grom MO623100 Silencer Plug Some applications will require spacersOptional camshaft kit can be used with stock engine, but delivers improved results when used with 170cc Big Bore kit Banjo bolt kit designed for 170cc big bore kit Includes ceramic coated cylinder, 61mm forged piston, rings, pin, gasket kit and banjo bolts Compression ratio of 11. 5 to 1