2008 Arctic Cat ATVs factory service and repair manual, Page 279Get this manual
Remove the coolant bypass hose from the cylinder head fitting; then remove the coolant crossover hosei Chain
Failure to hold the cam chain idler shim against the cam chain idler shaft may result in the shim falling into the engine resulting in severe engine damage
11Remove the cam chain idler from the cam chain; then support the cam chain to prevent it from dropping into the crankcase