You have to pull the rear (muffler end) cover, rear muffler protector (the metal vent), the rear handle, the lower end plate, and the fiber muffler protector so you have access to the head cover. Remove the head cover, disconnecting the breather tube as you do it. Turn the engine (using pull handle) to top dead center compression (both valves fully closed). Use feeler gauge to check the valve clearance between the rocker arm and the valve stem. Intake should be .15mm +/- .02mm (.006in +/- .001) Exhaust should be .20mm +/- .02mm (.008in +/- .001) Adjust as needed by loosening the rocker arm pivot locking nut and adjusting the rocker arm pivot. Tighten the locking nut once set. Put it all back together. :)
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You have to pull the rear (muffler end) cover, rear muffler protector (the metal vent), the rear handle, the lower end plate, and the fiber muffler protector so you have access to the head cover. Remove the head cover, disconnecting the breather tube as you do it.
Turn the engine (using pull handle) to top dead center compression (both valves fully closed). Use feeler gauge to check the valve clearance between the rocker arm and the valve stem.
Intake should be .15mm +/- .02mm (.006in +/- .001)
Exhaust should be .20mm +/- .02mm (.008in +/- .001)
Adjust as needed by loosening the rocker arm pivot locking nut and adjusting the rocker arm pivot. Tighten the locking nut once set.
Put it all back together. :)