• Remove cover for Hall generator. • Only crank engine at the crankshaft (counter- clockwise!). • Measure valve clearance with feeler gauge. • Max. engine temperature 35 °C. • Determine the replacement tappet by way of nominal/actual value comparison. • Lock chain tensioner and timing chain in position with eccentric tensioner, BMW No. 11 2 640 . • Pull back clamping pin (1), screw in eccentric pin (2) by 3-4 turns. • Push in clamping pin above the timing chain. • Fix timing chain and chain tensioner in position by slightly turning eccentric pin in clockwise di- rection. • Secure eccentric pin with locknut (3). Valve clearance:
Inlet.................0.15 - 0.20 mm (0.0059 - 0.0079 in) Exhaust ...........0.25 - 0.30 mm (0.0098 - 0.0118 in) Adjusting valve clearance Removing sprockets • The camshafts must be removed in order to change the bucket tappets. • Set cylinder No. 1 (timing end) to ignition TDC. • Release retaining bolts of sprockets and remove sprockets. Removing camshafts • The setting device for the camshafts, BMW No. 11 3 700 , must fit in the slots at the ends of the shafts. • Unscrew screw plug in chain case cover. • Remove chain guide from stud bolt. • First remove thrust bearing of camshafts to avoid misalignment. • Remove remaining camshaft bearings and lift out camshaft.
• Remove bucket tappets to be changed with relay pliers BMW No. 61 1 250 , or a magnet. 00.20 Checking valve clearance and adjusting if necessary Inspections I, III e Caution: Never unscrew the spark plugs before measuring the valve clearance. Carbon particles may settle be- hind an exhaust valve head and falsify the measured result. 1 11 2 640 • [RS] Remove bottom section of fairing . • Remove left side section of fairing. • Remove cylinder head cover. 2 3 LT000200 LT000200 1 LT00021 LT00021 0 11 3 700 LT00019 LT00019 0