Beta RR 4T-400 - Section 7

CONTENTS
IMPORTANT NOTE ABOUT
CRANKCASE SERVICING . . . . . . . . . Chap. 6 - 29
Left-hand crankcase half . . . . . . . . . . Chap. 6 - 30
Right-hand crankcase half . . . . . . . . . Chap. 6 - 31
Desmodromic mechanism ball bearing 3 Chap. 6 - 32
“60” oil jet 8 . . . . . . . . . . . . . . . . . . . . Chap. 6 - 32
“100” oil jet 1 . . . . . . . . . . . . . . . . . . . . Chap. 6 - 33
By-pass valve . . . . . . . . . . . . . . . . . . . Chap. 6 - 33
Clutch cover . . . . . . . . . . . . . . . . . . . . Chap. 6 - 33
Crankshaft oil seal 4 . . . . . . . . . . . . . . Chap. 6 - 33
Oil channel 5 . . . . . . . . . . . . . . . . . . . . Chap. 6 - 33
Crankshaft . . . . . . . . . . . . . . . . . . . . . . Chap. 6 - 34
Countershaft gear . . . . . . . . . . . . . . . . Chap. 6 - 35
Compensating for the
crankshaft axial play . . . . . . . . . . . Chap. 6 - 35
Cylinder - Nikasil lining . . . . . . . . . . . . Chap. 6 - 36
Measuring the piston and the cylinder -
Determining the piston fit . . . . . . . Chap. 6 - 36
Checking the piston . . . . . . . . . . . . . . Chap. 6 - 37
Checking the piston rings
and their gaps . . . . . . . . . . . . . . . . Chap. 6 - 37
Checking the oil pumps for wear . . . . Chap. 6 - 37
Lubrication system . . . . . . . . . . . . . . . Chap. 6 - 38
Cylinder head top . . . . . . . . . . . . . . . . Chap. 6 - 39
Rocker arm pins 5 and 6 . . . . . . . . . . . Chap. 6 - 39
Rocker arm rollers 8 . . . . . . . . . . . . . . Chap. 6 - 39
Adjusting screws 9 . . . . . . . . . . . . . . . Chap. 6 - 39
Decompressor shaft 2 . . . . . . . . . . . . . Chap. 6 - 39
Cylinder head . . . . . . . . . . . . . . . . . . . Chap. 6 - 40
Sealing surface . . . . . . . . . . . . . . . . . . Chap. 6 - 41
Valve guides . . . . . . . . . . . . . . . . . . . . Chap. 6 - 41
Valve seats . . . . . . . . . . . . . . . . . . . . . Chap. 6 - 41
Valves . . . . . . . . . . . . . . . . . . . . . . . . . Chap. 6 - 41
Valve springs . . . . . . . . . . . . . . . . . . . Chap. 6 - 41
Valve springs for the 250 cc model . . Chap. 6 - 41
Valve stem linings . . . . . . . . . . . . . . . . Chap. 6 - 41
Camshaft . . . . . . . . . . . . . . . . . . . . . . . Chap. 6 - 42
Preassembling the camshaft . . . . . . . Chap. 6 - 43
Automatic stretcher . . . . . . . . . . . . . . Chap. 6 - 44
Valve gear control . . . . . . . . . . . . . . . . Chap. 6 - 44
Checking the clutch for wear . . . . . . . Chap. 6 - 45
Checking the kickstart for wear . . . . . Chap. 6 - 46
Preassembling the kickstart shaft . . . Chap. 6 - 46
Gearshift mechanism . . . . . . . . . . . . . Chap. 6 - 47
Preassembling the shaft
of the gearshift mechanism . . . . . . Chap. 6 - 47
Gearbox . . . . . . . . . . . . . . . . . . . . . . . Chap. 6 - 48
Assembling the driving shaft . . . . . . . Chap. 6 - 48
Gearbox . . . . . . . . . . . . . . . . . . . . . . . . Chap. 6 - 49
Assembling the driven shaft . . . . . . . . Chap. 6 - 49
Ignition system . . . . . . . . . . . . . . . . . . Chap. 6 - 50
Checking the stator and the pick-up . Chap. 6 - 50
Replacing the stator . . . . . . . . . . . . . . Chap. 6 - 50
Electric start gears . . . . . . . . . . . . . . . Chap. 6 - 51
Checking the operation
of the free wheel . . . . . . . . . . . . . . Chap. 6 - 52
Replacing the free wheel hub . . . . . . . Chap. 6 - 52
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Manuale di Officina RR 4T - 400 - 450 - 525
65_Inghilterra_059311 27-12-2007 18:28 Pagina 28