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11. CRANKCASE/CRANKSHAFT

11-0

Bet & Win 2 50

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CRANKCASE/CRANKSHAFT

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SCHEMATIC DRAWING ---------------------------------------------- 11-1

SERVICE INFORMATION -------------------------------------------- 11-2

TROUBLESHOOTING ------------------------------------------------- 11-2

CRANKCASE SEPARATION ----------------------------------------- 11-3

CRANKSHAFT INSPECTION----------------------------------------- 11-4

CRANKCASE ASSEMBLY -------------------------------------------- 11-5

Summary of content (8 pages)

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11. CRANKCASE/CRANKSHAFT Bet & Win 250 SERVICE INFORMATION GENERAL INSTRUCTIONS • This section covers crankcase separation to service the crankshaft. The engine must be removed for this operation. • When separating the crankcase, never use a driver to pry the crankcase mating surfaces apart forcedly to prevent damaging the mating surfaces. • When installing the crankcase, do not use an iron hammer to tap it. • The following parts must be removed before separating the crankcase.
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11. CRANKCASE/CRANKSHAFT Bet & Win 250 Cam Chain Tensioner Slipper CRANKCASE SEPARATION Remove the cam chain tensioner slipper bolt. Remove the cam chain tensioner slipper and cam chain. Remove the three right crankcase attaching bolts. Bolt Cam Chain Remove the left crankcase. Left Crankcase Place the crankcase with the left crankcase down and remove the right crankcase from the left crankcase. ＊• Right Crankcase Never use a driver to pry the crankcase mating surfaces apart.
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11. CRANKCASE/CRANKSHAFT Bet & Win 250 Oil Seal Remove the oil seal from the left crankcase. Left Crankcase CRANKSHAFT INSPECTION Measure the connecting rod big end side clearance. Service Limit: 0.6mm replace if over Measure the connecting rod small end I.D. Service Limit: 17.
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11. CRANKCASE/CRANKSHAFT Bet & Win 250 Measure the crankshaft runout. Service Limit: 0.10mm replace if over Measure the crankshaft bearing play. Service Limits: Axial : 0.20mm replace if over Radial : 0.05mm replace if over Play Play Axial Radial CRANKCASE ASSEMBLY Clean off all gasket material from the crankcase mating surfaces. ＊• Avoid damaging the crankcase mating surfaces. Install a new oil seal into the left crankcase.
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11. CRANKCASE/CRANKSHAFT Bet & Win 250 Place the left crankcase down and install the crankshaft into the left crankcase. ＊• • seal. Avoid damaging the oil seal. Apply grease to the lip of the oil Gasket Install the two dowel pins and a new gasket. Dowel Pins Place the right crankcase over the crankshaft and onto the left crankcase. ＊• Right Crankcase Install the right crankcase squarely and do not tap it with an iron or plastic hammer.
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11. CRANKCASE/CRANKSHAFT Bet & Win 250 Cam Chain Tensioner Slipper Install the cam chain. Install the cam chain tensioner slipper. Install and tighten the cam chain tensioner slipper bolt. Torque: 7.8_ 11.