717 Engines

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Section 04 ENGINE (2-STROKE) Subsection 04 (TOP END) 947 DI Engines Due to the semi-trapez rings, it is not possible to accurately measure ring/piston groove clearance. Ring End Gap Position ring halfway between exhaust port and top of cylinder. NOTE: In order to correctly position ring in cylinder, use piston as a pusher. Using a feeler gauge, check ring end gap. If gap exceeds specified tolerance, rings should be replaced. F01D0OA 1 1. Top of cylinder 2. Ring end gap Cylinder Base Gasket NOTE: The general procedure is to install a new gasket of the same thickness. However, if you do not know the gasket thickness that was installed or if a crank repair has involved replacement of connecting rods, refer to the COMBUS- TION CHAMBER VOLUME MEASUREMENT to properly determine the required gasket thickness. Different thicknesses of cylinder base gaskets are used for a precise adjustment of the combustion chamber volume. To identify gasket thickness, refer to the identification holes on the gasket. 2 F01D67A TYPICAL 1. Identification holes All Engines GASKET THICKNESS 1 IDENTIFICATION HOLES 0.3 mm (.012 in) 3 0.4 mm (.016 in) 4 0.5 mm (.020 in) 5 0.6 mm (.024 in) 6 0.8 mm (.031 in) 8 RAVE Valve 787 RFI and 947 DI Engines Check RAVE valve bellows no. 21 for cracks. ASSEMBLY Assembly is essentially the reverse of disassembly procedures. However pay particular attention to the following. RAVE Valve 787 RFI Engines Make sure to insert O-ring no. 23 onto rod of sliding valve no. 22. The TOP position of the sliding valve no. 22 is indicated on one side. 116 smr2004-Complete Line Up 18
F01D8KA 1 3 2 1. Sliding valve 2. O-ring 3. TOP Install a new gasket no. 24. It must be installed at the same time as the sliding valve no. 22. Position the valve housing no. 25 onto the cylinder so that its opening is toward the bottom. F01D8JB 1 1. Bottom of valve housing When the valve is mounted onto the cylinder, move the valve piston no. 20 to ensure the sliding valve no. 22 moves easily and does not stick. F01D8LA Section 04 ENGINE (2-STROKE) Subsection 04 (TOP END) 947 DI Engines Check the piston valve O-ring. Replace if necessary. F12D0ZA 1. Piston valve O-ring Check the sliding valve O-ring. Replace if necessary. smr2004-Complete Line Up 117 19 1
Page 1 and 2: TOP END 717 Engines Molykote 111 F1
Page 3 and 4: 947 DI Engines 26 10 N•m (89 lbf
Page 5 and 6: 2 3 1 F06D16B RAVE VALVE CLOSED 1.
Page 7 and 8: F06D0QA 1 1. Remove screws Remove R
Page 9 and 10: F06D28A 1. Remove O-ring 1 Remove s
Page 11 and 12: Remove cylinder head no. 2. If shel
Page 13 and 14: F00B0KA 1 1. Tool cut-out toward bo
Page 15 and 16: A F01D8AA 2 1. Measuring perpendicu
Page 17: F00B09A 2 1. Use the micrometer to
Page 21 and 22: - Replace the inner halves by the a
Page 23 and 24: 947 DI Engines Securecirclipinpisto
Page 25 and 26: F01D45A 717 ENGINES 1. Aligning cyl
Page 27 and 28: Apply Molykote 111 on threads of cy
Page 29 and 30: Compare the obtained value with the
Page 31 and 32: Section 04 ENGINE (2-STROKE) Subsec

717 Engines

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