Crankshaft/Piston/Transmission; Crankcase Combination; Crankcase Separation - Honda Magna VF750C Service Manual

Service Information
Troubleshooting

Crankcase Separation

Crankshaft/Connecting Rod Removal/
Installation
Piston Disassembly
Transmission Removal/Installation
Mainshaft Disassembly
Service I nformation
Th is section cove rs cra n kcase sepa ratio n for service of the cra n kshaft, cyl i n d e r sl eeve, piston a n d transm issio n .
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The fol l owing pa rts m u st be removed before servici ng.
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Service Item
Con necting rod
Cra n ks haft
Tra n s m ission
M a rk a n d store the bea ring i nse rts fo r reasse mbly. If the i nserts � re i m properly i n sta l led they wi l l block the o i l h oles,
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ca using insufficient l u brication and eventua l engine se izu re .
Prior to asse m b l i n g the cra n kcase ha lves a pply a sea lant to the i r mati ng s u rface. Wi pe off excess sea l a nt thoro u g h ly.
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M a rk a n d store the d i sasse m bled pa rts to ensure that they a re re insta l led i n their o r i g i n a l l ocati ons.
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Remove the piston, cyl i nder s leeve a n d connecting rod as an asse m b ly.
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Be ca refu l not to damage the cra n kshaft m a i n journal bea ring wh i l e rem ovi ng or i n sta l l i n g the cra n kshaft.
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A l l bea ring i nserts a re select fitted and a re identified by co lor code. Select replacem e nt bea rings fro m the selection
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table (page
1 1 - 1 6) .
After i n sta l l i ng new bea rings, recheck them with plastigauge to verify cleara nce.
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Apply m o lybde n u m disu lfide o i l to the m a i n j o u rnals a n d cra n kpins d u ri n g asse m b ly.
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Troubleshooting
Cylinder Compression Is Too Low, Or Engine Is Hard To
Start
Wo rn, stuck or broken piston ring
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Worn or da maged cyl inder or piston
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Cylinder Compression Is Too High, Or Engine Overheats
Or Knocks
Carbon deposits on the cyl i n der head a n d/o r piston
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Piston Sounds
Worn cyl i n d e r, piston and/or piston ring
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Worn piston p i n hole a n d piston p i n
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W o r n con n ecti ng rod s m a l l end
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Excessive Smoke
Worn, stuck or broken piston ring
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Weak va lve ste m sea l
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Excessive Noise
Worn connecti ng rod big-end bea ring
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Bent connecti ng rod
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Worn cra n kshaft m a i n bearing
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Worn transm ission bea ring
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1 1 .
Cra n kshaft/ Piston /Tra nsmissio n
1 1 - 1
1 1 - 1
1 1 -2
1 1 - 4
I
1 1 -6
Assembly
1 1 -8
I
1 1 - 1 0
Assembly
Cyl i nder head ( page
8-2)
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Piston ( page
1 1 -6)
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Sta rter cl utch ( page
1 7- 1 0)
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Cra n kcase separation ( page
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Gea rshaft l i n kage ( page
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Countershaft Disassembly

Crankcase Combination

Crankshaft Bearing Replacement
Connecting Rod Selection
Liquid Sealant Application
Crankcase Bolt Location
Removed Components
Cra n kcase sepa ration ( page
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F lywheel (page
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Connecti n g rod bea ring ca p (page
1 h2)
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Cra n kcase sepa ratio n ( page
1 0-4)
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Engine Vibration
Excessive cra n kshaft ru n o ut
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Hard To Shift
I m p roper cl utch operation
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I ncorrect transm issi o n o i l wei g ht
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I ncorrect c l utch adjustment
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Bent s h ift fork
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Bent fo rk shaft
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Bend fork claw
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Da maged s h ift d ru m ca m g rooves
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Bent s h ift spi n d l e
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Transmission Jumps Out
Worn gear dogs or slots
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Bent fork shaft
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B ro ken s h ift d r u m stopper
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Worn or bent s h ift forks
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B roken s h ift l i nkage return spri ng
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Worn gear s h ift fork claw
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I
1 1 - 1 2
Assembly
1 1 - 1 4
1 1 - 1 6
1 1 - 1 8
1 1 - 1 8
1 1 - 1 8
1 1 -2)
1 5- 1 0)
1 1 -4)
1 1 -2)
Of
Gear
1 1 - 1