crankshaft problem bushing - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 5 (permalink) Old 03-16-2010, 10:45 AM Thread Starter
the reaper
 
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crankshaft problem bushing

HI, i have trouble finding this part is located in the halvies of the cranckshaft is like a bushing, i dont fint it in any catalog ,the mechanics say that this bushing is wrong and that cause that when the engine is hot is hard to start , too much thanks i want my baby back on road
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post #2 of 5 (permalink) Old 03-16-2010, 04:53 PM
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Originally Posted by lagarton77 View Post
HI, i have trouble finding this part is located in the halvies of the cranckshaft is like a bushing, i dont fint it in any catalog ,the mechanics say that this bushing is wrong and that cause that when the engine is hot is hard to start , too much thanks i want my baby back on road
It appears that some debris got between the crankshaft and engine case and damaged the case or the engine has alot of miles on it. The crank bearing is correct and on this engine the case is machined to act as a thrust bearing to limit end play. When you get too much end play your engine case is now junkand must be replaced.

A new case is over $1,000 but here is a good used one on Ebay for less than $80.00 shipped. If you are outside the U.S. they ship worldwide.

Make sure your mechanic replaces the balance dampers when he puts it back toghether.

Engine case

http://cgi.ebay.com/ebaymotors/1986-...Q5fAccessories


85 VN700 "Old Yella"

REBUILT ENGINE
CUSTOM PAINT
VANCE & HINES CRUZERS
EAR SHAVED AND RE-JETTED W/K&N'S
DUNLOP ELITE K591 FRONT & REAR
VOLTMETER
SYNTHETIC BRAKE FLUID
SYNTHETIC OIL & GEAR LUBE
PLEXISTAR 2 WINDSHIELD
SPLINES LUBED
ACCT'S GREASED W/TOC SPRINGS
COASTERD
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LEATHER TOOL AND ROLL BAG
PICKUP COILS GAPPED AT .018"
NGK CAP, WIRES, IRIDUMS
BARNETT FRICTION PLATES & SPRINGS
CUSTOM GRIPS, MIRRORS, LEVERS
ORIGINAL STATOR & R/R 14.5v
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Last edited by lance328; 03-17-2010 at 01:56 AM.
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post #3 of 5 (permalink) Old 03-16-2010, 11:55 PM Thread Starter
the reaper
 
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woww youre my heroe thanks man , dude but that case is a modified version to use other bearing what is the diference thanks
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post #4 of 5 (permalink) Old 03-17-2010, 01:51 AM
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Originally Posted by lagarton77 View Post
woww youre my heroe thanks man , dude but that case is a modified version to use other bearing what is the diference thanks
Both cases are exactly the same, they have the same factory installed bearings and no modifications have been done. The reason Kawasaki does not sell the main crankshaft bearing is by the time the bearing fails the machined surface for crankshaft end play will be out of spec. so you will need to replace the case.

I still reservations that the wear on the thrust bearing would cause hard starting when hot. These engines are known to have hard starting problems when hot, replacing the flooded lead acid battery with an MF AGM battery and NGK Iridium spark plugs normaly solves the problem. I hope your mechanic did not tear down your engine for nothing.


85 VN700 "Old Yella"

REBUILT ENGINE
CUSTOM PAINT
VANCE & HINES CRUZERS
EAR SHAVED AND RE-JETTED W/K&N'S
DUNLOP ELITE K591 FRONT & REAR
VOLTMETER
SYNTHETIC BRAKE FLUID
SYNTHETIC OIL & GEAR LUBE
PLEXISTAR 2 WINDSHIELD
SPLINES LUBED
ACCT'S GREASED W/TOC SPRINGS
COASTERD
LEATHER SADDLE BAGS
LEATHER TOOL AND ROLL BAG
PICKUP COILS GAPPED AT .018"
NGK CAP, WIRES, IRIDUMS
BARNETT FRICTION PLATES & SPRINGS
CUSTOM GRIPS, MIRRORS, LEVERS
ORIGINAL STATOR & R/R 14.5v
DEKA MF AGM ETX15L

Best Auto/Moto Insurance | Motorcycle Protection Today | FREE Trade-In Quote

Last edited by lance328; 03-17-2010 at 02:08 AM.
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post #5 of 5 (permalink) Old 03-17-2010, 03:16 AM
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With use of a strainer AND a filter, I just can't imagine how you would get "stuff" into that bushing are to do any damage!

Do the plug thing that Lance mentioned and the battery.

Also set the air gap on the stator to around .020. That cured my hot start problems.........period.

Good luck
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