Ducati Monster Forum

Moto Board => Tech => Topic started by: jimmygomk3 on May 19, 2009, 06:50:44 AM

Title: HELP ME PLEASE! Bike will not turn off!
Post by: jimmygomk3 on May 19, 2009, 06:50:44 AM
bike in question - 01 M750 carb'd.  started her up for work (everything fine), rode to work, parked (kick stand up, bike in neutral), proceeded to turn the key to kill the bike and she stayed on.  It sounds like the starter is stuck.  I tried the kill switch (did nothing) and i checked the stater button (which i know sometimes sticks but its not).  I pulled the seat off and yanked out the starter fuse and master fuse and the damn thing kept turning.  Then i lifted the tank and detached the ground from the battery which finally killed her. 

Any thoughts?  ignition? starter?  Please help...
Title: Re: HELP ME PLEASE! Bike will not turn off!
Post by: ducpainter on May 19, 2009, 07:11:15 AM
Quote from: jimmygomk3 on May 19, 2009, 06:50:44 AM
bike in question - 01 M750 carb'd.  started her up for work (everything fine), rode to work, parked (kick stand up, bike in neutral), proceeded to turn the key to kill the bike and she stayed on.  It sounds like the starter is stuck.  I tried the kill switch (did nothing) and i checked the stater button (which i know sometimes sticks but its not).  I pulled the seat off and yanked out the starter fuse and master fuse and the damn thing kept turning.  Then i lifted the tank and detached the ground from the battery which finally killed her. 

Any thoughts?  ignition? starter?  Please help...
Starter solenoid...

under the battery box...r/h (throttle0 side.

You can see the 2 cables going to it. One from the battery, one to the starter.
Title: Re: HELP ME PLEASE! Bike will not turn off!
Post by: jimmygomk3 on May 19, 2009, 07:15:33 AM
difficult to replace?  expensive part?
Title: Re: HELP ME PLEASE! Bike will not turn off!
Post by: GLantern on May 19, 2009, 07:18:46 AM
And next time just put it in 2nd or 3rd gear and let out the clutch without any gas, that will turn it right off.
Title: Re: HELP ME PLEASE! Bike will not turn off!
Post by: larsson77 on May 19, 2009, 07:23:07 AM
Ca-Cycleworks sells one for Yamaha for 42,-$. It is a direct replacement. Installation is pretty easy.

http://www.ca-cycleworks.com/shop/catalog/ducati/elec.html (http://www.ca-cycleworks.com/shop/catalog/ducati/elec.html)
Title: Re: HELP ME PLEASE! Bike will not turn off!
Post by: Mash on May 19, 2009, 07:36:29 AM
I have this problem occasionally, but it only seems to happen on sunny, beautiful days with temps in the 70's.
Title: Re: HELP ME PLEASE! Bike will not turn off!
Post by: jimmygomk3 on May 19, 2009, 07:51:12 AM
thanks guys.  [thumbsup]  anyone know of a DIY online?  I am not the most technically savvy guy...  what bike is that yamaha relay off of??? i would like to buy something local (chicagoland) seeing as though the bike is my only mode of transportation...
Title: Re: HELP ME PLEASE! Bike will not turn off!
Post by: silentbob on May 20, 2009, 06:56:04 AM
Quote from: GLantern on May 19, 2009, 07:18:46 AM
And next time just put it in 2nd or 3rd gear and let out the clutch without any gas, that will turn it right off.

Not when the solenoid is stuck.
Title: Re: HELP ME PLEASE! Bike will not turn off!
Post by: GLantern on May 20, 2009, 06:59:16 AM
Quote from: silentbob on May 20, 2009, 06:56:04 AM
Not when the solenoid is stuck.

It won't stall it out?  Does the starter solenoid feed the engine gas?  Please explain
Title: Re: HELP ME PLEASE! Bike will not turn off!
Post by: larsson77 on May 20, 2009, 07:38:16 AM
The engine turns off but the starter won't, because the starter magnet stucks. You can hit it with a screwdriver so the magnet gets loose and the starter turns off.
Title: Re: HELP ME PLEASE! Bike will not turn off!
Post by: silentbob on May 20, 2009, 07:50:27 AM
Quote from: GLantern on May 20, 2009, 06:59:16 AM
It won't stall it out?  Does the starter solenoid feed the engine gas?  Please explain

It keeps cranking.  Even if you were able to hold the starter motor back with the brakes, it would start cranking again as soon as you released them.
Title: Re: HELP ME PLEASE! Bike will not turn off!
Post by: GLantern on May 20, 2009, 08:20:41 AM
Quote from: silentbob on May 20, 2009, 07:50:27 AM
It keeps cranking.  Even if you were able to hold the starter motor back with the brakes, it would start cranking again as soon as you released them.

Ahhh ok i get it, man that is a helluva pickle!  [laugh]
Title: Re: HELP ME PLEASE! Bike will not turn off!
Post by: silentbob on May 20, 2009, 08:38:57 AM
Yeah it happened to me on my S4R.  I put it in neutral, unlocked the seat, turned the ignition back on so it would start, and then got out the screwdriver, disconnected the negative battery cable, and shut off the bike.  The starter is connected through a one way sprag clutch.  So if the engine is running, there is no stress on the starter.  If you let it crank with the engine off you will quickly melt cables or burn out the starter.
Title: Re: HELP ME PLEASE! Bike will not turn off!
Post by: NAKID on May 21, 2009, 07:36:58 AM
Had that happen to me once. I had a multi tool under the seat at the time and I disconnected the starter wire directly. Reconnected and it never happened again...