Hi
can anyone help with common reasons (things to look for) for the starter sprag clutch failing (free wheeling) in a MHR Mille cause i'm on my third!
Thanks
duck-a-tye
Sprag clutch failures
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- Mariana
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- Location: Australia
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- 750 SS Greenframe - the holy grail
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- Location: The Netherlands, Europe.
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- 750 SS Greenframe - the holy grail
- Posts: 500
- Joined: Fri Aug 13, 2004 2:12 am
- Location: The Netherlands, Europe.
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- Mariana
- Posts: 42
- Joined: Fri May 28, 2004 2:52 am
- Location: Australia
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- 750 SS Greenframe - the holy grail
- Posts: 500
- Joined: Fri Aug 13, 2004 2:12 am
- Location: The Netherlands, Europe.
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- Mariana
- Posts: 42
- Joined: Fri May 28, 2004 2:52 am
- Location: Australia
I hate to admit it, but it hasn't run since 2005! I stripped it down to repaint the frame and tidy up the motor, and just then the missus decided she wanted two more rooms on the house!!!!!
This years just about finished, but hopefully 2008 will see some work being done on it.
Lucky I've got the 750 sport for the times when I'm let of the leash
Barry
This years just about finished, but hopefully 2008 will see some work being done on it.
Lucky I've got the 750 sport for the times when I'm let of the leash
Barry
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- 750 SS Greenframe - the holy grail
- Posts: 500
- Joined: Fri Aug 13, 2004 2:12 am
- Location: The Netherlands, Europe.
Barry,
After endless starting problems with my Mille, and having this discussed on a Dutch Bevel forum, I found a sollution.
Varta LF 518902026 battery
12V 18Ah and......260A cold crancking power!!!!
This battery is actualy a little smaller than original, so the hold down strap will not fit, you have to make a shorter one yourself.
The battery, USA made, is actualy made for certain Harley models....!
www.varta.com
Now I have the power to start the engine time after time, even if it doesn't fire right up!
After endless starting problems with my Mille, and having this discussed on a Dutch Bevel forum, I found a sollution.
Varta LF 518902026 battery
12V 18Ah and......260A cold crancking power!!!!
This battery is actualy a little smaller than original, so the hold down strap will not fit, you have to make a shorter one yourself.
The battery, USA made, is actualy made for certain Harley models....!
www.varta.com
Now I have the power to start the engine time after time, even if it doesn't fire right up!
- BevHevSteve
- SITE OWNER
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- Location: Lafayette, California
- Contact:
the SVR20 battery I sell has 300 CCAs - and it is a sealed AGM battery which means NO SPILLS and NO MAINTENANCE.
You typically screw up the starter sprag when your engine is not in tune - it backfires while you are turning the starter and your sprag bearing is toast.
The answer is to rebuild your carbiew at least every 2 years with new seal kits etc, and, pay close attention to carb sync
You typically screw up the starter sprag when your engine is not in tune - it backfires while you are turning the starter and your sprag bearing is toast.
The answer is to rebuild your carbiew at least every 2 years with new seal kits etc, and, pay close attention to carb sync
![Image](https://bevelheaven.com/pix/s-ncr-logo-new.jpg)
Steve Allen (925)798-BEVL[2385] Ride'm, Don't Hide'm
Ducati/Euro Spares -> https://Store.BevelHeaven.com
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- Mariana
- Posts: 42
- Joined: Fri May 28, 2004 2:52 am
- Location: Australia
Thanks Peter and Steve
When the time comes I will get one of these batteries, I remember that the starter would literally groan when the piston came onto compression, and then she would thunder into life (usually) a truly glorious sound. (thanks to the 2-1 exhaust) I can't remember any back fires tho'.
This is still the best duke site, keep up the good work guys!!
Barry
When the time comes I will get one of these batteries, I remember that the starter would literally groan when the piston came onto compression, and then she would thunder into life (usually) a truly glorious sound. (thanks to the 2-1 exhaust) I can't remember any back fires tho'.
This is still the best duke site, keep up the good work guys!!
Barry
gday,
I know its acouple of years since last message so I presume you still have the same problem. Me too. Ive lost count how many starter clutches Ive been through.
The clutch is simply not up to the job of turning over the motor with a starter motor half the size of my old darmah to drive it. I have had my starter motor done up and considering getting a four brush one built. Expensive but may provide the solution.
I have also had my cam timing (advanced I seem to remember, several years ago now) not ignition timing! to take load off the starter clutch as much as possible.
Plus I had the howdy sprag fitted, Now after it was in I was told it is not the one he builds because they dont fit the mille, but apparently it is out of a pontiac gearbox??? dont ask.
Anyway after the engine came back I unpacked it to find grit in the exhaust manifold, so being over cautious and checking inside the the cylinder for the mysterious grit, i upset the bevel timing. So there it has sat for a couple of years but I'm getting keen to get up and running.
So basically thats my story any help on the topic would be greatly appreciated.
If the suzuki 450, 500 have the same sprag then it just goes to show how much underdone Ducati engineered this one for a reasonably higher compression motor. Not forgetting this was the end of the line for Ducati before the bail out and so no improvements were forthcoming.
A pity seeing the rest is an awesome package.
Cheers
Scott
I know its acouple of years since last message so I presume you still have the same problem. Me too. Ive lost count how many starter clutches Ive been through.
The clutch is simply not up to the job of turning over the motor with a starter motor half the size of my old darmah to drive it. I have had my starter motor done up and considering getting a four brush one built. Expensive but may provide the solution.
I have also had my cam timing (advanced I seem to remember, several years ago now) not ignition timing! to take load off the starter clutch as much as possible.
Plus I had the howdy sprag fitted, Now after it was in I was told it is not the one he builds because they dont fit the mille, but apparently it is out of a pontiac gearbox??? dont ask.
Anyway after the engine came back I unpacked it to find grit in the exhaust manifold, so being over cautious and checking inside the the cylinder for the mysterious grit, i upset the bevel timing. So there it has sat for a couple of years but I'm getting keen to get up and running.
So basically thats my story any help on the topic would be greatly appreciated.
If the suzuki 450, 500 have the same sprag then it just goes to show how much underdone Ducati engineered this one for a reasonably higher compression motor. Not forgetting this was the end of the line for Ducati before the bail out and so no improvements were forthcoming.
A pity seeing the rest is an awesome package.
Cheers
Scott