hello. my bike just started to have a problem with the starter. i start up the bike and the stater it spins but doesn't turn the engine. second try it spin and turn engine little and spin again. and the starter was new. i replace it last year from Rick's Motorsports Starter Motor. is anyone know have a problem like this and know how to fix it???
thanks
Starter problem
- ducinthebay
- paso grand pooh-bah
- Posts: 1323
- Joined: Sat Sep 03, 2005 12:00 am
- model: 750 Sport
- year: 1990
- Location: SF Bay Area
Re: Starter problem
Sounds like a starter sprag. Otherwise known as a clutch. Its a one way clutch that connects the starter power to the crank. There is a fine spring like one on a seal all around it. If it gets stretched, it will be come intermittent. Just did it on an ST2.
Cheers, Phil
Cheers, Phil
Duc in the Bay
1990 750 Sport x2-Rosso Blanko (900ss copy) & Nuovo Nudo (Scrambler project)
1991 907 -mostly stock
2002 ST4s - Lots of mods.
1990 750 Sport x2-Rosso Blanko (900ss copy) & Nuovo Nudo (Scrambler project)
1991 907 -mostly stock
2002 ST4s - Lots of mods.
-
- Posts: 39
- Joined: Sat Jan 15, 2011 9:09 am
- model: 907 I.E.
- year: 1992
- Location: wanganui NEW ZEALAND
Re: Starter problem
If you can get the sprag bearing out and inspect the inner and outer surfaces of the bearing hubs
for any roughness/uneven surface if this has occurred then get it skimmed slightly(outer)
and use some emery cloth to dress the inner and fit a SKF
seal spring that best suits the bearing proper,don't worry to much if the rollers have slight damage
to them as I had one on mine and it has not caused any problems!Done 50,000 k's no worries.
for any roughness/uneven surface if this has occurred then get it skimmed slightly(outer)
and use some emery cloth to dress the inner and fit a SKF
seal spring that best suits the bearing proper,don't worry to much if the rollers have slight damage
to them as I had one on mine and it has not caused any problems!Done 50,000 k's no worries.
"keeping the shiney side up"
-
- Posts: 22
- Joined: Tue Dec 31, 2013 12:55 am
- model: 907 I.E.
- year: 1993
- Location: Pennsylvania USA
- Contact:
Re: Starter problem
thank for replying guys. is there a way to repair the starter sprag? i found one on ebay for 150 \
http://www.ebay.com/itm/331544858448?it ... 23&vxp=mtr
http://www.ebay.com/itm/331544858448?it ... 23&vxp=mtr
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- Posts: 295
- Joined: Tue Jul 24, 2012 8:54 am
- model: 907 I.E.
- year: 1992
- Location: Cairns, Queensland, Australia
Re: Starter problem
Hi Sean.
The spring is usually the culprit with the sprag, and can be replaced with one off an SKF Oil Seal. There is a few posts here that cover it all. A KTM Sprag (new) is also available that is a direct replacement, and is about half the price of a genuine Ducati (don't figure?) unit. Again, the posts here have all that info.
Have a look at posts:
http://forums.ducatipaso.org/viewtopic. ... ilit=sprag
and
http://forums.ducatipaso.org/viewtopic. ... ilit=sprag
That should keep you busy!
Cheers.
Nick.
The spring is usually the culprit with the sprag, and can be replaced with one off an SKF Oil Seal. There is a few posts here that cover it all. A KTM Sprag (new) is also available that is a direct replacement, and is about half the price of a genuine Ducati (don't figure?) unit. Again, the posts here have all that info.
Have a look at posts:
http://forums.ducatipaso.org/viewtopic. ... ilit=sprag
and
http://forums.ducatipaso.org/viewtopic. ... ilit=sprag
That should keep you busy!
Cheers.
Nick.
- ducinthebay
- paso grand pooh-bah
- Posts: 1323
- Joined: Sat Sep 03, 2005 12:00 am
- model: 750 Sport
- year: 1990
- Location: SF Bay Area
Re: Starter problem
Or just google Ducati starter sprag clutch. All basically the same in function. (KTM too)
Cheers, Phil
Cheers, Phil
Duc in the Bay
1990 750 Sport x2-Rosso Blanko (900ss copy) & Nuovo Nudo (Scrambler project)
1991 907 -mostly stock
2002 ST4s - Lots of mods.
1990 750 Sport x2-Rosso Blanko (900ss copy) & Nuovo Nudo (Scrambler project)
1991 907 -mostly stock
2002 ST4s - Lots of mods.
-
- Posts: 22
- Joined: Tue Dec 31, 2013 12:55 am
- model: 907 I.E.
- year: 1993
- Location: Pennsylvania USA
- Contact:
Re: Starter problem
hello guys. lately i been busy. just have time to open up and see what wrong with the starter sprag. i found out that rollers have some damage. few of the rollers is bent at the gap where the spring fit in and the new spring wont fit in so i have to use sand paper to sand most of the damage part down. so the spring can fit in the gap. since i got a new spring. the inner surface have some uneven surface. should i just use sand paper to smooth them out? please let me know thanks guys