New startermotor for 900ss. Need more power? - Ducati.ms - The Ultimate Ducati Forum
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post #1 of 11 (permalink) Old Yesterday, 7:56 am Thread Starter
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New startermotor for 900ss. Need more power?

Hey guys.
My startermotor has given up on me after trying to start my bike, after having high compression pistons mounted.
Battery is new, motobatt 16 au, with 230 cca.

Do i need a extra powerfull startermotor or is original strong enough?
At electrexworld.uk i see one for a fair price.

Do you guys with highcomps had similar issues?
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post #2 of 11 (permalink) Old Yesterday, 10:50 am
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I thought my starter had gone too but at a suggestion from a forum member I carefully removed the end cap to see that one of the commutator brushes wire had come loose. A bit of clean up, quick drop of solder and was good as new. Now I have a new starter sitting on my shelf for the day when it finally gives up for good.

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post #3 of 11 (permalink) Old Yesterday, 11:08 am
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I have been Running lots of race compression (higher than pump gas capable) motors 2-valve and 4-valve both at the dealership as well as on my own for the last 10 years I have never changed a starter for performance reasons. Stock starters are fine if everything else is fine. If your starter is not do as rockAz did and inspect brushes and seals for problems but if the starter worked before you did motor work it is unlikely due to the starter motor.
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post #4 of 11 (permalink) Old Yesterday, 11:44 am Thread Starter
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Thanks guys i was gonna inspect it anyway yes.
Be4 the high comps the engine cranked only just hard enough. But never wax a problem, i accused the old battery.

Now with the high comps snd new battery its when the problems occur. My gues, the starter was allready pretty much at the end of its life, and the high comps gave the last deadly blow.

Ill inspect now first, and who knows i can repair it. Atleast i know that oem or equivalent is fine. Thanks! 👍
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post #5 of 11 (permalink) Old Yesterday, 12:00 pm
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Maybe installing a high-cap starter wire kit will help?

I don't run high comp pistons but I made a 25mm˛ starter kit with Klauke lugs (or better; had it made by a tech guy at work) and that made a big difference in starting the bike.

Now I got instant response from the starter when I push the start button.

Not sure if that enhances the lifespan of a startermotor but if it doesn't work, it doesn't hurt I suppose...
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post #6 of 11 (permalink) Old Yesterday, 12:17 pm Thread Starter
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Belgianduke you are right. I will install bigger cables later on. But that wasnt the problem today. Even with serious starter cables, directly to the startter motor it still didnt crank hard enough.

Have the cap off now. I brush is totally gone and some debree in there.
Think ill buy a complete new one so i can ride, and next winter check if this old one is still salvagable.
👍
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post #7 of 11 (permalink) Old Yesterday, 1:25 pm
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I actually have a used starter motor I bought for my Streetfighter, but I sold the bike.

PN 270.4.010.3A if it fits your bike

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post #8 of 11 (permalink) Old Yesterday, 6:04 pm
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Quote:
Originally Posted by DonDuke View Post
.....and next winter check if this old one is still salvagable.
Just a heads-up DonDuke. 067050815 is the part number for the OEM replacement starter brush kit.
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post #9 of 11 (permalink) Old Yesterday, 10:47 pm
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Quote:
Originally Posted by stoshmonster View Post
Just a heads-up DonDuke. 067050815 is the part number for the OEM replacement starter brush kit.
and it's only $45.50 from Ducati Omaha...

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post #10 of 11 (permalink) Old Today, 2:26 am
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These guys make nice stuff for re-cabling using million strand wire

https://motolectric.com/makes/ducati.html

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