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MT-01 starter motor...
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I have an original 2005 SP1 MT-01 since new with over 100K on it...

To date I have had to replace 3 x starter motors & at nearly €700 it's becoming an expensive habit...

It's a sealed unit & the same recurring issue every time...the magnets on the inner housing detach themselves & it's kaput!

Anyone else had these issues or knows where I might get my collection of MT-01 starter motors refurbished?
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Re: MT-01 starter motor...
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ref YS-31N Starter/Yamaha/Motorcycle
Yamaha 4WM-81890-00-00 4WM-81890-01-00
Description: Starter
Supplier: EMS
OEM(s): Mitsuba
Starter Family: Mitsuba SM13
Voltage: 12 Volts
Rotation: CW
Teeth/Splines: 22 Teeth/Splines
Approximate Weight: 3.6 lbs / 1.6 kg

$141.95
YAMAHA Powersport MOTORCYCLE XV1600A Road Star 1602cc 1999-2003
MOTORCYCLE XV1600AS Road Star MM Ltd 1602cc 2000
MOTORCYCLE XVZ1600AT Road Star Silverado 1602cc 1999-2003

Try this one, a lot cheaper.
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Re: MT-01 starter motor...
« Reply #2 on: »
You the man, much appreciated  ;) 8)
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Re: MT-01 starter motor...
« Reply #3 on: »
Quote from: DLMA23 on May 16, 2018, 05:24:18 pm

It's a sealed unit & the same recurring issue every time...the magnets on the inner housing detach themselves & it's kaput!

I don't know about yours, but mine is definetely not sealed. Detached magnets doesn't mean that it's kaput. Many times (not always) they can be glued back on. I did it on mine (and replaced the brushes) and works like a charm.

Quote from: DLMA23 on May 16, 2018, 05:24:18 pm
Anyone else had these issues or knows where I might get my collection of MT-01 starter motors refurbished?

Bring them on, I'll fix them  ;D
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Re: MT-01 starter motor...
« Reply #4 on: »
Has anyone tried the roadstar starters my starter has started grumbling today along with clutch slipping after remap on the Dyno
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Re: MT-01 starter motor...
« Reply #5 on: »
Hi, Mines a 2009 MT01 SP. Can anyone tell me what are the tell tale signs when the starter is on its way out. Mines a lazy turn over but always has been. Thanks  Steve
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Re: MT-01 starter motor...
« Reply #6 on: »
Quote from: Gary on May 23, 2019, 03:06:10 pm
Has anyone tried the roadstar starters my starter has started grumbling today along with clutch slipping after remap on the Dyno

I know some guys who did. No problem at all.
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Re: MT-01 starter motor...
« Reply #7 on: »
Quote from: Jota on May 23, 2019, 10:40:44 pm
Hi, Mines a 2009 MT01 SP. Can anyone tell me what are the tell tale signs when the starter is on its way out. Mines a lazy turn over but always has been. Thanks  Steve

Lazyness is indeed a sign, but not 100% accurate. The best way to be sure : take it apart when changing your oil. It takes 5 minutes to get the motor out.
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Re: MT-01 starter motor...
« Reply #8 on: »
Re this whole issue. Mine is at 72000kms and is a stage 4 and 1800cc. It still runs the original starter.
It also runs a Li battery which spins a little easier.
A standard ecu MT turns over about 1 1/2 times to start and a stage 2 or 3 about 1 turn.
If your bike has some issue that means you have to keep turning it over then you have a situation of declining voltage and increased amp draw. Would this overheat the starter causing the magnet problem?
As many of you are in the UK and have longish periods of not riding, could this be a clue.
Maybe always charge the battery before even trying to start it. Dont spend time trying to get it to turn over and then putting charger on, you have already given battery and starter a hard time.
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Re: MT-01 starter motor...
« Reply #9 on: »
Quote from: omeo-mt01 on June 10, 2019, 01:42:29 am
A standard ecu MT turns over about 1 1/2 times to start and a stage 2 or 3 about 1 turn.

Where did you get that information ? Just curious ...

FYI : I have a stage 2 ECU and have had magnet failure (2 of them loose). The OEM really used a minimal quantity of glue (just one small drop per magnet).
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Re: MT-01 starter motor...
« Reply #10 on: »
Quote from: Tartofraiz on June 12, 2019, 09:36:36 am
Quote from: omeo-mt01 on June 10, 2019, 01:42:29 am
A standard ecu MT turns over about 1 1/2 times to start and a stage 2 or 3 about 1 turn.

Where did you get that information ? Just curious ...

FYI : I have a stage 2 ECU and have had magnet failure (2 of them loose). The OEM really used a minimal quantity of glue (just one small drop per magnet).

Hi, I may be wrong in the exact number of turns but we have talked about this before. Standard ecu the bike takes about 1/1/2 to 2 turns to start.
Either stage 2 or 3 ecu gives a quicker start routine, a single turn (sort of). How do I know?, experience.
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Re: MT-01 starter motor...
« Reply #11 on: »
Quote from: Tartofraiz on June 12, 2019, 09:36:36 am
Quote from: omeo-mt01 on June 10, 2019, 01:42:29 am
A standard ecu MT turns over about 1 1/2 times to start and a stage 2 or 3 about 1 turn.

Where did you get that information ? Just curious ...

FYI : I have a stage 2 ECU and have had magnet failure (2 of them loose). The OEM really used a minimal quantity of glue (just one small drop per magnet).

And separately, the magnet thing is likely as you suggest, a bad bunch. But in trying to point out that excess use could also cause heat problems I mentioned the turnover rate thingo. Prob doesnt happen.
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  3. MT-01 starter motor...