Dead spot on Aprilia Leonardo starter motor Open Mutual — Company Blog

7 Май 2015 | Author: | Комментарии к записи Dead spot on Aprilia Leonardo starter motor Open Mutual — Company Blog отключены
Aprilia Leonardo 150

Dead spot on Aprilia starter motor

Another problem but I found out how to prove and discovered a very useful fix; The problem is that I to start the bike but just the click of the starter relay.

The answer to what I eventually was that the brushes in the starter had worn down to the last bit (on 43,000 kms). Minor in the commutator meant that the did not touch at one point. It had a “…

I discovered a get-you-home fix; on the ignition and push the starter then bounce hard up and on the seat (like you are testing the This rotates the starter around a little to step the … spot if it is a … and it may start – it did for me.

If that your problem then get to a or home in one go because what it is probably that your bushes are down to the last bit of and this will fail to again and the bouncing on the seat may not work.

As I mentioned I accidentally discovered the fix but in proving what was actually I also worked out a test as it could be one of 4 different things,

the contacts not working

no 12VDC +ve in


problem with starter

When you push the ignition then you should hear a click of the relay every you push in the switch. The relay is under the right hand of the seat and the contacts are visible an air vent just above the hand inspection opening. are two large lugs.

If you don’t this click then you a problem with the relay from the starter switch on the to the relay. You’ll have to this out with a multimeter if you are on the road and don’t have a then I would,

Check fuses are OK

check connections to relay and to starter look ok (no corrosion)

check switch making contact (if you can you try to prove by shorting the switch with a wire)

If the relay is a click and if you don’t have a you can test (1) and (4) by shorting the contacts of the with a bit of wire. Don’t to frame – just the contacts. One side is always 12V +ve and the connects through the starter to the engine earth.

With the OFF if you try and short the relay contacts and do NOT spark then the starter (or Earth or +ve supply) probably has a If they DO spark then the probably has a problem. Take with shorting this

If you do have a multimeter then is very easy. You should see 12 on one side of the relay all the time and you push the starter switch it should appear on the other If it does not then the relay is faulty.

If you do see the relay working the 12 volt supply goes to the motor via the heavy cable through the motor to the earth). the ignition off then if you measure the from the battery -ve/Earth to the starter relay lug that to the starter motor (not the side of the relay as that is live !) then you should see than an ohm e.g. only an ohm (0.5 Ω) – a near short as the starter is about 500 watts so at 12 Volts means about 0.3 ohms.

If you see a high reading (more an ohm) or an open circuit check that the case of the motor is low resistance (it should be at and then check that the lug starter motor is low resistance. The case will be corroded a bit so sure you are touching actual

If your finding is that the motor has a high resistance it then it is probably the brushes. The motor is easy to remove it will clash with the so not much wiggle room. The motor is also easy to apart and if it is a worn brush this is obvious.

You may be able to get a few more starts by the brush housing a bit but the brush is what will stop you in the If you do bend the housing to gain starts then you can test the on the bench by checking the resistance low between the case and terminal lug you slowly rotate the motor by one whole revolution. It should low ohms at every point.

If it is an Mitsui starter motor I don’t believe that you can get brushes assembly though an electrician may know of an equivalent part. AFAIKS the starter is the same for all  Leonardo 125 and 150 for all years (96-04) and for some models that use the Rotax 120/154 (120S-154S) engine

Scarabeo 125/150/200 from and also the BMW C1 125/200 from ). The OEM Aprilia starter motors are expensive – but there are cheaper “Economical” or equivalent that are made that are a 1/4 of the new. Unless you know the of a second hand bike can actually see the bushes to see how much is on them I wouldn’t buy a second starter motor.

Aprilia Leonardo 150
Aprilia Leonardo 150
Aprilia Leonardo 150
Aprilia Leonardo 150

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