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integradeltona
Joined: 31 Mar 2018 Posts: 6 Location: Falset, CATALUNYA
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Posted: Tue Aug 21, 2018 9:33 am Post subject: new owner of bimota sb6, alternator problems... |
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hello, I'm a new owner of a bimota sb6 first series, a great bike that accompanies a ducati 998 and an mv agusta f4 750.
Now I have problems with the alternator, I have read that there is a piece that when it breaks does not transmit the rotation of the engine to the alternator, is what happens to me, in my bike this piece is already modified with an aluminum ring, I have seen in some post that makes this modification, but still not transmit the rotation.
I don't see how I can remove this piece to see why it doesn't turn or replace it with ref 22740-46E02.
I would be grateful for any help, but I don't want to have to take the engine out.....
big thanks
my bimota sb6 is the one from this video known to everyone: https://youtu.be/ICDyQE5bML0 |
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Jonny B Bad
Joined: 05 Dec 2009 Posts: 555 Location: NE London
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Posted: Tue Aug 21, 2018 9:49 am Post subject: SB6 Alternator coupler |
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You need to lower the engine, by pivotting it on the front engine bolts and then you can get the long screws which hold the starter clutch cover out. You then lift the starter clutch assembly out of its housing and remove the coupler from the end of the shaft with a bearing puller. You will need a hydraulic press to put the new bearing and coupler on.
Good luck! _________________ What, Jonny's gone! |
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brian
Joined: 22 Aug 2011 Posts: 3770 Location: Australia
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Posted: Tue Aug 21, 2018 10:29 am Post subject: |
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it's also recommended that the rubber flap covering the alternator be removed and left off as it has a tendancy to overheat the alternator. _________________ '99 DB4 #104, '96 SB6 #1165, '94 DB2 J #652, '99 DB4 #088, '08 VTX1800, '93 ZXR750R M1, '95 ZXR750, '95 ZXR750 Race Bike, '94 CBR400rr NC29 Race Bike, '94 CB250, '49 BSA C10 250, '61 BSA A10 650, '89 ZXR750, '91 Ducati 851 |
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brian
Joined: 22 Aug 2011 Posts: 3770 Location: Australia
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Posted: Tue Aug 21, 2018 10:29 am Post subject: |
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Welcome to the forum by the way _________________ '99 DB4 #104, '96 SB6 #1165, '94 DB2 J #652, '99 DB4 #088, '08 VTX1800, '93 ZXR750R M1, '95 ZXR750, '95 ZXR750 Race Bike, '94 CBR400rr NC29 Race Bike, '94 CB250, '49 BSA C10 250, '61 BSA A10 650, '89 ZXR750, '91 Ducati 851 |
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integradeltona
Joined: 31 Mar 2018 Posts: 6 Location: Falset, CATALUNYA
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Posted: Tue Aug 21, 2018 11:11 am Post subject: |
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many thanks .
the rubber cover was no longer
In a suzuki gsxr forum i have seen that they make a modification replacing the rubber with an aluminum or other soft metal cap, mine has this modification but now it is not effective, someone has made this modification? |
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brian
Joined: 22 Aug 2011 Posts: 3770 Location: Australia
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Posted: Tue Aug 21, 2018 1:24 pm Post subject: |
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No I haven't heard of that one. I've just left mine uncovered. My SB6 doesn't get ridden in bad conditions very often _________________ '99 DB4 #104, '96 SB6 #1165, '94 DB2 J #652, '99 DB4 #088, '08 VTX1800, '93 ZXR750R M1, '95 ZXR750, '95 ZXR750 Race Bike, '94 CBR400rr NC29 Race Bike, '94 CB250, '49 BSA C10 250, '61 BSA A10 650, '89 ZXR750, '91 Ducati 851 |
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integradeltona
Joined: 31 Mar 2018 Posts: 6 Location: Falset, CATALUNYA
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Posted: Tue Aug 21, 2018 6:04 pm Post subject: |
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_________________ DUCATI 998, MV AGUSTA F4 750 1+1 |
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Evilchicken0
Joined: 12 May 2010 Posts: 2996 Location: London
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integradeltona
Joined: 31 Mar 2018 Posts: 6 Location: Falset, CATALUNYA
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Posted: Wed Aug 22, 2018 9:40 am Post subject: |
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This modification is being made by the owners of suzuki gsxr1100w due to the continuous breakage of the piece, it is not a bimota or suzuki modification.
And it looks like it's a modification that works. _________________ DUCATI 998, MV AGUSTA F4 750 1+1 |
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Jonny B Bad
Joined: 05 Dec 2009 Posts: 555 Location: NE London
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Posted: Wed Aug 22, 2018 10:02 am Post subject: SB6 |
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I think Suzuki started with a solid metal part, but when it failed it led to catastrophic damage to the motor. Which is why they went to a hard rubber bush, that will fail if abused. By abuse, we mean trying to start it with an undercharged battery. I replaced a coupler some years ago and with a lithium battery have not had a problem since. _________________ What, Jonny's gone! |
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integradeltona
Joined: 31 Mar 2018 Posts: 6 Location: Falset, CATALUNYA
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Posted: Wed Aug 22, 2018 10:15 am Post subject: Re: SB6 |
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Jonny B Bad wrote: |
I think Suzuki started with a solid metal part, but when it failed it led to catastrophic damage to the motor. Which is why they went to a hard rubber bush, that will fail if abused. By abuse, we mean trying to start it with an undercharged battery. I replaced a coupler some years ago and with a lithium battery have not had a problem since. |
I don't see the relationship between starting the engine with low battery and alternator coupler failure, the alternator can be blocked due to power demand?
In the case of this modification the bushing is glued with a sealant so it will also break if there is a problem, maybe it is my case. _________________ DUCATI 998, MV AGUSTA F4 750 1+1 |
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Jonny B Bad
Joined: 05 Dec 2009 Posts: 555 Location: NE London
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Posted: Wed Aug 22, 2018 10:46 am Post subject: SB6R |
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I guess the metal coupler broke up and dropped metallic bits in the motor, as opposed to relatively harmless rubber bits. _________________ What, Jonny's gone! |
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Evilchicken0
Joined: 12 May 2010 Posts: 2996 Location: London
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Posted: Wed Aug 22, 2018 12:16 pm Post subject: Re: SB6 |
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integradeltona wrote: |
Jonny B Bad wrote: |
I think Suzuki started with a solid metal part, but when it failed it led to catastrophic damage to the motor. Which is why they went to a hard rubber bush, that will fail if abused. By abuse, we mean trying to start it with an undercharged battery. I replaced a coupler some years ago and with a lithium battery have not had a problem since. |
I don't see the relationship between starting the engine with low battery and alternator coupler failure, the alternator can be blocked due to power demand?
In the case of this modification the bushing is glued with a sealant so it will also break if there is a problem, maybe it is my case. |
As I understand it:
The starter motor and alternator share the same shaft so when you crank the motor you crank the alternator, which in time breaks the rubber coupler which. Suzuki revised the bearing but it's a remove and replace operation. Look at the Suzuki Workshop Manual part Engine 3-48. If you don't have the tools or you're unsure then take it to a workshop. _________________ Don't read everything you believe |
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integradeltona
Joined: 31 Mar 2018 Posts: 6 Location: Falset, CATALUNYA
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Posted: Thu Aug 23, 2018 10:33 am Post subject: Re: SB6 |
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Evilchicken0 wrote: |
integradeltona wrote: |
Jonny B Bad wrote: |
I think Suzuki started with a solid metal part, but when it failed it led to catastrophic damage to the motor. Which is why they went to a hard rubber bush, that will fail if abused. By abuse, we mean trying to start it with an undercharged battery. I replaced a coupler some years ago and with a lithium battery have not had a problem since. |
I don't see the relationship between starting the engine with low battery and alternator coupler failure, the alternator can be blocked due to power demand?
In the case of this modification the bushing is glued with a sealant so it will also break if there is a problem, maybe it is my case. |
As I understand it:
The starter motor and alternator share the same shaft so when you crank the motor you crank the alternator, which in time breaks the rubber coupler which. Suzuki revised the bearing but it's a remove and replace operation. Look at the Suzuki Workshop Manual part Engine 3-48. If you don't have the tools or you're unsure then take it to a workshop. |
ok, first I will try to fix the coupling again if it doesn't work i will replace the coupling with the new suzuki reference.
I have the suzuki and bimota workshop manual as well as tools to be able to do the repair
many thanks _________________ DUCATI 998, MV AGUSTA F4 750 1+1 |
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Bob Taylor
Joined: 16 May 2017 Posts: 59 Location: Scotland
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Posted: Sun Aug 26, 2018 1:49 pm Post subject: |
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I had the same problem. Managed to change the Cush drive without takin out the engine. Was quick but a lot quicker than dropping the engine. |
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