BenB
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| posted on 16/11/11 at 08:36 AM |
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ZX9R alternator
Does anyone know how many amps this puts out?
Its slightly OT but kind of BEC related 
I've got the Denso alternator and I've searched for all the part numbers on it and nothing.
I'm guessing 25 amps at least as it's not tiny...
but does anyone know for sure?
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MakeEverything
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| posted on 16/11/11 at 08:52 AM |
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25A is tiny! Most spit out up to around 75A with the high power ones capable of over 100 iirc.
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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russbost
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| posted on 16/11/11 at 09:02 AM |
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quote:
Originally posted by MakeEverything
25A is tiny! Most spit out up to around 75A with the high power ones capable of over 100 iirc.
Ehhh!!!! Never seen a bike alternator putting out that sort of power, I'm going from memory but almost certain the old ZX10 (which is going to
be similar to the ZX9R) was 29 amps. It will certainly be in that sort of area, ie less than 30 more than 20. HTH
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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MakeEverything
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| posted on 16/11/11 at 09:20 AM |
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quote:
Originally posted by russbost
quote:
Originally posted by MakeEverything
25A is tiny! Most spit out up to around 75A with the high power ones capable of over 100 iirc.
Ehhh!!!! Never seen a bike alternator putting out that sort of power, I'm going from memory but almost certain the old ZX10 (which is going to
be similar to the ZX9R) was 29 amps. It will certainly be in that sort of area, ie less than 30 more than 20. HTH
Ive never seen an alternator on a bike, only generators inside the engine covers. I'm assuming the Denso alternator is a car unit?
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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BobM
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| posted on 16/11/11 at 09:43 AM |
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2006-7 ZX10R is 31A according to Kawasaki manual so probably slightly less than that for a 9.
Not very Locost but very BEC
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Hector.Brocklebank
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| posted on 16/11/11 at 09:45 AM |
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quote:
Originally posted by MakeEverything
Ive never seen an alternator on a bike, only generators inside the engine covers. I'm assuming the Denso alternator is a car unit?
Eh that might be a No !! some bikes, and in my past experience its always been Kawasaki !!! that has used a alternator that looks like it was raided
from their heavy engineering division.... see pic that is a ZX9 alternator
0BLHoiPR(mw~~_35.JPG)
As far as i can remember it might be possible to have your original unit (or buy a spare) rewound to produce more and it being in a "car"
style configuration it might be easier to find a specialist who rewinds alternators to take the job on to provide you with a higher output, or if your
feeling brave you could try a rewind yourself.
[Edited on 16/11/2011 by Hector.Brocklebank]
Some people can never handle the truth and always try to shoot the messenger instead of taking an honest look in the mirror (its always easier to
blame another than to face reality), but secretly they wish they could grow a pair and be the messenger !!!
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BenB
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| posted on 16/11/11 at 09:54 PM |
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Cool! Thanks for the info. 29A is fine for me It's true it's not a lightweight unit! I haven't stuck it on the scales but
it's a good 4kg I reckon!
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matt_gsxr
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| posted on 16/11/11 at 10:23 PM |
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Not sure of the zx9r, but the carbed gsxr1100wp has an output of about 25amps. Later gsf1200 have slightly higher power 33Amp. These are both of the
Denso design similar to that which you describe and pictured by 'hector'.
I rewired my alternator. Removing the internal regulator circuit (that limits the current to the spiny coil) and using one of those newer Mosfet
rectifier/regulator units (FH014. I couldn't bench test the performance of the modification, but I haven't had the same charging problems
that I had before (previously with lights on and EFI running I would flatten the battery after a long run). I made another few modifications (some
LED lights, HID headlights [yes, I know...]).
Matt
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matt_gsxr
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| posted on 16/11/11 at 10:23 PM |
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Not sure of the zx9r, but the carbed gsxr1100wp has an output of about 25amps. Later gsf1200 have slightly higher power 33Amp. These are both of the
Denso design similar to that which you describe and pictured by 'hector'.
I rewired my alternator. Removing the internal regulator circuit (that limits the current to the spiny coil) and using one of those newer Mosfet
rectifier/regulator units (FH014. I couldn't bench test the performance of the modification, but I haven't had the same charging problems
that I had before (previously with lights on and EFI running I would flatten the battery after a long run). I made another few modifications (some
LED lights, HID headlights [yes, I know...]).
Matt
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