Shop to service alternator in Los Angeles? - MVAgusta.net
 
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post #1 of 7 (permalink) Old 05-19-2017, 03:11 AM Thread Starter
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Shop to service alternator in Los Angeles?

Anyone know of an automotive electric shop in Los Angeles that would be game to service the alternator out of a Brutale 750? Based on other posts, it seems like a lot of shops are sissies about working on bike alternators or the MV one in particular because the regulator is built-in.

My last battery got worn out far too quickly and I'm pretty sure it's because my bike is pushing 15 V and overcharging it. I checked with Yuasa hoping the spec in the MV manual was overly cautious, but Yuasa said 15 V would indeed ruin the battery.

Going to take a crack at removing the alternator this weekend, would love to find somewhere local to take it for a check/rebuild if needed

thanks

chris chandler
2004 Brutale S
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post #2 of 7 (permalink) Old 05-19-2017, 01:30 PM
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Chris;
Call Peerless Auto Parts 310-856-4810 and ask them

one of the last REAL auto parts stores

most regulators are built in



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post #3 of 7 (permalink) Old 05-19-2017, 11:11 PM
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Chris,
I recall 'Gremmin' having posted ND part numbers for (one or all of) alternator, rectifier, and regulator here in this forum, search and ye shall find.

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MY04 Brutale 750S
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post #4 of 7 (permalink) Old 05-21-2017, 09:41 PM
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Chris;
Read the 7 page explanation of how the charging system works in the service manual

My Brutale 910R idles at 14.79V, above idle 14.81V ...... battery lasted 8 years, standard Yuasa


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post #5 of 7 (permalink) Old 05-22-2017, 05:08 PM Thread Starter
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Quote:
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Chris;
Read the 7 page explanation of how the charging system works in the service manual

My Brutale 910R idles at 14.79V, above idle 14.81V ...... battery lasted 8 years, standard Yuasa

Oh man, I'd love to find out that I'm chasing ghosts and can just get a new battery. Although I'm nearly at the point of having my alternator removed, but those trials belong in a different thread

My Yuasa battery already needs to be replaced after only a couple of years. After a few days of riding, it struggles to start and voltage drops as low as 9V during start (even fresh off the charger, the start load will drop it to 10.5V but it'll still start confidently). What I'm trying to sort out is whether my charging system is overcharging and prematurely wearing the battery. I don't want to have to buy new battery in another couple of years and constantly wonder whether my bike will start. I figured the best way to be sure of that would be to have the alternator tested out on a bench.

After trickle charging my battery over night, it reads 12.6V. When the engine is at temp, from idle up to 2,000rpm I've had voltage readings of:
first time starting after reinstalling battery (just starting, no ride) - 15V
next day, first ride of 8 miles/6 on the highway, outside temp 60ºF - 14.69V
bike parked for 9.5 hours, outside temp 62ºF - 14.98V at idle to 2,000rpm. At 3,000-4,000 rpm, voltage fluctuates semi-rapidly anywhere in the range of 14.3-14.8

Workshop manual says 12.6-14.3V @ 2,000rpm

Also have a Microtec, but if I'm understanding posts on another thread, the Microtec bypasses the "sense" connection so the ECU shouldn't be a factor?

chris chandler
2004 Brutale S
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post #6 of 7 (permalink) Old 05-22-2017, 06:26 PM
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Chris;
To me it seems a connection issue.....

disconnect the battery, clean the terminals apply Dielectric grease
clean both ends of the wire from the alternator, grease
inspect and clean the charging system fuse, grease
inspect and clean both ends of the wire from the battery to the solenoid, grease
then....
go to AutoZone they'll test the charging system and battery
come to my house, I'll test it
Best go to Peerless Auto Parts and John will use the latest electronic test equipment ..... it's free

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post #7 of 7 (permalink) Old 05-22-2017, 08:03 PM
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Quote:
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inspect and clean the charging system fuse,
this was the source of my bike intermittently unwilling to start, battery charging fuse was bad/corroded.

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MY04 Brutale 750S
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