not charging when out for a ride - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
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post #1 of 17 (permalink) Old 05-07-2015, 01:30 PM Thread Starter
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not charging when out for a ride

OK I did all the tests in the stickys for R/R and stator. Supposedly everything is good. I did get the stator from the guy mentioned on here. I think his name was pete. Anyway he sent me my stator back and I put it in the bike. The R/R was new from ebay. I see the battery in the bike is charging just fine in my garage. Oh and it's an enclosed battery. I heat it up and it's charging. Or so the meter says 15.4 I leave it over nite and it's fine. The battery isn't loosen any charge.
I go for a ride and I come home and the battery is dead. (well down to 12.1 so wont start anything again). I just don't know what can be wrong...everything seems to work until I ride it. UGH!! Its got to be something with it heating up right?? Where should I check? Any ideas guys? I know it's an old bike (87) but hoping it's still got some miles left in her. Thanks.

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1986 750 Vulcan
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Re-did the engine
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post #2 of 17 (permalink) Old 05-07-2015, 04:32 PM
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You should check your charging voltage after you "heat up" your bike...
And do the stator check. It's not unheard of for the stator to seem to work fine when the engine is cold, only to fail when it heats up.

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post #3 of 17 (permalink) Old 05-07-2015, 06:55 PM
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Putting 15.4 volts into the battery will cook it. The battery might be shot now. Might also have a defective r/r.

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marbled
TOC upgrade on ACCT
Air/fuel mixture set to 2 1/2 out
rectifier relocated
splines lubed
iridiums
decals removed
upgraded mirrors
Pic up coil mod done
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Upgraded Mosfet rectifier
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post #4 of 17 (permalink) Old 05-07-2015, 08:39 PM
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Yes check r&r

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post #5 of 17 (permalink) Old 05-07-2015, 10:37 PM
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Look into the MOSFET variety. Standard replacement R/Rs for our bikes are pretty bad overall.

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


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post #6 of 17 (permalink) Old 05-08-2015, 07:46 AM Thread Starter
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ok will try to do these today- hurt my arm and having to go see the doctor it may be broken or just strained real bad...bike has trouble and is old-I am following suite hahaha

BeeSea
1986 750 Vulcan
Coastered
Relocate R/R to side cover
Re-did the engine
from the case up.(And it runs)
YOU CAN TOO!
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post #7 of 17 (permalink) Old 05-08-2015, 09:19 AM Thread Starter
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Haven't been to doctor yet for arm but did get a chance to watch videos http://www.roadstercycle.com/Roadste...m%20Videos.htm to see if I was correctly testing the R/R and I wasn't. Go figure...and when I did test it correctly. Yup there is no readings on the R/R will be getting a new one Mossfets I guess is the way to go any cheaper ones out there? than roadstercycle? Or do I just need to anty up? Not sure about all that soddering stuff...

BeeSea
1986 750 Vulcan
Coastered
Relocate R/R to side cover
Re-did the engine
from the case up.(And it runs)
YOU CAN TOO!
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post #8 of 17 (permalink) Old 05-08-2015, 10:35 AM
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Quote:
Originally Posted by BeeSea View Post
Haven't been to doctor yet for arm but did get a chance to watch videos http://www.roadstercycle.com/Roadste...m%20Videos.htm to see if I was correctly testing the R/R and I wasn't. Go figure...and when I did test it correctly. Yup there is no readings on the R/R will be getting a new one Mossfets I guess is the way to go any cheaper ones out there? than roadstercycle? Or do I just need to anty up? Not sure about all that soddering stuff...
Anty up, you won't regret it. Good product and service. You can get away with good waterproof crimp connectors if need be. Solder is better.

JM2001

" Loud Pipes Risk Rights "

2001 Vulcan 750
marbled
TOC upgrade on ACCT
Air/fuel mixture set to 2 1/2 out
rectifier relocated
splines lubed
iridiums
decals removed
upgraded mirrors
Pic up coil mod done
degoated
All LED lighting
Upgraded Mosfet rectifier
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post #9 of 17 (permalink) Old 05-08-2015, 10:46 AM Thread Starter
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OK don't understand the terms for the parts he is selling but he has a Universal FH020AA Kit with Maxifuse or 30 amp Circuit breaker. Which do I need the maxifuse or the circuit breaker-whats the difference?? I really didn't see on his website the difference or maybe I just didn't see where he said the diff.

BeeSea
1986 750 Vulcan
Coastered
Relocate R/R to side cover
Re-did the engine
from the case up.(And it runs)
YOU CAN TOO!
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post #10 of 17 (permalink) Old 05-08-2015, 10:51 AM
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Yep, ante up, I've never seen new MOSFETS any cheaper, unless you find one on a parts bike.

Mine has been very good, even better after bypassing a junction box problem. Solid 14.5v at cold idle or hot with high rpm.

I'm fairly certain the MOSFET won't fit where the stock one is mounted, but never removed the stock r/r to find out. I made a simple aluminum plate (from a frying pan) to mount it under the left side cover, just two bends and six holes. Four holes to mount the r/r, two to bolt the plate to the battery box bolts. Tanner did a how-to post on his.

My r/r covers the fuse box, but I always have a 10mm socket with me in case I blow a fuse. Just two bolts and the r/r drops down. Some wingnuts or knob screws would be great there, just haven't had a need to change it.

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