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Joined: Oct 02, 2006 Posts: 2050 Location: New Britian, CT
Posted: Wed Mar 30, 2011 3:56 pm Post subject:
Personally, I thought he knew that he should just get it running at idle, and then do the test with lights on and lights off. It appears I erred in my judgement.
Joined: Mar 28, 2011 Posts: 35 Location: Belvidere NJ, USA
Posted: Wed Mar 30, 2011 4:04 pm Post subject:
MR.CHocko wrote:
Personally, I thought he knew that he should just get it running at idle, and then do the test with lights on and lights off. It appears I erred in my judgement.
Something i learned long ago, never assume anything. I have come across alot of riders who dont know much about mechanics or electrics, so it is easier to just explain right off the get go. I enjoy helping others out when it comes to things like this. I hated it when you'd ask a mechanic a question about something you didnt know much about and the only response they gave was "schedule an appointment to bring it in the shop." _________________ Cycle Madness Mototrcycle Repair
Belvidere NJ 07823
908.475.2332
Have: 1998 VTR1000F, 1993 CBR900RR, 1991 Honda Shadow, 1986 Yamaha SRX600, *1978 KZ400B, *1978 GS1000E, *2002 CBR954RR
Had: 1970 Kaw A1 250 Samurai, 1978 Yam SR500 x2, 1978 DT400, 1980 Xs650, 1981 Honda FT500 x2, 1980 Yam XT500, 1973 Bultaco 250 Persang,1073 Honda CB350T....and thats all I remember off the top of my head.
* denotes Project bikes
Joined: Oct 02, 2006 Posts: 2050 Location: New Britian, CT
Posted: Wed Mar 30, 2011 4:11 pm Post subject:
If I spent more time trying to help people with their bikes I wouldn't have any time to be selling my huge inventory of parts. I use to do that, but I came to the realization that you get taken advantage of very quickly. Here I will share my knowledge of Benlys, but I am very cautious to do that at a meet unless it involves judgeing.
Joined: Aug 31, 2010 Posts: 51 Location: Northern Virginia
Posted: Sat Apr 02, 2011 10:45 am Post subject:
SPRHK wrote:
I would fire the bike up, lights off, test battery at idle, slowly rev up to about 3000rpm, reading the meter. Then flip the head light on and do it again. I really dont think you need to rev it up to 4000-5000 RPM.
Finally got a break from work and family obligations and fired up the bikes today - '70 H1, '70 T500, and last but not least the '68 T500 Cobra: the one with slow battery drain. So here are the various voltage readings I took - real anxious to get some feedback from the board =
12.5v : Ignition on, charged battery 2+ weeks ago and bike sat two weeks not run
11.97v : Warmed-up and running steady @ 3000 rpm
11.94 v : Warmed-up idle @ 1500 rpm
11.75v : WITH LIGHTS ON while running steady @ 3000 rpm
11.6v : WITH FLASHERS ON while running steady @ 3000 rpm
12.15v : With bike now shut off; note the voltage slowly ticks up with bike off and after just a couple of minutes the voltage reads 12.3v...
Obviously there is a major drain via the lights and flashers. I do use those when I ride for safety. Any thoughts from the the electrical experts out there?
Joined: Mar 28, 2011 Posts: 35 Location: Belvidere NJ, USA
Posted: Sat Apr 02, 2011 11:48 am Post subject:
This telles me the battery is good, but the system isnt charging. You need to test the stator & the reg. rectifier. Normally, when it doesnt charge, it is a short in the stator windings, and if it is over charging, the reg/rect. is bad. HOWEVER, I have seen it be just the opposite before. not often but at least once or twice. you will need to look in the service manual and follow the test proceedures for your bike. Usually very simple to do. _________________ Cycle Madness Mototrcycle Repair
Belvidere NJ 07823
908.475.2332
Have: 1998 VTR1000F, 1993 CBR900RR, 1991 Honda Shadow, 1986 Yamaha SRX600, *1978 KZ400B, *1978 GS1000E, *2002 CBR954RR
Had: 1970 Kaw A1 250 Samurai, 1978 Yam SR500 x2, 1978 DT400, 1980 Xs650, 1981 Honda FT500 x2, 1980 Yam XT500, 1973 Bultaco 250 Persang,1073 Honda CB350T....and thats all I remember off the top of my head.
* denotes Project bikes
Joined: Aug 31, 2010 Posts: 51 Location: Northern Virginia
Posted: Sat Apr 02, 2011 12:33 pm Post subject:
* UPDATE *
Thanks guys but I believe I found the source of my battery drain problem. Long story short for you T500 owners: among the wire harness leading from the generator back towards the battery are many different colored wires including a yellow and black one. They are supposed to be hooked up to similarly colored wires coming from the rectifier. But in my case, they were reversed: the yellow wire from the generator was hooked to the black wire from the rectifier and the black wire from the generator was hooked to the yellow wire from the rectifier. I connected the wires to the correct colors and voila! Voltage Meter readings in the 13v to 14v range with the bike running - and with the lights and flashers on! THANKS AGAIN to all and I will keep testing after rides and post updates if necessary. Oh, and as I said - I am no electrical expert, but I know how to connect wires of the same color. I DID NOT do the wiring on this bike! Sorry to bug you all about this embarrasing situation but it has been a learning experience. Also, if anyone wants an EXCELLENT description of an electrical system on these old bikes, etc... take a look at an official Yamaha R5 Service manual... way better than what's in the Suzuki T500 service manual, Hanes Suzuki T500 manual, Clymer Suzuki T500 manual, etc...
Joined: Mar 28, 2011 Posts: 35 Location: Belvidere NJ, USA
Posted: Sat Apr 02, 2011 3:08 pm Post subject:
ericsattic wrote:
* UPDATE *
Thanks guys but I believe I found the source of my battery drain problem. Long story short for you T500 owners: among the wire harness leading from the generator back towards the battery are many different colored wires including a yellow and black one. They are supposed to be hooked up to similarly colored wires coming from the rectifier. But in my case, they were reversed: the yellow wire from the generator was hooked to the black wire from the rectifier and the black wire from the generator was hooked to the yellow wire from the rectifier. I connected the wires to the correct colors and voila! Voltage Meter readings in the 13v to 14v range with the bike running - and with the lights and flashers on! THANKS AGAIN to all and I will keep testing after rides and post updates if necessary. Oh, and as I said - I am no electrical expert, but I know how to connect wires of the same color. I DID NOT do the wiring on this bike! Sorry to bug you all about this embarrasing situation but it has been a learning experience. Also, if anyone wants an EXCELLENT description of an electrical system on these old bikes, etc... take a look at an official Yamaha R5 Service manual... way better than what's in the Suzuki T500 service manual, Hanes Suzuki T500 manual, Clymer Suzuki T500 manual, etc...
Congrats!! Glad to hear it was something stupid. It happens from time to time. now get it out there and ride!! _________________ Cycle Madness Mototrcycle Repair
Belvidere NJ 07823
908.475.2332
Have: 1998 VTR1000F, 1993 CBR900RR, 1991 Honda Shadow, 1986 Yamaha SRX600, *1978 KZ400B, *1978 GS1000E, *2002 CBR954RR
Had: 1970 Kaw A1 250 Samurai, 1978 Yam SR500 x2, 1978 DT400, 1980 Xs650, 1981 Honda FT500 x2, 1980 Yam XT500, 1973 Bultaco 250 Persang,1073 Honda CB350T....and thats all I remember off the top of my head.
* denotes Project bikes
Joined: Jul 10, 2008 Posts: 1639 Location: Galveston County, Tx.
Posted: Sat Apr 02, 2011 4:28 pm Post subject:
ericsattic wrote:
* UPDATE * ........ Oh, and as I said - I am no electrical expert, but I know how to connect wires of the same color. I DID NOT do the wiring on this bike! ......
I suspected sabotage! _________________ _________________________________
GONE.......WITH A PUFF OF SMOKE AND A BLUR OF SPOKE........
_______________________________________
Joined: Aug 31, 2010 Posts: 51 Location: Northern Virginia
Posted: Sat Apr 02, 2011 5:54 pm Post subject:
dorT500 wrote:
ericsattic wrote:
* UPDATE * ........ Oh, and as I said - I am no electrical expert, but I know how to connect wires of the same color. I DID NOT do the wiring on this bike! ......
I suspected sabotage!
The plot thickens... could there be linkage to the recent Tsunami in Japan and the problems at that nuclear power plant?
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