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Post by Deleted on Nov 25, 2011 15:58:03 GMT -5
I have a nice round trip ride that goes from here out to 2 large local lakes (Sharon Harris and Jordan) then back. Its about 40 miles or so. Anyway I stopped at the first lake which is a long walk back to civilization. Parked and stretched my legs a bit, went to leave and my battery was dead. Kick started it and my turn signal flasher was buzzing lol sounded like an automotive elec. fuel pump. Battery was so dead the gas gauge would not even work with the key on and this low voltage messed with the flasher. Got home and put a meter on the battery terminals. nearly 17 volts!!  Under the rectifier it had paint on the frame. I stripped the paint off the frame where the rectifier mounts plus the finish off the rectifier itself with a stone on a die grinder. It now has 14.5 volts at road rpm (5500 or so). Has this happened to anyone else? I am surprised that battery lasted almost a year with over 16 volts being thrown to it.  |
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Post by Deleted on Nov 26, 2011 8:45:49 GMT -5
I forgot the mention there is a green wire attached to the same place the rectifier is. I sandwiched this green wire between what is now bare metal on the frame and bare metal on the rectifier. The problem might have been this green not getting good ground.
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Post by 90GTVert on Nov 26, 2011 9:24:56 GMT -5
Bad grounds have been known to cause all sorts of funky issues on these things.
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Post by Deleted on Jan 16, 2012 11:06:18 GMT -5
as for why mine started charging correctly after i stripped its mounting point down to bare metal, that must have been a fluke. the grinding on it with the die grinder must have done something because it doesnt charge at all anymore. I didnt notice when it stopped because i use a battery tender now.
Anyway....
what an adventure this issue has turned out to be. I have 2 new 2010 QT-3s here ready and decided to check the charging voltage before i let them go because i was curious what it would be compared to my identical bike in light of the above problem. they were both 16+ volts.
both new bikes rectifiers were tried on my bike both would charge at 16+ volts. all 3 bikes (mine and 2 new ones) the lights would not work with a new rectifier from a different maker. all 3 have yellow and white reversed from what my diagram shows which works with the junk rectifiers but not with good charging replacements. all 3 are 2010s
so in short, they all charge high and they all have yellow and white reversed. the fix is to replace them with a good quality unit and switch yellow and white in the connector at the rectifier.
Simple explanation to a not so simple problem. I assumed my wiring diagram was wrong because the positions of the pins would ohm correctly using the way it was wired as a reference and the specs in the dia. turns out they are wired differently than the rest of the world and the diagram was right. I spent a long cold dark night on Saturday night trying to figure it all out before the buyers came to get them on Sunday (yesterday). Some other wires, they just changed the wire color but the wires would go to the right place in most cases, sometimes not. Some were backwards in the connectors like the fuel gauge would read full when empty, and read empty when full and other interesting things.
What I have learned on these chinese scooters finally is to assume everything on them is wrong, check every nut and bolt and wire on them. I know you guys dont work with new-out-of-the-crate bikes much but what i have learned is to charge the battery and hook it up and check ALL the lighting before putting any body panels on.
In retrospect, all the 2010s i have assembled from this maker have had some electrical problem right out of the box. You would think the little fellow assembling them would see it and stop....fix it or report it to the boss etc....
Well no maybe not.
Things are different in Communist China. You are expected to do your work right the first time, never make a mistake and produce the numbers they tell you to produce or woe be unto you if you dont. Ive seen pictures of where they have an outline with paint or tape showing where every tool goes, where every piece of equipment goes, where you walk and even where you stand...everything.
The poor fellow that did cross the wires in the places ive found and other things either saw it and was too afraid to speak, or was so brain dead from working like a slave that he didnt notice. Better quality control inspections would have caught these things.
So basically these come in a crate as a bunch of 'put-together' parts but not exactly 'assembled' if that makes any sense. Thankfully all these are excellent quality factory 72cc motors with good Standard of Japan unsealed carbs making my final sale price worth all the hassle. they even have had genuine gates belts on them not some chinese no name.
I like working on them but chasing factory wiring mistakes is not fun.
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vvtr
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Post by vvtr on Jan 16, 2012 14:12:09 GMT -5
that;s mental lol!!!!
over here we have 'bikes direct' or whatever theyre called now.... when you buy a bike from them it comes in a box like that, half assembled.
its a major cause of dead scooters tht these things go out on the road, assembled by inexperienced people with no proper pdi checks.
that imo is why some people say the chinese stuff is gaarbage... if its built & set up proper then there's nothing wrong with it!
respect to you for finding the crossed wired & dodgy reg!!
a mate's yammy virago was charging at 29v lol & it boiled the battery dry, made a mess of the chrome as well when it finally burst!
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Post by Deleted on Jan 16, 2012 14:48:52 GMT -5
29 volts wow. these have been 16+ but my first battery lasted 8 mos that way. The 2011 ones I have had were dual rear shock instead of single which tells me they have attempted to improve upon what they are making....and I dont recall any of them having electrical issues however I dont remember check the charging voltage....we shall see whats in the next crate lol.
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Post by Deleted on Jan 16, 2012 15:07:39 GMT -5
so in the next crate is yet another 2010 with the same problems:
red and white reversed on the rectifier plug
kill switch wires reversed making 'kill'=run and 'run'=kill
fuel gauge wires reversed making a full tank read empty and an empty tank read full.
regulator charging at over 16 volts
...and lord knows what else lol
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vvtr
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Post by vvtr on Jan 16, 2012 16:10:12 GMT -5
lol maybe they just cant read the writing!!!
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Post by 90GTVert on Jan 16, 2012 16:21:54 GMT -5
Chinese scoots certainly keep you on your toes. It's a shame so much stuff differs from scoot to scoot in many cases. Would be cool if they were good differences or options, but no, just the "let's see what's lying around" type of manufacturing.
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Post by lauriejennifer on Jan 16, 2012 18:51:48 GMT -5
Even my Kawasaki supermoto has an issue with the rectifier/regulator. They are famous (famous!) for having a weird engine surge around 6500rpm. Why? Because the r/r isn't entirely properly grounded. if you add an extra grounding wire, this strange engine surge goes away. LOL I couldn't imagine hastily made Chinese scooters being any better.
I despise electrical issues. Glad you're able to get it sorted.
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Post by Deleted on Jan 16, 2012 19:25:05 GMT -5
Even my Kawasaki supermoto has an issue with the rectifier/regulator. They are famous (famous!) for having a weird engine surge around 6500rpm. Why? Because the r/r isn't entirely properly grounded. if you add an extra grounding wire, this strange engine surge goes away. LOL I couldn't imagine hastily made Chinese scooters being any better. I despise electrical issues. Glad you're able to get it sorted. thats originally what i thought the fix on my 2010 QT-3 was going to be..I wasnt so lucky lol Im glad yours is sorted now though  |
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Post by lauriejennifer on Jan 16, 2012 20:15:59 GMT -5
Even my Kawasaki supermoto has an issue with the rectifier/regulator. They are famous (famous!) for having a weird engine surge around 6500rpm. Why? Because the r/r isn't entirely properly grounded. if you add an extra grounding wire, this strange engine surge goes away. LOL I couldn't imagine hastily made Chinese scooters being any better. I despise electrical issues. Glad you're able to get it sorted. thats originally what i thought the fix on my 2010 QT-3 was going to be..I wasnt so lucky lol Im glad yours is sorted now though Oh, I never actually bothered fixing it. LOL I wasn't kidding when I said I hate electrical problems. This thing doesn't ride well in the rain either, as the battery is so exposed. Heh. I just try not to cruise at 6.5k rpm. And if I notice the bike surging funny, I look down to see what my rpm is at. If it's in that range, I either change gears, slow/speed, or just shrug and ignore it. I know, I know: I'm terrible. |
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Post by Deleted on Jan 17, 2012 0:15:01 GMT -5
haha lazy!
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Under the rectifier it had paint on the frame. I stripped the paint off the frame where the rectifier mounts plus the finish off the rectifier itself with a stone on a die grinder. It now has 14.5 volts at road rpm (5500 or so).
