Charging problem

zanoknight · 02-25-2017, 03:17 AM

I have an old hunter Xingfu china bike (very similar to hawk) When i purchased it the guy rewired the bike because he honestly had no idea what he was doing (seriously). So I rewired the bike to the best of my knowledge and I got it to run. I bought a new battery since the old one was out of commission. Charged it and put it on the bike and wooooo I thought all was well. Started making cosmetic changes and what not. About a month later my battery dies. I'm still able to ride it just not able to turn anything on. I checked the rectifier and that was good, Checked the stator and boom it was a dud. Since i was going to be in there I decided to do both jobs. I replaced the stator and the rectifier. Charged the battery and tried it again. It turned on and everything worked. This time i decided to check my voltage readings. at idle my charging system was barely hovering 10v. At high RPM I was barely touching 12.7. Could it be a wiring problem on my end or is this normal readings? Because I read it's supposed to reach in the 13v at idle and 14v under high rpm. Any info is greatly appreciated I'll post a link of my youtube if you're interested at looking at the bike.

humanbeing · 02-25-2017, 04:39 AM

Which type of stator & r/r in there?
Standard stator config is somthing like (fullwave)

(Honda is simialr size BUT Side-Side-Side triangle bolt pattern, others https://item.taobao.com/item.htm?id=39508069418)
r/r = 12V full-wave type http://sanxin.com.cn/Exhibit/exhview.asp?pid=42 (5-wire type had extra voltage sampling wire that often in middle http://sanxin.com.cn/Exhibit/exhview.asp?pid=53 ... )
Some older shit is for those 6v http://sanxin.com.cn/Exhibit/exhview.asp?pid=29 , AC- headlight http://sanxin.com.cn/Exhibit/exhview.asp?pid=30 ...
Ac-light system had some sort of resistor thingy that protect the filament from burning which is meaning less in ALL-DC fullwave system...

zanoknight · 02-25-2017, 04:48 AM

The stator is just like the picture you provided and the rectifier is a 5 pin one. Just like the Lifan motorcycle rectifier.

humanbeing · 02-25-2017, 05:20 AM

5-wire had at least 2 type 3-in / 2-out or 2-in/2-out & sampling which as http://www.chinariders.net/showthread.php?t=16065

zanoknight · 02-28-2017, 04:11 PM

Im just going to have to retest my wiring. It only charges after 8,000 rpm and that doesnt seem right.

Ariel Red Hunter · 02-28-2017, 04:17 PM

Quote:

Originally Posted by zanoknight

Im just going to have to retest my wiring. It only charges after 8,000 rpm and that doesnt seem right.

No, it's not right. Should have the volts go up past 2000 rpm. Should be over 12.8 by 3000.

02-25-2017, 03:17 AM	#1
zanoknight Join Date: Mar 2016 Location: Chicago, IL Posts: 46	Charging problem I have an old hunter Xingfu china bike (very similar to hawk) When i purchased it the guy rewired the bike because he honestly had no idea what he was doing (seriously). So I rewired the bike to the best of my knowledge and I got it to run. I bought a new battery since the old one was out of commission. Charged it and put it on the bike and wooooo I thought all was well. Started making cosmetic changes and what not. About a month later my battery dies. I'm still able to ride it just not able to turn anything on. I checked the rectifier and that was good, Checked the stator and boom it was a dud. Since i was going to be in there I decided to do both jobs. I replaced the stator and the rectifier. Charged the battery and tried it again. It turned on and everything worked. This time i decided to check my voltage readings. at idle my charging system was barely hovering 10v. At high RPM I was barely touching 12.7. Could it be a wiring problem on my end or is this normal readings? Because I read it's supposed to reach in the 13v at idle and 14v under high rpm. Any info is greatly appreciated I'll post a link of my youtube if you're interested at looking at the bike.
	0

02-25-2017, 04:39 AM	#2
humanbeing Join Date: Mar 2008 Posts: 2,436	Which type of stator & r/r in there? Standard stator config is somthing like (fullwave) (Honda is simialr size BUT Side-Side-Side triangle bolt pattern, others https://item.taobao.com/item.htm?id=39508069418) r/r = 12V full-wave type http://sanxin.com.cn/Exhibit/exhview.asp?pid=42 (5-wire type had extra voltage sampling wire that often in middle http://sanxin.com.cn/Exhibit/exhview.asp?pid=53 ... ) Some older shit is for those 6v http://sanxin.com.cn/Exhibit/exhview.asp?pid=29 , AC- headlight http://sanxin.com.cn/Exhibit/exhview.asp?pid=30 ... Ac-light system had some sort of resistor thingy that protect the filament from burning which is meaning less in ALL-DC fullwave system... __________________
	0

02-25-2017, 05:20 AM	#4
humanbeing Join Date: Mar 2008 Posts: 2,436	5-wire had at least 2 type 3-in / 2-out or 2-in/2-out & sampling which as http://www.chinariders.net/showthread.php?t=16065 __________________
	0

02-25-2017, 04:48 AM	#3
zanoknight Join Date: Mar 2016 Location: Chicago, IL Posts: 46	The stator is just like the picture you provided and the rectifier is a 5 pin one. Just like the Lifan motorcycle rectifier.
	0

02-28-2017, 04:11 PM	#5
zanoknight Join Date: Mar 2016 Location: Chicago, IL Posts: 46	Im just going to have to retest my wiring. It only charges after 8,000 rpm and that doesnt seem right.
	0