Hyosung dies, blows fuses

**sapperj** · 17th September 2011, 09:22

Have a weird problem with my Hyobag... Blows a fuse when I switch it off, either by the kill switch or key... also indicators wont work when bike is moving, yet everything works while bike is in neutrel and running, or just ign on... WTF?
Any ideas as to how to trouble shoot this problem? I have replaced battery a month ago due to it dying and not holding a charge... could this indicate regulator fault?
Cheers for any help.
Jason

**Spearfish** · 17th September 2011, 10:05

Is probably going to be a test of patience and the purchase a half decent multimeter and if your really keen a service manual. It could be anything from a faulty component to a broken wire in the loom some place.

Good luck.

**sapperj** · 18th September 2011, 11:35

So I have stripped the bike down, cleaned all the electrical connectors and looked for exposed wire etc... alot of oil and dirt on the sidestand switch... and clutch switch was faulty, easy fix... also checked manual for resistance specifications for regulator / rectifier, Hmmmmm can only get a reading when checking using standard resistance setting, when I switch over to K etc I get nothing, but appling conversion the readings are low and dont seem to get readings between certian pins... dont know if Im doing it properly etc... So i pluged it back in and checked voltage to battery with bike running at 5000Rpm, 13.2V... Low, did magneto no load test and readings should be between 67 - 99V.... between 2 pins I only got 8.5V and the others a max of 64V. So If magneto is shitting itself, would this fuck the regulator? and could these 2 things combine to cause main fuze to blow as well as other previously mentioned problems??? Some advize would be appreciated before I go running off to buy new magneto and reg.
Chur

**bogan** · 18th September 2011, 11:39

Do a resistance check on your stator (proper term for magneto), will be three wires coming from it to your reg/rect right? Unplug the connector and check between all combinations of those pins (3 values), and also check the resistance between each of those pins and earth. Post numerical results.

**steve_t** · 18th September 2011, 11:39

Fuse blows when you turn the bike off? I'm picking a short in the ignition switch or the wires to it

**sapperj** · 18th September 2011, 11:50

Resistance between all 3 pins = 002 / 001 ohms, Tested as follows.
- on 1. 2=002, 3=002
- on 2. 1=002, 3=001
- on 3, 1=002, 2=001
Slightly lower between pins 2 and 3

As to switching off, it doesnt matter if I use kill switch or key, or stall, as soon as engine stops the fuze pops, and I think it did it once when i went to use indicators as a set of lights friday... even when i replaced fuze, indicators didnt work and the horn sounded really week, but while riding it didnt blow it. strange aye

**steve_t** · 18th September 2011, 11:52

Originally Posted by sapperj

As to switching off, it doesnt matter if I use kill switch or key, or stall, as soon as engine stops the fuze pops, and I think it did it once when i went to use indicators as a set of lights friday... even when i replaced fuze, indicators didnt work and the horn sounded really week, but while riding it didnt blow it. strange aye

Oh yup. Never mind me. Can't read properly

**sapperj** · 18th September 2011, 12:05

Originally Posted by steve_t

Oh yup. Never mind me. Can't read properly

No worries man... but yeah I checked all wiring to switch etc... got me baffled lol

**steve_t** · 18th September 2011, 12:13

OK, I'm going with a dying Reg/Rec

**bogan** · 18th September 2011, 12:19

Originally Posted by sapperj

Resistance between all 3 pins = 002 / 001 ohms, Tested as follows.
- on 1. 2=002, 3=002
- on 2. 1=002, 3=001
- on 3, 1=002, 2=001
Slightly lower between pins 2 and 3

As to switching off, it doesnt matter if I use kill switch or key, or stall, as soon as engine stops the fuze pops, and I think it did it once when i went to use indicators as a set of lights friday... even when i replaced fuze, indicators didnt work and the horn sounded really week, but while riding it didnt blow it. strange aye

Sounds like there is probably a short in the stator windings between 2 and 3. Did you check the resistances to earth as well?

Also, will it still blow fuses if you unplug the rec/rect from both the stator, and battery?

**sapperj** · 18th September 2011, 12:26

Yes I checked all 3 pins to earth, multimeter reads open circut... zero ohms.
If it has shit itself that might explain the low voltage on one of those phazes...

But why doesnt it blow when the bike is running / stopping in the garage... only happens when I ride, even if I just go to the end of the street and back.
Arghhhhh