cheroy
New member
So i have this problem.... problem being my 2004 viper s any help is appreciated
i dont think i have good voltage output from something. voltage regulator or stator . or something is pulling voltage down. i have yet to figure out how to and actually measure the system voltage as i am at this point too annoyed and here's why.
while out riding today something odd began to happen.
my tach display went out and machine began to run very rough. to the point where i fouled the plugs and forward momentum came to a halt. luckily i do carry spare plugs and the required tools.
so new plugs and the machine started no problem. continued to run rough of course. it was at this time i realized i had no taillight and head lights were dim. they are new 55/60 halogens as of the day before. i unplugged the head lights and voila; the display came back and tail light began to work. plug even one head light in and back again to rough idle smoke show. unplugged it shall be and dark it was.
i continued riding home, in the dark. i noticed the back light in the display will go dim if you apply the brakes.
i made it home no problem and now its parked. now im reflecting on some things that seemed "off" over the past few weeks.
the machine has e start, so of course a battery. lately battery doesn't seem to be charging. i need to keep a battery maintainer on it to keep it charged. i store my sled in an unheated shed. so i figure it may just be the cold cold weather. I've been using the pull start last few trips. but lights were always good.
a few weeks ago i swamped my sled. it didn't flood the engine compartment but i did get quite wet. when we retrieved it there was no standing water in the engine bay. it started as soon as i hit the key and i rode it home. thawed it with a space heater and every thing seemed fine.
i think keeping the battery on the maintainer was masking a problem, as the battery was "topping up" the required system voltage. leaving the maintainer off i eventually drained the battery ( i have yet to check voltage)
any suggestions???? please
i dont think i have good voltage output from something. voltage regulator or stator . or something is pulling voltage down. i have yet to figure out how to and actually measure the system voltage as i am at this point too annoyed and here's why.
while out riding today something odd began to happen.
my tach display went out and machine began to run very rough. to the point where i fouled the plugs and forward momentum came to a halt. luckily i do carry spare plugs and the required tools.
so new plugs and the machine started no problem. continued to run rough of course. it was at this time i realized i had no taillight and head lights were dim. they are new 55/60 halogens as of the day before. i unplugged the head lights and voila; the display came back and tail light began to work. plug even one head light in and back again to rough idle smoke show. unplugged it shall be and dark it was.
i continued riding home, in the dark. i noticed the back light in the display will go dim if you apply the brakes.
i made it home no problem and now its parked. now im reflecting on some things that seemed "off" over the past few weeks.
the machine has e start, so of course a battery. lately battery doesn't seem to be charging. i need to keep a battery maintainer on it to keep it charged. i store my sled in an unheated shed. so i figure it may just be the cold cold weather. I've been using the pull start last few trips. but lights were always good.
a few weeks ago i swamped my sled. it didn't flood the engine compartment but i did get quite wet. when we retrieved it there was no standing water in the engine bay. it started as soon as i hit the key and i rode it home. thawed it with a space heater and every thing seemed fine.
i think keeping the battery on the maintainer was masking a problem, as the battery was "topping up" the required system voltage. leaving the maintainer off i eventually drained the battery ( i have yet to check voltage)
any suggestions???? please
How is your spark with both the e start and the recoil?. How old is the battery?
Devilin AblueDress!
New member
I have read of all kinds of weird random symptoms that ended up being a junk battery causing them. Check out your battery, make sure its holding correct charge, and holding volts with a load.
I have seen a bad stator cause the low light symptoms and no tail light no brake light and dimming dash lights.
super1c
Super Moderator
If its a true viper s it did not come with e start so it has smothing coils to prevent the e start sled symptoms. Add on e starts are separate from the electrical system. I would look for harness rub through. Also i would check every wire connection seeing you got it wet. Clean and use some grease on it. The cdi could also be wet, might want to take it off and bring it in to dry really well. A damp cdi can cause all kinds of electrical problems.
cheroy
New member
Update
e-start is the add on kit from yamaha
because i lost my cell phone on the trail the other night i had to go for a snowmobile ride today. i was lucky enough to locate my phone rather quickly. with a couple of WOT passes on the lake i had been out for about 45 min. when i got back i plugged the headlights back in. to my surprise the speedo did not cut out, headlights were bright. i shut it off and tried the e-start......i started to turn over then dies. much better than nothing when you turn the key like the night before.
i got it going again and put as much electrical load i could think of on it. helmet, full on grips and thumb warmer and high beam lights. measured the 11.4vdc across the battery. shop manual says the following
AC Magneto 14V 20A @5000
Rectifier no load DC 14.1-14.9
i put the battery on a charger fora bit and brout it up to 12.4V.
removed the belt
started the engine and let it warm up to smooth idle 1800rpm
applied all electrical loads
throttled the engine to 5000ish rpm
volt meter said 11.7v
I could be completely wrong but i would expect to see 14ish volts for that test.
schematic says .....
CDI gets power direct from stator pickup coil on W/G & R/W
W/W/W feeds the voltage regulator/rectifier.
Load side of rectifier (R) has condensers tied to it
As well it also feed the load control relay and starter circuit.
i am assuming the battery is charged via this connection to the the starter circuit
so about the rectifier or stator the is the question
or am i going about this all wrong
e-start is the add on kit from yamaha
because i lost my cell phone on the trail the other night i had to go for a snowmobile ride today. i was lucky enough to locate my phone rather quickly. with a couple of WOT passes on the lake i had been out for about 45 min. when i got back i plugged the headlights back in. to my surprise the speedo did not cut out, headlights were bright. i shut it off and tried the e-start......i started to turn over then dies. much better than nothing when you turn the key like the night before.
i got it going again and put as much electrical load i could think of on it. helmet, full on grips and thumb warmer and high beam lights. measured the 11.4vdc across the battery. shop manual says the following
AC Magneto 14V 20A @5000
Rectifier no load DC 14.1-14.9
i put the battery on a charger fora bit and brout it up to 12.4V.
removed the belt
started the engine and let it warm up to smooth idle 1800rpm
applied all electrical loads
throttled the engine to 5000ish rpm
volt meter said 11.7v
I could be completely wrong but i would expect to see 14ish volts for that test.
schematic says .....
CDI gets power direct from stator pickup coil on W/G & R/W
W/W/W feeds the voltage regulator/rectifier.
Load side of rectifier (R) has condensers tied to it
As well it also feed the load control relay and starter circuit.
i am assuming the battery is charged via this connection to the the starter circuit
so about the rectifier or stator the is the question
or am i going about this all wrong
02YamiSxViper
New member
Sounds like a bad stator to me. All the symptoms lead to that direction.
voltage test makes me suspect but do you eliminate the smoothing condensers with the add on kit?
if you do, unhook the battery terminals and plug the smoothing condensers back in and check out how the sled works for headlight,etc if it runs poorly or has the basic same problems the stator would need replaced, if good, i would load test the battery at a auto parts store if you dont own a tester.
if you do, unhook the battery terminals and plug the smoothing condensers back in and check out how the sled works for headlight,etc if it runs poorly or has the basic same problems the stator would need replaced, if good, i would load test the battery at a auto parts store if you dont own a tester.