[Vulcan 1500 Bobber]

So I'm going about 95 miles an hour on my Volcano 1500 classic bobber and all of them the motor sounds hollow through the exhaust and I got no power all my lights are on and everything so I get a toad home check the voltage on the battery and it's down to 8 V it's a brand new battery so I'm assuming voltage regulator So my buddy put a Harley Davidson battery on it that was bigger than the one I have tried to start the bike up and 1 crank killed his battery is there something more than the voltage regulator that could be going wrong.

 

[Vulcan 1500 Bobber]

Hello guys new to the thread, So I'm going about 95 miles an hour on my Vulcan 1500 classic bobber and all of a sudden the motor sounds hollow through the exhaust and I got no power all my lights are on and everything so I get a tow home check the voltage on the battery and it's down to 8 V it's a brand new battery so I'm assuming voltage regulator So my buddy put a Harley Davidson battery on it that was bigger than the one I have tried to start the bike up and 1 crank killed his battery is there something more than the voltage regulator that could be going wrong? AI am also having the carb re jetted with a 170 main jet and am looking for a suitable big air kit. Any one know where to find those for this bike? Or will a 90' elbow with filter work. Also need to know the size of the intake port on the carb can't seem to find it anywhere.

 

[WFO-KZ]

If one crank killed a battery, I would be wondering if your engine is partly seized.

 

[9094]

Check the stator 3 yellow wire connector under the left rear engine cover for melting/signs of heat.

Then do the stator resistance checks with the connector unplugged, And the ac voltage output tests if it will start.

Also do the rectifier diode checks. Some videos:

 

[Kawasakian]

I think I would check to see if the motor turns over first. Remove the spark plugs, and turn the engine over by putting the on the center stand, and see, when in first gear, by by turning the rear wheel in direction of forward movement, will turn the engine over. If the wheel won't turn, you've probably seized the engine. If it turns over, then it's probably your starter motor. You can jump the two main terminals to turn the starter motor on. Sounds like one of the Hydraulic lifters went, and you lost that cylinder.

 

[WFO-KZ]

I agree with Kawasakian and that is why I first suggested a possible engine seizure (or increased resistance of engine internals).

I based this upon the following:

1) The OP noticing a definite change in engine sound and drop in power while riding at speed. A bad regulator or bad electronics or low battery should not change the sound of an engine or cause a drop in engine power.

2) The OP's battery going bad and then switching to a Harley battery that was killed after just one crank.

All of the above, can be explained by a partial seizure or some other form of increased resistance to engine rotation.

 

[Kawasakian]

If the motor is moving smoothly, the only other thing that cold kill a battery like that is the starter motor, but you wouldn't feel that while riding, and it would have no effect on your engine, unless it stayed engaged, then you would get sounds and smells, and possible catastrophic failure, if the starter blew apart. I'd check to see if the engine turns over. I suggest using the rear wheel method, as that checks the transmission also. I kind of think WFO-KZ hit the nail on the head here.

that

 

[WFO-KZ]

I kind of think WFO-KZ hit the nail on the head here.

Well maybe. I have been wrong before. 😁 But thanks!

It is such an easy check (rear wheel rotation method) that it is worth doing as step #1.
Also pulling the plugs may provide some clues as to what happened.

 

[Kawasakian]

Pulling the plugs makes the engine easier to turn.

 

[WFO-KZ]

Pulling the plugs makes the engine easier to turn.

Exactly, so you kill two birds with one stone.

 

[Vulcan 1500 Bobber]

If one crank killed a battery, I would be wondering if your engine is partly seized.

Got her started with new voltage regulator and battery. Went to go for a spin. Around the block, put it in gear and the cluch fluid was low, no fluids on The ground or anywhere else is there a. Inside spot the hydraulic fluid could leak into? Tried to start the again seemed flooded. Battery back on charger. I'll update when we tryit again.

 

[Kawasakian]

You need to get a factory manual. You could have this fixed by now. Theorhetically, depending how it's set up, the answer could be yes, or no. That's why you need the manual. You got the bike running, I would assume your hydraulic clutch slave has to be rebuilt. That's a given, it's not holding fluid, tight? Sounds like you have avoided catastrophic failure, which is a good thing, unless the sound comes back after it real hot. Sent you a P.M. with a little more info.