Bike cranks then acts like it’s slowly dieing

[CitizenF0ur]

Hello. I have a 2001 Hayabusa that has been giving me issues for quite some time due to something in the Electrical not charging the battery while riding. I’ve brought it to my local Suzuki dealership (unless they’re getting payed they won’t properly test the bike. I’ve also brought it there for over heating issues because the fan wouldn’t turn on when the bike was warm so it would overheat if I caught enough redlights an stop signs an I installed a override fan switch after they told me the fan turns on but doesn’t) anyways I’ve replaced the battery and after 3 months of riding it died again, I charged the battery again and it died within a month an then it got worse enough that it died everytime I turned the bike off. I know that something isn’t charging the battery properly while I’m riding an I was able to turn it on a couple weeks ago and run it for a few minutes but I went out today after charging my battery and it wouldn’t start up at all. It cranks a couple times wouldn’t start and after each crank it sounds like it’s getting less and less power. I hear the fuel pump turn on my lights turn on but each crank it slowly dies n dies until it won’t try cranking. I noticed the last time I started it that the light dim when I rev the bike.

Please can someone help me. I love this bike and don’t want to pay the premium of a new Hayabusa.

PS I keep my battery on a charger/ Trickle charger

 

[WuzzaCBXRider]

Sorry I can’t help with why your battery isn’t being charged while riding. But let’s get the terminology right about how it’s hooked up with what you say is a “charger/Trickle charger”.

A trickle charger never stops charging, it just charges slowly as for the name trickle. Continual charging, even trickle charging can ruin a battery by over charging. Now a battery tender is also a charger but it only charges a battery if its voltage drops below the accepted level. It never over charges a battery.

The stator (your alternator) is something that can certainly go bad after 20+ years but it can be tested. Shop labor near me ranges from $130-$180 per hour. If you’ve really had the battery hooked up to a trickle charger instead of a tender (that) might be the issue.

 

[Bumblebee]

/\/\/\/\.....this.....gen 1s are known for regulator/rectifier issues....yours sounds like it is intermittent.....

Do you have a voltmeter? If so check the voltage with the bike running.......think of this like a car with the alternator dying.......

 

[Hayabusa Wannabe]

Welcome to the forum @CitizenF0ur.

 

[pashnit]

Swap out the stator & rectifier. You can buy them as a kit on eBay.

 

[CitizenF0ur]

/\/\/\/\.....this.....gen 1s are known for regulator/rectifier issues....yours sounds like it is intermittent.....

Do you have a voltmeter? If so check the voltage with the bike running.......think of this like a car with the alternator dying.......

I did but now the bike won’t start

 

[CitizenF0ur]

Swap out the stator & rectifier. You can buy them as a kit on eBay.

I’m gonna do this thank you!

 

[Kiwi Rider]

I’m gonna do this thank you!

You should also fully recharge the battery and then LOAD test it, it is absolutely vital that the battery is in tip top shape.
Also, replacing a stator on the Busa is no simple job, if you have never done this before, be sure to get the OEM service manual and read it well before attempting this job.
The reg/rect replacement is relatively easy.
Look out for burned/melted connector plugs/wires between the stator harness and the regulator.
If there is any damage or signs of damage, it must be repaired properly, new connectors, new wire etc.
Once repaired your Gen 1 will be back and you will be happy!