Have the battery load tested. It could be failing. It's not a year old yet so maybe it's still under warranty. If you have been charging your battery @ 15vdc it could have been damaged. If the battery checks out good check the contacts on the solenoid. After 5 years they may be burnt and causing the issue. If burnt, Clean or replace them. This basic troubleshooting guide may help.
Thanks for the troubleshooting guide. I only charged the battery with a 1 amp motorcycle charger until it reached 14.75 V to see if the problem went away because I noticed that while running the battery voltage was reaching 14 volts and if I shut it off and restarted right away it would not make the grinding noise. So higher volts stops the problem.
What exactly did you replace in your charging system?
The 14 volts you see when the bike is running is the voltage from the VR and 14 is good. The voltage you see when the bike is not running should be 12.8 or a little higher.
13.75 at idle? Give it throttle and test again like 2k RPM it should be over 14v.
Yes it is over 14 volts
So the contacts are supposed to be smooth? I was thinking something didn't look right
Sounds like you solved the problem...the battery is weak. Youve said so in your previous post. 13.75v when you hit start button drops to 10 volts. Honestly that seems a bit low for these high compression engines. Even with the compression release if your battery is throwing everything it has to energize the starter, and as you said lights go off, you dont have enough juice left to energize the compression releases if you dont have enough power to keep the lights on. It could be a connection as perviously stated. Loose connections cause higher resistance, higher resistance causes current to shoot up to pass thru the resistance leaving no current to power up other electronics. Load test the battery any advance or auto zone can do so, if the vattery comes back good, check your connections, if they are all good then move to starter. Could be windings going bad, could be the solenoid going bad. But if it is you got 5 years from Curtis rebuild you could do that again or donna and eric are good ppl and stand behind their equipment they sell. And honestly 300 for a chrome 2.0k starter isnt a bad price. These are special starters not like buying a 180 dollar one that they made 250,000 vechiles that that starter will fit. They are cheaper because they know they are going to sell a shit ton of them. These are a little more expensive because they last a really long time, they are chrome and they are using not so cheap parts in them like the 180 dollar ones.
Yes they are smooth....overtime they get arc marks so this will make them no get good contact plus cause a click when you hit the start button....sometimes they will evem stick together and no disengage cause the arc marks.....low voltage on the battery will also cause the arc marks....always remember it takes just as much voltage to disengage a starter as it does to make it engage
Check this link out to see what it should look like.https://www.bigdogpartskingpin.com/products/big-dog-motorcycles-starter-solenoid-rebuild-kit-all-2005-2011-models