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Downtown 300 / Re: Have you guys tried lithium ion batteries?
« on: February 21, 2020, 06:02:43 PM »
Checked the battery's voltage and it was 12.something with it off and 14.something on and a bit higher at 3000 rpms.
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BTW, the three easiest places to take measurements are : at the battery, from the accessory socket (if yours is working) , and up under the front fairing. If you have a tender on the battery, that is ideal as well. Whatever is easiest for you to get a voltage.
Now, here is what my Downtown does and what you should expect: When I turn the ignition on, the voltage is going to drop into the 11.x . After you crank, it will go to charging at 13.9 v to 14.4v. I would test the battery and then change the regulator if it ever dropped to below 13.2v charging at any point after startup. If my Downtown drops into the 10.x volts , it is iffy if it will start. Sometimes I get lucky. I dont mean to be disrespectful. I want you to find the problem , and fix it, and ride! After two weeks you are still scratching your head on it, and I think you are making it way too hard on yourself. When I decided to run heated clothing, I had to figure out what exactly the Downtown could do, lest I find myself at the side of the road frozen. I decided that I needed to know the state of the battery and charging at all times. So I put an accessory-to-SAE plug in the accessory port, and ran it to an SAE voltage indicator. Since then, I have kept an eye on it just like I do engine temp, etc. But even if you dont want to mount one somewhere, It is always good to have in your toolkit ($12) , and it will attach to your battery tender cable ($8) (which you should also install to do battery maintenance). You might already have done so! While my wheel is off for tire change, I am currently installing a second 15A cable with SAE end connector to the glove box. Unlike the accessory port fuse, this fuse will be accessible through the cable window in the tub. I used a fishtape to pull the wire from the front through the tunnel . You can see both the tender cable and soon to be glove box cable here:
Ever get cold where you live or visit? Lithiums don't do well when cold.
Have you checked the voltage regulator? The VR may have failed and not charging the battery. You need a digital multimeter to make voltage measurements at the battery with scooter not running, scooter running at idle and scooter at around 3000rpm.its a 2013 with about 3300 miles on it. I have a spare reg rect just was a pain to install so I haven't done it.
What model/year is your scooter and how many miles?
Curious here.....where do you live?
If 10% ethanol gas was actually damaging a modern scooter or motorcycle --- my mega-mall, official Ducati, Honda, Yamaha, Kymco and Suzuki dealer would have gone out of business years ago.
Because ethanol free gas is not available where I live, nor is it readily available to, or used by, the vast majority of riders in the USA.
Stig
Sit back, relax, do something else totally unrelated to that frustrating project, something else you really enjoy that takes little or no skill. Then, when you have lost the feeling of wanting to RIP your hair out by the roots, go back and I will GUARANTEE it will practically jump back in place! I know. I had it suggested to me years ago. It works!