Warning light while racing

[gpowell68Y]

Last weekend at Willow Springs 3/8 mile flat track race on my 2018 modified Alta. Suspension by Durelle Racing.
I kept seeing the warning light come on after a lap or two. Can someone tell me what causes this? Outside temps in the high 90's. Always in map-4.
Could this condition reduce power? Seemed to stay with the 450's for the most part tho got passed for the lead with 2 laps to go. Ended up 2nd in the Super Senior class (+60)

 

[Fog 25]

This should answer you question. you might have to run it in map 3 after the first lap on hot days.
A Guide to Thermal Limiting

 

[Philip]

This looks like an MX, right? They can overheat on hot days if you do a lot of WOT riding, especially in Map 4.

You may want to try using this fan to keep the battery cool on hot days:
Arctic Cove MBF0181 18-Volt Bucket Top Misting Fan https://www.amazon.com/dp/B00LFUQ0MG/ref=cm_sw_r_cp_apa_i_Tqn8EbWZ4KK9H

I like the No Harley Davidson sticker!

 

[VINSANITY]

More importantly I noticed this call to arms on your bike

 

[TCMB371]

Definitely going to need some external cooling on the battery during warmer days (90+). While rapid charging, I use the mister fan + water bucket setup that Philip linked to and it works well to keep the battery temps down. This is advantageous for two reasons: 1) The bike will charge its fastest since the charger/bike monitors battery temp and reduces current if temps get too high. 2) It will reduce battery temps at the beginning of your ride, giving you a larger thermal ceiling and reducing the chance of hitting the thermal limiter.

On hot days here in SoCal, particularly at faster, loamier tracks like Cahuilla Creek and Glen Helen, if i dont use the mister fan while charging, its almost guaranteed ill hit the thermal limiter on my next ride out after charging. Because of that, 5 gal bucket full of water + the mister fan is part of the standard equipment i bring to the track with me.

I explain the setup here at 10:14

 

[Philip]

We used an Arctic Cove mister cooling fan on people during the NE 24-hour Challenge race last year. It worked awesome!

 

[snydes]

We used an Arctic Cove mister cooling fan on people during the NE 24-hour Challenge race last year. It worked awesome!

Yeah, our intentions were to use it for the bikes, but that went out the window as soon as we realized how great it worked on the riders...

 

[enjoythesilenc]

maybe an aircooling plate could be inserted into the central septum of an alta battery?

Energica motorcycle battery housing