Service 9 volt starter battery?

Easy access from above without removing much. 15 minutes job.

For the past few months, my 2018 MXR has been intermitted black screen dead (no sound or noise from bike) when key is turned to On position. I suspected the 9 Volt to be the culprit. I successfully replaced the 9 volt battery last night and it has appeared to solve the key On problem. I have read many posts that the original 9 volt battery was the Energizer Advanced Lithium. When I opened by ACM last night, my battery was an Energizer Ultimate Lithium. Fortunately, the Energizer Ultimate Lithium is easy to find at many stores. Also, I was able to maneuver the ACM and get the access cover removed (it definitely tried my patience) to replace the 9 volt without pulling the main battery and disconnecting all the other stuff.

Superretard said:

View attachment 7664Easy access from above without removing much. 15 minutes job.

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Where did you get that batter connector from? For those of you pulling the black box out, are you pulling it out down below or up through the hole above near where the key is? Are you turning it sideways? How are you wiggling!!

Sam Evans said:

Where did you get that batter connector from? For those of you pulling the black box out, are you pulling it out down below or up through the hole above near where the key is? Are you turning it sideways? How are you wiggling!!

Click to expand...

Unscrew it under the seat , it is not located like in the alta video.

Hi Sam. The battery connector is located inside the ACM box. Once you remove the Delta wing, you will need to remove the screws that are holding the ACM. Once the ACM is loose, you will be able to adjust its placement just enough so that you can access the battery compartment to change the battery. Definitely, there is not much wiggle room space to work with during this battery changing process. Patience and finesse are helpful while changing the 9 volt battery.

So I am planning to do the 9V battery replacement on my 2018 SM next week. I watched the Alta video about the ACM extraction; it refers to a separate video that shows how to remove the main battery. However, I can't seem to find this video on Youtube. (I found this guy's teardown but in the end he just complains he can't figure out how to unclip the HV connector.)

Does anyone know where I can find the battery removal video?

Thanks!

You can actually replace the 9v without dropping the pack. It takes some finesse, but it’s certainly possible.

It definitely takes finesse and patience, but it is easier than dropping the main pack on the MXR. I see that you have an SM.

Okay well I am stuck mid-project, which is where I didn’t want to be — but I don’t see a way to get the ACM cover off without dropping the pack on my SM.

I was able to get all six ACM cover screws off, though not without drilling an access hole for the right side one, which was well under the structural rib no matter which way I turned the ACM box.

But having removed the screws, I simply cannot figure out how to get the ACM box low enough to allow the cover to slide off. I can get maybe 1/4”/6mm of clearance between the box and the structural rib before the ACM bottoms out on the cables/structure below, and although the cover is loose this isn’t enough room to free the cover from the recess in the ACM box.

Could this be an SM thing? Because I believe you MX guys were able to get this done but for the life of me I don’t see a way without dropping the battery.

It might be an SM thing? With the MXR bikes there was also limited clearance once the cover screws were removed, but the clearance was sufficient to be able to swap the battery and re-install the cover screws. You might need to use a small plastic pry tool (persuader) to help you in the process? Be gentle though.

At the end of the day, dropping the battery pack is not terrible. A second set of hands is helpful in that process. Take pictures of all of the battery connection that you disconnect. The connections have some unique engineering steps to disconnect them. I used a flat motorcycle jack to drop my battery back out of the bike.