How to install phone holder with charger in Yamaha NMAX 155?

You need power to the coils.
Power to the ignitor.
Signal from the camshaft to make the ignitor work.

It's very complex and takes many steps. I would recommend you to find a pro to help you install the stator. More information about nmax

One potential issue that might be keeping your motorcycle from starting up is a clogged petcock. The petcock is a fuel control valve. It controls the gas flow between off, on, and reserve settings. More information about nmax

When you say holder do you mean for your car? A case or belt clip? There are hundreds of choices, for car, I highly recommend finding a vent clip mounted magnetic holder, the Note 4 is relatively large and heavy for a smart phone. I recommend browsing Amazon.com for the best deals! Good Luck!

The largest battery that fits the battery holder
i fitted a lager battery than the original factory as they last longer than the original more starting power
I cut the battery holder under the seat so to fit larger batt