Battery upgrade
The original battery from a Yager GT 50 is not powerfull enough for the changes I plan to make on the scooter. The battery is only 5Ah and that is not enough. When driving it would do, but when idling the battery would be drained and because I allways drive with my lights on the upgrade was necessary.
The battery holder can hold a battery with the manimum size of 150 x 110 x 87 millimeter or 5.91 x 4.33 x 3.43 inch. After some searching I found one.
This Bosch battery, type YT12A-4 or YT12A-BS, fits precisely in the holder and has a capacity of 11Ah.The only drawback is that the positive and the negative are the wrong way around.
The install
First I removed the seat with the under-seat compartment, the rear fender, the taillight with the side covers and the battery holder. After removing the parts I cleaned the rear frame. Dispite driving it all year round and with winter tyres, the built up of dirt wasn't that bad.
Cleaned the battery holder and removed the foam blocks.
To be able to place the battery I had to switch the terminals. The positive has to go from the left to the right and the negative has to go from the right the the left. The positive is no problem, it is long enough to reroute. The negative is to short, it has to be extended.
From left to right: Original wiring, Negative extended (soldered and shrink wrap tubing) and taped and rerouted.
Te battery installed.
The install wasn't difficult, only extending the wires took some effort.
The negative is made up of 2 wires. One thin and one thick. The thin one is easy to solder with a normal soldering iron, the thick one requisers a bigger heat input. For the thick wire I used 2 soldering irons, 1 normal and 1 big. Placed them om the wire and had a colleague put the solder on, which gave a good soldered connection.
Next project: alternator upgrade