09 CR runs great, no problems but battery light is coming on now

[Cjdesign]

After my stator burnded a change everything; stator, regulator and battery. but still have the light on when the bike was hot and iUndo the Harley fix! it worked for me. Now no more battery light on and 13V+.

Did yo do the new parts fix or just replace it with same new parts?

[Cooter]

If you just replaced the stock parts keep your eye on it. The stator likes to overheat. Here's why:

The stock VR os a 'shunt type' which means the stator is trying to charge 100%...100% of the time, and the extra electricity that it is working hard to make is just 'shunted' to ground. That makes the stator very hot. Changing the voltage regulator to a 'MOSFET' style helps because it only lets the stator charge as much as the electrical system needs, instead of 100% maxed out all the time. Those VR's are physically larger, but will fit in the stock location (barely). The best is to mount it where there's good airflow.

The 'Harley fix', is an add on harness in-line with the 3-leg stator output. It bypasses one of there stator legs to keep the stator cooler, but that also reduces the charging capacity of the whole charging system by 1/3. Thanks Harley for the 'fix'.

Drilling the rotor (or buying a drilled one) allows oil under pressure to cool the stator better

Buying or making a stator with higher temperature capacity wire also helps the system charge well without overheating

IMO, if you can only do one thing... the VR upgrade without the harley fix is the best option.







2500 miles on a CR! "and the 'Iron Taint 2015 award goes too..."

I'm jelly, have fun!