Can't get the engine to 6V....?

I have a V5X1M engine (so an engine of a PK50) under my 50 special!

when i Measure i get 30V out of the engine. i can't get it to 6V. please help me!!!

 

I got a Voltage regulator for the V50 special...?

i tried to instal it but it didn't work at all???

 

please let me know or help me!!

 

thank you

hi ..

 

the pk is an 12v engine, please use the regulator (item code 16163900) and change all bulbs in 12 volt bulbs

and the system will work !

 

good luck