saby

Yep, just like a roller, for max 25 hp, fi 200 is enough

Roller you can use an ac motor roler

Yes

But in most cases i put it to pickup wire

No, works ok

Yes

Pin 48, 49 is rpm pins, need a hall sensor and a pullup resistor, a koso rpm adapter and an optocoupler becuae it workson 12v That's it

Works verry good!

I told five times buy a koso rpm adapter an finish the trying with capacitive pickup, it changes fom engine to engin, and even hot and hotter, never works good! A question for chili I measused a piag 4t iget, and i get half of engine rpm, i need to write 0.5 to rpm signal, but i cant, what to do?

U must use a resistor plug and a resistor cap

I use a charger for a makita 12v drill

Racing-planet.de Koso rpm adapter Optocuples is 1 euro in electro store

Optocoupler

Rpm adaptes signal goes to an optocoupler then to arduino

I use a hall honeywell from a fiat punto, and a koso rpm adapter works without any problem. The phenomen i hawe earlier like you that works first time, and second time not, how the bike warms uses smaller energy from spark and you get interference, when i buy the koso adapter problem gone