New DeRestricted CDI Worse Than Standard?

I bought a this http://www.pedparts.co.uk/product/103/cdi-ht-coil-gilera-piaggio-engines

Its Branded as a RMS CDI.

When i fitted the CDI i felt that the bike no longer had it previous speed anymore and as if the CDI was limiting me compared to my Stock CDI.

Ive fitted my Stock Piaggio CDI again.

Can anyone help me as to why its slower?

 

I bought this one - http://www.pedparts.co.uk/product/103/cdi-ht-coil-gilera-piaggio-engines

Changed back to the Stock CDI and it strangely preformed better.

 

you might find the advance curve is too much if you are running stock cylinder/pipe or something? i have found they they perform pretty well on most derestricted bikes (even the derbi sendas and stuff use the same CDI) i mean if you can make 7hp on a standard cylinder and pipe then thats enough really. what setup you running?

 

Honestly unless your running a 70cc kit. It is pointless in buying a desrestricted CDI. there a waste of time and money. I Have a Piaggio NRG power DD 2008 50CC. All i have done is put on the Polini high speed variator kit. New contra spring, and a sport pipe. And i get 55MPH on the flat (GPS). no problems at all. Stay with the stock one.