Apparently its a high output coil and a good coil is needed on any engine.
Search the net for info and you wont find much on this product apart from spiel and unanswered questions. Okay maybe it does work as claimed and maybe it doesn't but if it does, why are the facts so hard to find ?
A few facts go a lot further than here say.
From the black ops website Vintage section
No dyno results are available for the Vintage CR500 Husquavarna CR500,,, yet.
No dyno results are available for the Vintage Maico Maico 490,,, yet.
No dyno results are available for the Vintage KX250 kx250,,, yet.
No dyno results are available for the Vintage KX 125 KX125,,, yet.
No dyno results are available for the Vintage YZ125 vintage YZ125,,, yet.
No dyno results are available for the Vintage YZ250 Vintage YZ250,,, yet.
No dyno results are available for the Vintage RM125 RM125 1983,,, yet.
I did not bother checking all the other sections however the ones I did check had no dyno results apart from a CBR100RR with a claimed increase of 3.5hp Wouldn't you think a company would have a decent set of testing results to back up a claim? I would.
With this in mind would you give someone $300 because they said this thing actually works? I think I would be more inclined to wait for unbiased testing results being available from reputable sources and leave my cash in my pocket rather than buy yet another miracle product.
Sorry MaxPower but .. naa Im not sorry Im dubious and I feel that's a fair call on this product .