Hi there,

I have moded my mc21 with early mc18 electrics and pgm1.I disconnected the black blue wire and run my bike in a dyno.With some jetting and stock exhausts my bike measured 62.3 hps at the back wheel.I placed a set of old jha exhausts rejetted my bike in the dyno and it gained 1 hp at the high rpms and it losted about 6 hps at the midrange.What I want to say is that with the delimited pgm3 and stock exhausts the mc21s gain about 5 hps and adding a pair of aftermarket exhaust like tygas the bike gains with proper jetting and a few airbox mods another 7 to 10 hps!!Is there a set of aftermarket exhausts that will give my moded bike more horse power????Until now i have done some mods to the crancases, matched the cylinders to the crancases,rear head conversion,R cylinders with sp heads,reed spacers and placed early mc18 delimited electrics.What else can i do to gain more hps???????

Thanks in advance
Padelis