the picco .26 is a good motor but not as powerful as a true bb with a side pipe....the picco .28 is a power motor from what i hear, but some will say it a little short on the top end, but most engine modders can fix that....i choose a race tuned .28..it has massive low end and seemingly endless top end. the picco on the other hand was made as a stomp puller...but when fabrimactor say it wont make his tmaxx wheelie im shocked. my ninja would make that things do backflips...but just check out youtube and you will see it quite a powerfull motor that cant be beat for the money...it you got extra cash i would suggest the OS .28XZ...i plan on buying one just to campair it to my NINJA .28...the os should have more low end then the ninja....will see...