David Humphreys

hi sorry for the long wait to reply , I email miller in Germany and they said no I don't need one also spoke to Yamaha and they said the same unless I changed the hole complete exhaust system or doing high mileage and flat out speeds so I'll be taking it off tonight. many thanks to all that all that replied to my message .

Hi many thanks, I have been in touch with dynojet and the closest map to the spec of my bike is M22-049-502 if no change they suggest taking it to a dyno jet tuning centre and make a map to suit ,so I will try 502 map first if no change then I will speak to the mechanic that installed the commander. speaking to other people they seem to think that I didn't need commander because I only changed the end cam and not the complete exhaust system .

hi thanks for replying the bike ran good no missing at all but that was with the stock exhaust on and no commander .

Hi I am new to this forum I have put a miller slip on exhaust on my XVS 1300 and it sounds great I was told by a mechanic that I had to put a power commander v on the bike because Yamaha run on top end of lean so I have done that . I have downloaded the maps for the commander there is about 14 maps for the make and model and year of my bike, none of which are for the miller slip on , there is vance & hines cobra but to name a few . I have tried most of the maps, most of them make the bike miss at low revs in traffic . is there a map for this miller slip on out there somewhere. and did I need a power commander in the first place ?? any feed back would be great. Regards Dai