i run pipe without link pipes didnt make any difference at all still runs clean through the ful rev range and pulls from anywhere in the revs full throttle partial throttle al very clean and crisp i would say your carbs need a proper clean ultrasonic is the best way to clean them
I am with Daviee,
I have read so much about the S/S headers and collector, I have read stuff like if it doesn't have the 1-2 & 3-4 small diameter links between the base of the down tube the bike will run sluggish and have a loss of it's mid range power.
I replaced my original down tubes after they perforated at the base of the collector about 2.5 years ago, I also fitted a round S/S Pipewerxs Round Sports Can at the same time,
(Road Legal with removable baffle in situ) and have to say that my experience had been the same as Daviee's.My bikes hits 130mph in 6th (Top) gear at 10,000 rpm and will pull on until 142 mph top end with a 16 tooth front sprocket (Sat Nav not Speedometer as speedo is generous to the tune of 4 MPH), speedometer show 146 mph. Would the bike do any more? Don't know pure speculation.
The bike starts sweet, 25% choke in really cold weather, no choke at all if above + 2 or 3 degrees, do not touch the throttle, dab on the starter button bike fires instantly, back the choke off after 15 seconds and bike ticks over sweet.
I have found the bike to perform well with the S/S exhaust system on with no power loss issues what-so-ever, I'm not saying it's better than the Yamaha system, but, it is just as good and looks so much better.
I purchased my S/S Headers on EvilBay I honestly can not remember what I paid for the but I am guessing about £200-£220, and the Pipewerxs can was £180.
The RRP for the Yamaha end can is over £600 and the down pipe and collector over £1200, the £400 I paid for my system pales into insignificance compared to the Yamaha kit, and as said earlier IMO looks a lot better, it performs as well and does not rust, Win, Win.
I tried to go back through my EvilBay history to try to find the S/S headers, but, can only go back 2 years for some reason.