There seems to be a lot of questionable logic and here-say thrown about when it comes to aftermarket exhausts, and I would love to hear one of the development engineers offer up their technical paper on it. Id say it does more harm then good getting a full system without proper tuning (plus its expensive getting a full system but we are pretty limited for slipon options!) - if you just want looks and noise then maybe just get a slip on? That being said many people dont run ECU flashes or fuel controllers and they feel their bike is ok - maybe im just being picky. I ran my S1R on this bike without a fuel controller for a while and it was ok but it had power inconsistencies and popped like crazy which made the torque and power curve all over the shop - I dont like the feeling my bike isnt 'just right' so I wouldnt do it for a long time. If your going a slip on option then a fuel controller or flash isnt really required as you arent getting increased airflow so you are just getting looks and a loud exhaust. Forgetting the obvious power you'd be missing out on, most aftermarket full systems are straight through so you are going to get a truck load of popping as most if not all stock bikes run lean for emissions requirements and you just make it worse by adding a full system as airflow is increased due to less resistance. No race licence required, installed and fully functioning in minutes, all at less than half the price.A PC (or other fuel controller) that has been tuned/mapped for an exhaust or a ECU tune is nearly always recommended by exhaust suppliers but its not a necessity. Now, with the YEC flash, one gets all the above, doesn't have to purchase a sub-harness and also retains all street (speedo and such) functions. Then include added cost for sub-harness to try converting for road use (prohibited by Yamaha). When one considers how much it costs to purchase a YEC ecu and an interface lead (both sold separately) from Yamaha and only available if one has a race licence. The answer that I gave to this question was "There are now!! do a search!! Now are there any numbers for the yec ecu compared to the stock hp/tq? and other differences? The software that was mentioned above comes with the flashed ecu, as does the tuning manual and data lead. This is the thread starter that I subscribed to. I keep getting a gut feeling that this "reflash" software is about to be leaked to the masses.ĭoes anyone else have this vibe or am I kidding myself? That said, I would be lying if I said that I wasn't interested in the gains that this upgrade offers. I (like many others on here) cannot justify the costs involved with purchasing a genuine YEC ECU or having the reflash service done to my stock unit. The YEC reflash and software being leaked to the public was the topic of this thread some time ago and as I said. I like the fact that I can delve deeper into the YEC ecu and influence the characteristics and performance of my bike, in the same way the public as a whole is starting to get to grips with fueling modules. I am glad that you are satisfied with your ecu flash. This forum like so many other forums are awash with inquiring minds. They learn how to calibrate fuel modules, ecu, build and modify engines. Type 2 is very interested in what makes things work and how they work. Type 1 just wants to ride and couldn't care less about what makes a bike run, as long as it runs. But I find there are two types (with some in the middle ground) of biker. I kinda half agree with what you say re: public as a whole unable to calibrate fuel modules. Otherwise Jett and the eBay guy wouldn't be offering the service. The cost effectiveness has been sorted at this stage, I think.
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