![]() ![]() It's good in that you're not going to be unpleasantly surprised going down the road with a cold engine and have it cut throttle at 30 MPH. This could be a plus or minus depending on the way you look at it. The X4 does not just have a rev limiter like previous models but also a speed limiter at 52 MPH (I'll be glad to be wrong on that), which is why the solution I found is important as it modifies the VSS signal.Īn additional benefit to the Weller Racing ECU flash is that they've eliminated the cold engine stuttering/rev limit 'feature' Remember, the stock speedo is 2 MPH slower than actual GPS\radar verified speed. Sheave testing without this device or something similar is going to be fruitless (for top end\speed improvement). I don't believe lighter weights are the solution (for top end) and may actually lower your top end, but we'll know soon. For now, the device I'm using is relatively cheap and I feel necessary to use with any sheave if you plan on raising your top speed. There will be a solution in 2018 for flashing the stock chip but I don't want to disclose anymore than that. I believe the stock sheave setup was engineered to max out at the rev limiter but I hope I'm wrong. These wind gusts (and freezing cold) have limited my test runs but with a stock sheave I was able to get 53 MPH via GPS, that's 4 MPH faster than I was able to previously get stock, which was 49 MPH via GPS. There is speed sensor (blue connector) located right next to the gear oil dipstick under the passenger side seat This thread is discuss the above as well as other possible solutions. We also already know that the current known strategy is a chip flash (a work in progress). The speed limiter is still at 51, but at least on 2019 models, you're actually going 51. ![]() UPDATE: According to my dealer, Yamaha re-calibrated the speedo for 2019 so the speedo is supposedly accurate. Going with larger tires will at best bring you up to an actual 51 MPH (27" tires makes the speedo accurate). What's worse is that the Yamaha speedo is already 2 MPH slower than actual speed. We already know that Yamaha in their infinite wisdom decided not to only rev limit the X2/X4, but to also speed limit it to 51 MPH (this may be 53 MPH for 2019 models). I don't own stock in SpeedoHealer and none of the supporting vendors carry this product (that I know of), so if you're wondering what's in it for me? It's lonely at the top and I'd like to see more X2/X4 members in the 60 MPH club. He's not very mechanically inclined and has to rely on others to do mechanical chores\maintenance for him. He is a large reason why there are 'vendor wars' as he perpetuates the hate and trolling some unfortunately like to feed on. Timothy Ward specifically is responsible for this misinformation and I would take anything he has to say with a grain of salt. You're just hearing about this now? Maybe because you've been subscribing to the wrong forum and/or FB group who actively filter out this success story about being able to defeat the limiter whenever it's brought up. Yes, the speed limiter has been defeated/bypassed for this long. UPDATE 2: Weller racing has cracked the ECU! UPDATE 3: 2020 models (well at least the XTR) can now run 56 MPH via speedo. ![]()
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