![]() I do it sometimes on the track but can't imagine any reason to do it on the street. Clutchless downshifting is possible but only when revs and load on the gearbox are low, to avoid gearbox damage and upsetting the balance of the bike. Undercutting is an effective modification but it requires complete disassembly of the motor and it isn't cheap.Ĭlutchless up shifting with constant mesh gearboxes, like the 07 and every other motorcycle I've owned, is easy and doesn't beatup the dogs as long as you fully unload the gears and don't rush things. This has led to some issues with race bikes generating more than stock hp the 4th to 5th upshift in particular from what I've heard. If you are comfortable with the throttle response of your bike and don't have excessive popping from exhaust, then I wouldn't worry about it and just enjoy.Ģ020 and prior gears are not undercut from Yamaha. Mine had this quirk and it would happen 3-4 times a year usually while waiting for a stop light to change or when just leaving the light. I do know early on (2015-2016) some posters complained about stalling issues with their bikes, while most never experienced this problem. Maybe some exhausts work better with a tune than others or maybe there are some minor variations between the bikes. I don't have a clue why the tune works for some and not others. The personality of the bike is still there just a little more refined. It doesn't and I wouldn't want that anyway. I'm not going to go over the top and say it feels like a whole new bike. In my case it feels like a well carbureted bike now. It reduced the engine braking to what I consider to be a reasonable amount, it also smoothed out the off/on throttle transition to a more comfortable level. I wasn't as much looking for more power as much as I was looking to smooth out the power band and the tune did exactly what I wanted. I have Akra Ti exhaust and the tune made for a solid improvement on my bike. Has anyone here had one of these apart and looked at the dogs? ![]() With undercut dogs you can be sloppier with the shifts and the gears tend to pull themselves into engagement if you don't get them all the way together. For square cut gears I like to pull in the clutch, shift cleanly, and hold the shift lever until I let the clutch back out. Eventually you can wear though a snap ring and have to disassemble the transmission to fix it, while hoping nothing else got damaged. You can get gears engaged but not quite fully that way, and put undue forces on snap rings. If we have square cut dogs, then I don't recommend clutchless shifting as a matter of habit. Photos seem to show square cut dogs, but Yamaha says the 2021 model has different angles on the dogs to make it shift smoother, which implies the 2020 and earlier version has more undercutting than the 2021. I've been trying to figure out if the transmission gear dogs are undercut on these bikes. ECU001 ECU Base Map - Postal Service - No Dyno Setup, £260.You know.We offer four types of services for the ECU Flashing: Our reliable, high quality ECU Flashing service starts from just £260. ![]() It’s also possible to unlock additional features and capabilities of the ECU – for example, Its primary purpose is to improve rideability. The benefits of ECU flashing aren’t necessarily about headline-grabbing power gains, but rather achieving a smoother, more responsive power delivery throughout the rev range. Ultimately, this program determines how your engine operates. The ECU is factory pre-programmed to manage a wide range of parameters. The item you need if adding an exhaust or changing air filters is something like a power commander which actually controls the air/fuel mixture which determines if the bike is running lean, rich or just right.Īll modern engines are controlled by a microprocessor chip the Electronic Control Unit or ECU. The ECU flash is simply to smooth out the throttle, making it less 'jerky'. Reprogramming the air and fuel ratio can help maximize power as well as thermal efficiency. T uning your ECU can also improve your air and fuel ratio, in order words, your boost, governed in the engine. This type of modification is used to modify the exhaust system, and take advantage of the increased air flow by changing the fuel table. An ECU Flash is a way of tuning a motorbike for optimal performance, by re-mapping the fuel and removing certain restrictions. ![]()
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