Plenty of more knowledge from people who actually tests this shit online on forums, give it a read before you use that smart brain of yours. That is why it is recommended to flash the ECU, to have the fuel maps and preferably ignition timings adjusted so that the ECU can easily stay within the desired fuel / air ratio for optimal performance. The ECU can only compensate a little if the fuel / air ratio is out of "spec" based on the fuel map, but not a lot. When above 4000 rpms or at acceleration, the bike mainly follows the fuel maps inside the ECU. The MT 07 has a closed loop fuel mapping, meaning while it is below 4000 rpms or at a cruising steady rpm, the ECU reads the O2 sensor and adjusts the fueling according to the values from the sensor. The main thing to take away is that lean running means HOTTER running and hotter running wears internal components quicker and therefore can cause an engine failure sooner than expected.
The bike will just run less smooth and possibly lose some power at some rpm. I reinstalled the ECU and was very pleased it no longer backfires and the sever deceleration (from the factory fuel mapping) is gone. I shipped my ECU off on a Friday and received my ECU it back the following Saturday.
#Fz 07 ecu flash worth it full#
In fact, I ran my bike with a full system and no tune for 10000 kilometers, never had an issue. Had my 2017 Yamaha FZ-07 ECU remapped to address the factory deceleration fuel cutoff and for exhaust/intake upgrades. Now running lean is totally fine, not a problem for a long time, if ever. This creates a higher fuel / air ratio than what it was at stock and that makes it run lean. Remove the stock exhaust to add a full system, the bike breaths better while still getting the same amount of fuel. The fueling has therefore been affected by these emission values which means the bike is running on percise fuel / air ratio making it extremely prone to lean running at certain rpm (considering the variables such as air temp, elevation, country you're in.). That brings us to the MT 07, which came out at 2014 (15 for US) and as a year, it's still a pretty new motorcycle today.
Over the years, manufacturers have been limited with emission values and therefore they constantly have to tweak the fueling on newer bikes to suit it with the emissions while having safe engine performance and promised power. Removing the snorkel does nothing with the stock filter but is worth removing if you go the higher airflow filters which you can get small gains out of.Īs you know, fuel injected motorcycles have fuel maps within the ECU and the fuel is delivered in correlation with air at a given rpm. The bike will be perfectly fine with the stock thermo fan temp range but it's up to you how much you trust Yamaha's Engineers. Me personally wouldn't bother unless you plan on going further or you want specificchanges such quickshifter, launch control, decel fuel to reduce engine braking and the thermo fan activation temps. Pops on decel is a lean condition created by the hard fuel cut the MT-07 has on deceleration which is the same that causes it too have so much engine braking.
You won't see much of a power gain but you'll gain a nicer power curve in small parts and depending on who does it the fuel map should help with how smooth it is overall. As someone that Tunes bikes let's start off with the FZ-07 or MT-07 fuel map is rich from the bottom of the map until the last 10% then it leans out but nothing too drastic.
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