250r update and mods, any other suggestions

DannoXYZ said:

here's some article on Ari's bike. They managed to shave off 60-lbs!

https://www.motorcyclistonline.com/how-to/2011-honda-cbr250r-doin-time-4/
https://werkstattsf.wordpress.com/2013/07/15/race-report-thunderhill-raceway-willows-ca/

He's 3-4s faster than me on Ninja 250 @ Thunderhill. Wished I started racing earlier, could've learned lots from him! He went on to RC390 and set track-record @ Sears Point Sonoma couple years ago. Until Rocco...

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One of the motorcycle engines used is a cbr250r in a grom. I love this guys channel.

This tech is probably the way to go in 2021...or maybe a speeduino. There is more power available with intake, exhaust and ECU. But it's over priced IMO once you add the cost of a powercommander, and speedohealer.

DannoXYZ said:

Yeah, I'm big fan of tuning with EFI. Good comparison is U.S. Ninja 250 with carbs vs. EU version of same years with EFI. Using Woolich software to fine-tune EFI to optimise same mods: full exhaust, free-flow intake, EFI gets +12bhp vs. carbs +7bhp.

Any time it's possible, better to reprogram factory maps in ECU rather than using
piggyback.

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I would guess that microsquirt/speeduino would be far better than factory ecu remapping, unless you have a ton of free dyno time. Only a full replacement ECU with data logging would let you use a wideband O2. Also could use multiple maps for different riding conditions or fuels. Plus the open source ones all support a quickshifter, or launch control which really seems like fun.

Love the Zach and Ari content, had no idea this show existed.

Great video. I learned that at full throttle you're running open loop on a bike, so the wideband O2 sensor isn't going to be as useful as on a car.