What is an average fuel economy to expect from an MC22? Trying to factor in how much budget I should be allocating for fuel costs on this bike. I don't mind tuning the carbs to get better economy (no experience doing this). My experience has mostly been on scooters and very small bikes (125cc or under), so this isn't a concern i've had to worry about before. I've seen rather varying numbers from 40 to 19 kmpl online.
4L/100KM is achievable if the bike is tuned well. It will vary on factors like what condition the carbs are in, what fuel is used etc. But as far as mechanically, how well the carbs are balanced will make the biggest difference. Setting the pilot mixtures will also help, and adjusting the needle clip position if necessary for some reason. Some quirks will matter as well, like the ridiculous valve overlap on the ZXR250 won't help, but the FZR250 has an EXUP which does help, and so on. If the bike is standard, then use standard settings, if there's problem with how it runs under those conditions then there is a fault somewhere that needs attention.
The biggest factor with fuel consumption is you. If you ride hard and fast then fuel consumption will be lower. The little 4 cylinder bikes are not the most fuel efficient. They are sports bikes. I typically expect to get about 250km out of a tank for my riding on my mc22. Which is not that far different from what I get from my other bikes as well. Do not plan on doing endurance runs. Your bum, wrists and back will get sore anyway. Just enjoy. Peter.
Nope. No mods that I would recommend. Just look after it and keep it in good tune and regularly serviced. Ride and enjoy. If you are after an extremely economical bike, then the mc22 is probably not your first choice. If you want lots of fun, then you can not go past the little screaming 4s. Peter.