PLau
Well-known member
both the ktm390 and yamaha R3 have had engine issues, ditto for the earlier honda CBR300. The kawasaki ninja 300 is the reliability king of the 300's. imo
Have had a 99% stock Ninja 300 for about 25k kms now and haven't run into any issues except a broken fork seal a few months ago, but that's the least of your worries when looking at the overall reliability of a bike.