A 250 ninja is a high performance bike that performs better than a lot of bikes with nearly double its cc. It is banned as a learner  bike in a number of countries due to its high power/weight ratio. His bike is probably a twin carb setup with a highly tuned engine. You wont keep up with your mates bike on a 250gs.

70 is a bit slow for this bike. Mine will do better than 85 , but not much more. 85 is about tops without mods.

A cb250 will be about the same as this bike I would think. Check the oil level in your gs after the dealer serviced it, i'll bet he's over filled the oil. That will detract from your performance for starters.

As for your dealer Go to someone else.



If you have a bit of bike experience then a 250gs will not be a grand experience. But as a preferred learner, first bike it does the job well.