Please can some one tell me if I have a major problem with my 2008 - ZS250GS. I brought the bike second hand a week ago. It has only done 1600 miles from new and looks new. It's a great looking bike, but has no go. A friend has a 250 Ninja and I cant get close to his 0 - 60, he's doing 60 when im at 30. Also he hits 100 MPH and I barley hit 70. The bike starts and runs ok. I took it to motorcycle dealer and he was recluctant to touch it, but did clean carb and change plug, oil and check it over. He said it was running ok and that the bhp was 18, and that about the lot for this engine. Has he missed anything, has anybody else had the same issue. I used to have an old CB250 superdream, that was quicker. Many Thanks