hehe Yah... my first thought was it wasn't running on both cylinders !
if that happens it is slow on acceleration ...really slow, and top speed is around 50mph ! the odd thing is it doesn't sound like it's running only on 1 cylinder
until you hear it running on 2 cylinders !!!!! there is no comparison but if you've never heard it running on 2 you wouldn't know ! one of the disadvantages of buying a used bike ! You don't know !
....
when I first got my 250R running it sounded ok to me but it wasn't running right ...and I knew that... but I took it for a short ride around the block anyway
and when I shifted into 3rd gear the 2nd cylinder kicked in and it took off like a rocket ! then I could tell the thing was running on 1 cylinder near idle....
...3 attempts at carb cleaning later and I finally got it to run fairly decent.
they are the most difficult carbs to clean I have ever came across !
.... this little bike is a rocket ! it goes like a 650 of my youth used to ! don't let the 250cc size fool you it's a big bike in a small package ! and it WILL get you into trouble !
....Ride safe !
Bob........