Total noob, 2008 Rebel 250, acceleration issues, misfiring?
*sorry for the essay, wasn't sure what was important to say*
Hello everyone, I'm new to the forum and new to riding in general. I bought a used 2008 Honda Rebel 250. Allegedly the first owner bought it, rode it and then garaged it for 8 years. She then polished it up, got it riding and sold it to a guy who rode it for 3 months with the choke on (also a noob, and wanted to use the rebel to learn to ride, he got to top speed 75 mph), but then he outgrew it and sold it to me.
I've had a lot of help working on this bike from people more motorcycle inclined/a mechanic who came by to change the tires and oil. I really don't have the means to spend any more on a diagnosis for the mechanic to come back so I'm hoping any of you fine people might be able to point me in the right direction to look in the manual or anything. Before he left, he said it might be the carburetor float (which we sent a picture to him and he said it was fine although it wasn't level). He also said it definitely wasn't the engine because he was able to rev really high.
So far since I've brought it home, the carb has been cleaned out twice (first go around something got clogged because this was before I'd changed the oil and gas... who knows how long the regular gas was sitting in there...), valves adjusted to .003mm (opened the top and the crank case to spin), oil changed, new air filter installed, new tires, new headlight, new gas (Premium), new spark plugs.
The bike idles really nicely and shifts well too. Due to the problems it's only been ridden down a side street and back a few times. The problems I'm seeing now:
-Anytime I roll the throttle (in gear or neutral), it misfires a little bit out of the exhaust. But this has decreased a lot since I've tuned the carb fuel screw and idle adjust (the black knob). Still does it a little though...
-It won't accelerate past 42 mph, even in a slight decline street full-throttle, 4th gear
-Before any work was done, when I slowly let the clutch out there was more power than there is now. Now, I have to give it some throttle to get up the driveway when before I could start from a stop at the sidewalk and just let the clutch out a little to get up the driveway. That might go along with the speed being so slow.
That's basically all the information I have right now... any help would be MUCH appreciated! Hopefully it's not a lost cause...