Won't accelerate / looses power when I roll on throttle
I just got a 2004 rebel 250. I took it out for my first ride and for the first ten minutes rode great. Then all of a sudden it started chugging away but kept it's speed. Soon after that, though, it started loosing speed as I would roll on the throttle. I would be in second gear and couldn't even get past 20ish mph before it was start to slow back down. Any ideas?
Welcome to the forum. Sounds like either bad gas, or more likely, some crud got into the carb. More than 90% of the time, engine running issues with previously owned bikes are due to gas left in the carb during storage. Check the tank for rust, and clean if needed. Also, install an inline fuel filter so any contaminants don't reach the carb. Finally, clean the carb.
Look in the Wrenching section of the forum. There are "how tos" for all the above stickied there.
Keepin' all the left over parts. Gonna use 'em to build another bike!
everything flite mentioned, you might preform a quick check of the settlement bowl screwed into bottom of fuel tank petcock..
turn petcock off, use wrench to unscrew #7 bowl, see how much crud is in the bottom..
there may or may not be a screen #6, it doesn't replace a good in line filter owners should attach to #19 fuel line..
The in tank screen #4 should be checked when tank is empty or if tank is off bike and tilted..
By assuring upstream fuel supply is clean and flowing properly, any work on carburetor is not in vain..