There are two 10mm bolts- one for each haft just above the horn.
The two hafts have a snap on top that holds them to-gather.
take out the two bolts holding them on in the front. Pull them off slow then they come apart on the top.
It will be easier if you slide the tank back (or remove it completely)
check the carberauter
Remove the 10mm bolt from behing the rear seat. Then pull the rear seat it hooks to the front seat in the front. Remove the bracket there and pull the front.
Go to www.650ccnd.com you'll find a rejet and adjustment there.
You might have a bad battery they arent very expensive
The oil dipstick on a Yamaha Vstar 650 motorcycle is typically located on the right side of the bike, near the engine. It is usually a long, slender metal rod with a handle on top for easy removal and checking of the oil level. To access the dipstick, you may need to remove any covers or panels that are blocking it. Be sure to consult the owner's manual for specific instructions on locating and checking the oil dipstick on your Vstar 650.
The Yamaha VStar 250 has about 21 horsepower. The Honda Rebel has about 17.
You will need to remove the top chrome rear cover from the rear cyl on the right side. and same on front on the just on the left. they are under these covers. Pull straight out on them.
Heres a UTUBE on it http://www.youtube.com/watch?v=bQ7nyMRnBIM
93 mph on my 2002 v star Yamaha custom
To remove the choke cable from a 2000 Yamaha V-Star 650, first, ensure the motorcycle is turned off and cool. Locate the choke cable at the carburetors, then disconnect the cable from the choke mechanism by loosening the retaining nut or screw. Next, follow the cable to the handlebar, remove any clips or brackets securing it, and gently pull it out from the handlebars. Finally, the cable can be completely detached from the motorcycle.
Floats on Yamaha 660 how you fix
under the gas tank