Bike stops accelerating in 4th gear and slows down sometimes

SOURCE: Suzuki intruder 1500 charging system

You need to buy a volt meter and set it on 10, or 20 v-. Start the bike and see what it says. A good charging system will show 13-14+ volts. If the meter says 11-12 volts or does not change, you have a bad stator, or rect/reg. Take to a shop to have it further tested. Chaz Moto DC

SOURCE: how much fork oil in suzuki vl 125 intruder forks

from the service manual pour oil in until 88ml from the top, but make sure form is fully compressed before doing so

regards

SOURCE: Motorcycle won't shift gears

try intruderalert.com they have plenty of fixes for this ,could just need grease on the gear selector cam try this befor the big strip down..

SOURCE: 1992 Suzuki Intruder Clutch problem

THE CLUTCH PLATES COULD BE WORN ALSO THERE ARE ADJUSTMENTS BY THE CLUTCH LEVER TURN IT COUNTER CLOCK WISE TO TAKE SLACK OUT OF THE CLUTCH CABLE

SOURCE: how to change the oil and filter on suzuki classic

Get a filter wrench at walmart (plastic) or Auto zone type place, unscrew drain plug and after all is drained then take off filter. It works bette if you warm up the bike first so the oil is warm and flows better. The oil fill and dip stick is behind the rear chrome cover on the right side. Two allen screws to remove the cover. Check for no leaks by running her after you fill up with oil.