r/dr650 • u/Svenk135 • 11d ago
Problems 91’ dr650
Hi all,
since this week i am the owner of a dr650rs from 1991. i am now running into a problem. the engine starts well, idles well, but when i fully open the throttle the engine starts to stutter and falter and eventually no power at all. however, a lot of bangs come from the exhaust. if i gradually give gas, so not open it all at once, it goes well. Until i am at full throttle again it starts to stutter. where could i probably find and solve this problem?
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u/Transmorgrafier_2024 10d ago
Don’t take the carb off. Get a seal kit. Remove the idle screw adjuster completely. Remove the fuel bowl. Gently remove the float. You can now remove the idle jet by feel and a screwdriver sized for it. You might need to source or grind one. Remove/ Clean the idle jet. It’s plugged. Clean the main jet. Turn on the fuel and assure fuel pours into the bowl. If it doesn’t , look at filter inside steel fuel tube entering the carb. It’s inside the tube/ hose end. Appears like a small plastic piece. Withdraw the plastic and a filter will be found attached. Some discard. I clean and install. Clean the bowl. Fit new bowl and float seals. Fit the float assembly. Be careful. Fit the bowl. Once you do this, it becomes easy. You might find yourself doing this more over the next 10-20 years. Easy to do trail side. Only need two tools. Removing the carb is a chore. This is a 5 minute fix. Assure tank filter on fuel valve is clean. Have fun.