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  #1 (permalink)  
Old 04-26-2010, 09:19 PM
Weekend Warrior
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Default DS650 Starting Carb Problems

I am on the home stretch of being able to ride my DS. The final problem I have I think is with the carb. Symptoms: There is a lot of gas stains below the carb. Bike will run decently on carb cleaner. Bike will start on its own IF the choke is fully on then die right away. No idle. I have cleaned the whole carb twice, and pulled the jets out and sprayed them off. Can someone please tell me which is the Pilot Jet from the Pic below? I am open to suggestions.

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Old 04-26-2010, 09:42 PM
OMR OMR is offline
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#3 is the pilot jet.
Remove the pilot jet and the pilot screw.
Be careful when taken out the pilot screw, to not lose the spring and washer.
Blow in alittle carb cleaner into both, let set 3 minutes.
With a rubber tipped air nozzle, blow out both passages.(Need compressor)
reinstall and set pilot screw to 3 1/2 turns out, if stock.

OMR
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Old 04-26-2010, 09:54 PM
Weekend Warrior
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Thanks for assisting. The bike is not stock, It has a FMH slip on exhaust. It has K&N airfilter and no lid on the box. The Jets are: #2 says 45 on it. #4 says 190 (is that too much?). I ride at 4000-5000 feet. #3 is a long skinny bumpy one that has a 40 on it. Now I am panicking because I didnt find a washer or spring. The #1 mix screw was at two and a half full revolutions out.
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Old 04-26-2010, 10:05 PM
OMR OMR is offline
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Is Oldmanracing! Also the inventor on the DS650 carb Mod!
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Sometimes the spring and washer are stuck.
I would spray carb cleaner and reinstall pilot screw.
Leave pilot screw turned out 6 turns and blow air through the pilot jet hole.
Reinstall pilot jet, because you only have a #40 pilot jet turn pilot screw out 3 3/4 turns.
#2 is the starter jet.
Is the 190 a mikuni or DJ main?
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Old 05-28-2010, 12:24 PM
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Thumbs up Solved

Ok, my bike is finally running! My problem was the intake gasket on the manifold. I had noticed that the previous owner didn't put the floppy air tube on correctly and it must have been applying downward pressure on the intake rubber (motor side of the carb). It was a hard to see crack right where it changes size. Air was leaking in and it would not idle. Now I can start playing with the jets and sizes! (I think the 190 is Mikuni. It looks like an M stamp.)

Thanks OMR for your help.
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Old 05-28-2010, 12:24 PM
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Tags
2000, 650, bombardier, carb, carburetor, clean, ds, ds650, jet, mixing, pilot, problems, running, scew, turn



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