RECENTLY PURCHASED A 97 600 VENTURE SMART CARB AND IT RUNS POORLY (MISSING AND BACK-FIRING) AT RPMS OF LESS THAN 5000. I SEE THE MAINS WERE JETTED DOWN TO 156.3 (I THINK) AND PILOTS ARE NOW #60. ANYBODY WITH SOME EXPERIENCE WITH THIS SLED AND SOME ADVICE?
Trails are temp closed right now. I ran with both sols. plugged in because I wasn't confident about any harm that would cause. I believe they cut fuel to the carb as soon as the engine is shut off so I dont think I can do any harm. Plugged in the sled ran fine right up to 8000 rpm. Unplugged the sled seemed to pick up off idle quicker but wasn't much of a difference. Once the trails reopen I will experiment.[/b]
After a lot of time trying different things, I bought the factory service manual. pulled the carbs for the forteenth time. after testing sensors, one by one as per factory manual states. found the test for the throttle position sensor, found flat spot in the sensor changed the sensor and no difference in performance. bought a used harness and control units from ebay changed the cdi box and control unit , no change. swapped out a set of carbs from my 500 vmax and sled ran quite well.(other than still had a slight burble from idle to about 5000 rpms or so)bought a set of carbs off ebay, did a quicky clean slapped em on and ? better sometimes. ditched that problem, played around cause I thought my battery was dying. swapped the battery out and while I was turning over the engine I bumped the ground cable on the engine side and the sled quit running. wiggled the ground cable and the ground cable engine side snapped off. replaced the ground cable . reinstalled the original carbs all electronics plugged in set all back to factory and runs pretty good.(better than it ever has). starts and runs ok, 5500 rpms and up smooth as silk. off idle until 5300 still has a burble. with mustard put to the thottle the sled runs perfect, but still with easy throttle getiing a spot where she is not so smooth. all electronics test as per factory manual, although the test for the barometric pressure sensor is very poor at best. so I dont know if that could be a little out of whack or not. everything else testing perfect even pulled the solinoids out of the carbs hooked them up to a battery and wiggle the harness to make sure I didnt have and intermitten or loose connection to the solinoids. playing around with pilot jet settings now went out up to one full turn more than factory with little change in performance, will try leaning it out now
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