1991 indy classic carb settings

plumcrazycuda5 · Dec 14, 2012

Hello im trying to help my neighbour out with his sled. It is a 91 indy classic 500, for the most part it runs good but has a bit of a bog after letting up on the throttle. When trying to pick up speed he sometimes has to feather the throttle until it goes. Doesnt do it all the time and sometimes worse then others. Was just wondering if anyone knows the carb specs for this sled? Pilots, mains, mixture screw settings? Thank you

OLE 11 · Dec 14, 2012

Pilot jet might be plugged! Take carbs apart, Remove main jet,needle jet,pilot jet clean with carb medic, Blow all ports with air! clean holes on pilot with small peice of wire! Set air screw 1-1/4 to 1-1/2 or till it idles the best. 80 mph!

duck · Dec 14, 2012

I would start with the clutch's.....sounds like the secondary is sticking and not pushing the belt up. Its like your in 4th gear after letting off the throttle and the thing has a hard time getting going. Could be a sagged spring in the secondary or primary. Take the secondary apart and clean it and make sure the pre-load is correct.

plumcrazycuda5 · Dec 14, 2012

Right on! Thanks, thats what i was thinking. He said he cleaned them but his cleaning is pulling the bowl off and blowing a bit of air in the jets. Lol, i will pull them off and give them a good cleaning. This sled is in awesome shape, looks new other then one rip in the seat. He picked up 4 sleds for $1000! 91 indy classic, 94 vmax 600 long track, 84 enticer and a 84 yamaha 440, all run and in nice shape. Lucky guy, already sold the enticer for $800, the v max looks brand new also.

plumcrazycuda5 · Dec 14, 2012

Thank you, for some reason i didnt even think of the clutch but that makes sense because it is not consistent at all. Sometimes it doesnt do it at all and other times its really bad. Thank you again.

papajake · Dec 14, 2012

try dropping the needle 1 some times they run rich on take off

Whitetiger · Dec 15, 2012

From Polaris manual:
Main Jet: 280
Pilot Jet: 40
Air Screw: 1 turn out
Jet Needle/clip position:6F9-3
Valve seat 1.5mm
Idle rpm: 1900 +/- 200

If your engine is a EC50PL-01 or -02 ***** EC50PL-04 or -05
Jet Needle # Q-0 (247) ***** P-8 (247)
Throttle cutaway: 3.0 ***** 2.5

duck · Dec 15, 2012

Whitetiger said:
From Polaris manual:
Main Jet: 280
Pilot Jet: 40
Air Screw: 1 turn out
Jet Needle/clip position:6F9-3
Valve seat 1.5mm
Idle rpm: 1900 +/- 200

If your engine is a EC50PL-01 or -02 ***** EC50PL-04 or -05
Jet Needle # Q-0 (247) ***** P-8 (247)
Throttle cutaway: 3.0 ***** 2.5

6F9-3 means the E clip is in the 3rd notch which will be the middle position. All the 500's I had, the clip worked best in the center except at higher elevations where sometimes you would drop a notch.....

plumcrazycuda5 · Dec 19, 2012

Awesome thanks, we got the issue solved, the pilot jets needed a good cleaning and mixture screws were 1/2 turn out too much. Thanks

1991 indy classic carb settings

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