Hey guys, got a problem here. I have a '97 Indy 500 SKS liquid. She ran the Iron Dog Pro Class in '97 & I picked it up for a song. It ran beautifully until about 2000, when it began bogging on low end. Keep the RPMs up and there was no stopping it. Higher Temperature and higher altitude would make it bog much worse, to the point where I simply had to turn around on a few trips and head back. I finally blew a piston in it at 12,000 miles, due to a crack in the carb boot. I bored it out .020 over & had both clutches rebuilt by a buncha knuckleheads at the local Polaris shop - I've had bad experiences there and I suspect that the clutches didn't have everything done to them that I paid for.
The track was toast as well, so I put a 1.75" paddle on it, and had to drop the drivers on the axle from 9-lug to 8-lugs.
I figured my bogging problems were over - NOPE! It bogs just as bad. Here's the funny thing - at 15 degrees, she runs like a top, plenty of power, no complaints. At 30 degrees, it's the biggest dog you've ever seen, to the point that I have to get off it and push it to get it going. When it's having it's normal bog-fest, I have to "feather" the throttle & let it catch up to itself, and you can feel / hear the engine ready, and THEN if I nail it, she takes off like it did when it was new. Top end power is all it has; any low end power disappears after it gets up to operating temp. Unless it's 15 degrees or colder, then it runs great.
I only run premium fuel in it, I know the gas isn't the problem. The clutch engages at 3,000, and it idles at about 1,000 until it warms up and then it gets lower and lower until it won't idle anymore. Temperature seems to be the key here...??
I've been beating my head against the wall trying to figure this one out, to no avail. Anyone got any ideas?
Thanks in advance!
The track was toast as well, so I put a 1.75" paddle on it, and had to drop the drivers on the axle from 9-lug to 8-lugs.
I figured my bogging problems were over - NOPE! It bogs just as bad. Here's the funny thing - at 15 degrees, she runs like a top, plenty of power, no complaints. At 30 degrees, it's the biggest dog you've ever seen, to the point that I have to get off it and push it to get it going. When it's having it's normal bog-fest, I have to "feather" the throttle & let it catch up to itself, and you can feel / hear the engine ready, and THEN if I nail it, she takes off like it did when it was new. Top end power is all it has; any low end power disappears after it gets up to operating temp. Unless it's 15 degrees or colder, then it runs great.
I only run premium fuel in it, I know the gas isn't the problem. The clutch engages at 3,000, and it idles at about 1,000 until it warms up and then it gets lower and lower until it won't idle anymore. Temperature seems to be the key here...??
I've been beating my head against the wall trying to figure this one out, to no avail. Anyone got any ideas?
Thanks in advance!