I recently picked up a 95 xlt 600 triple, cleaned carbs and got her running pretty good. My only problem is it has sort of a flat spot in the mid range. If you pin it it will jump up to around 8k but then it drops down to about 6800 and stays there until you get above 50 mph or so, then she opens back up and runs around 8k again. It has a dg can but thats it for aftermarket parts. Im womdering if this is a jetting problem or a clutching problem. I dont know if it has stock jets or if theyve been changed. Im leaning towards clutching. When its in deep snow it has a real hard time opening up, on the trail it hesitates for a second or two then opens up and rips. Thanks in advance
Kcendels9501
If it has a can and the jetting wasn't changed that will cause issues as well. DG exhaust stuff isn't exactly the greatest stuff in the world. With the clutching idk how many miles are on the sled but over time in the secondary you need to replace the secondary buttons every 1500-2000 miles along with the springs as well sometimes both primary and secondary. I would clean the primary as best you can, take apart the secondary replace the buttons if it needs it along with clean up the secondary helix and go from there. And if anything maybe find a stock can for it and when you install it take apart the carbs and make sure they are at stock settings. Polaris browse is your friend! Also I will link the service manual as well. Click Polaris and scroll to 1985-1995 Polaris Service manual.
app.box.com
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app.box.com
Thanks, the sled has about 6k on it. Im gonna take apart the carbs again and check to see what kind of jetting its got, ill borrow a stock can just to see if that helps or not. Im gonna do a compression check as well just for piece of mind to know the motor is good. If stock jetting and stock exhaust doesnt do it ill dig into clutching.
So if im correct the main jet is supposed to be a 210 correct? I had 200s in which seemed odd, should of had larger jets with an aftermarket can.
The can won't change performance as much as an aftermarket exhaust would. The can usually doesn't substantially increase airflow through the engine, which would be the reason to increase jet size. What elevation are you riding? The 200 jet would be appropriate for 0-3000 elevation and +10 to +40 f or 3000-6000 feet elevation and -20f to +10 f temps.
Polaris jetting is pretty rich from the factory, often being a whole jet size on the rich side. Rich jetting prevents warranty repairs
To make sure you are safe, check the plugs and piston wash. Plugs should be cardboard brown, whiter would indicate lean, blacker would indicate rich. Piston wash is a small "washed" area where the transfer ports flow gas/air into the cylinder across the piston crown. The washed area should be about the size of your thumbnail. No wash means too lean, bigger wash means too rich.
Polaris jetting is pretty rich from the factory, often being a whole jet size on the rich side. Rich jetting prevents warranty repairs
To make sure you are safe, check the plugs and piston wash. Plugs should be cardboard brown, whiter would indicate lean, blacker would indicate rich. Piston wash is a small "washed" area where the transfer ports flow gas/air into the cylinder across the piston crown. The washed area should be about the size of your thumbnail. No wash means too lean, bigger wash means too rich.-
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