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Old gas in Sportsman EFI

I've looked everywhere and can't find a proper answer for this.

I stored my 2009 Sportsman 500 HO EFI for 2 years with gas in it. Most likely ethanol gas. It ran fine before storing. When I first started it up again, I just got a clicking sound. So I changed the battery. That sort of worked. The engine now cranks. But it won't fire up. I'm planning on picking up a new spark plug in case the old one is shot.

Here's my dilemma. How do I get the old gas out? I'm quite sure it's the cause of the engine not firing up. With a carb engine, I know you can just disconnect the carb and drain it. Is there such a thing with fuel injection? Can I drain the fuel somewhere?

If I remove the gas tank and flip it upside down, is that enough to get rid of the old gas or do I need to flush out the EFI also? If so, how do I flush out the EFI?

Do you think I need to replace the fuel pump?

Thanks in advance.
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Interchangeable parts Polaris sportsman

Hello everyone, I’m new here and just picked up a 1999 sportsman 335 as a project bike. I do need a few parts for this bike and was wondering if parts like axles, front hubs, clutch cover, brake parts are the same on the 1999 335 and a 2001 sportsman 500. I can buy pretty much a whole bike except for complete engine for s good price, but I don’t want to buy it if the parts won’t fit. Any help would be greatly appreciated.
Thanks
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voltage regulator

just wondering if anyone knows where the connector for the voltage regualtor is located on a polaris scrambler 1000 xp
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Flash ecu

Ok. So I want to flash my ecu. I would like to get rid of limiters and add performance. Anybody reflashed their renegade? Who flashed it? What were the results and were you happy.
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Knocking noise and shifting question

I recently bought a new 2018. Sportsman 450 (has 16 hours on it now). I went out and started it today to keep the battery up and when it started it had a knocking noise. I gave it a little light throttle and it immediately went away. It had never done this before and has not done it again. What does everyone think that could have been. Of course it's under warranty, but I was just curious and didn't want to ride it and mess anything up.

Also, I wanted to ask if it is ok to shift from low to high while riding or moving. I felt that I should not shift from high to low, but didn't know if you could shift from low to high. I am new to atvs and have been coming to a complete stop to do ANY shifting. Thanks much everyone.
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2014 xmr maverick suspension

I just picked up a Can am maverick xmr with the infamous air ride suspension.

Found an air leak in the feed hose into the compressor. Assuming the compressor is fried. Tried to run 12v to the compressor to see if it would turn on (compressor will never boot up)

Looking for a new compressor or deleting the system.

Or add the valves and manually fill?

What are the best suspension options to swap out the air ride? Anyone selling?

Looking for good ride height to avoid rocks and stumps.

Any help would be greatly appreciated!
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Active Descent Control capability

I'm looking at purchasing a 2018 Polaris Sportsman 850 SP, which weighs app. 800 lbs. My property is very hilly, so the Active Descent Control is of particular interest. I tow a 500 lb brush mower around my property. The 850 SP has an Unbraked Trailer Towing Capacity of 1914 lbs, according to the owner's manual. Will the Active Descent Control be adequate, on relatively steep hills, to control the machine and a 500lb mower being towed behind it? Or should I be looking at something like the Polaris Ranger, for the additional weight it has?

I'm currently towing the brush mower with a Suzuki King Quad 500Axi, which simply has braking power (no engine braking) to control downhills, and I've had some scary trips as the brush mower began 'pushing' the machine down the hill.

All help appreciated! I *really* don't want to buy a $10k machine that doesn’t do the onme thing I most want to do with it!

Thanks!
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Rear passenger seat

I don’t like to assume things in life but I’m going to assume that there has to be such an accessory for the 570. I see plenty of rear passenger seat/cargo boxes combinations for atvs with standard racks but where can I find a nice passenger seat that will fit on my Sportsman 570? I just want my son to be able to go out and explore trails with me from time to time.