2001 Summit 700 Motor is FLAT

[atvtrailrider]

I have a 2001 Summit 700. It is about 3000 miles on it. It has not been ridden much the last couple years. So I got it out and started it up and it would not idle down below about 3000 rpm. Found cracks in the intake boots so used some rubber/plastic stuff and coated the carb boots. Put the carbs back, some new plugs, and and now it idles down to about 1800 rpm. The motor seems to rev and sound good at home.

Took for its first ride this weekend. The sled is very flat you can ride around slow just fine but then it seems like the motor just flattens out and is kinda dead. Our old Arctic Cat 500 was faster. It doesn't seem like it is lean or is misfiring but just very flat.

So where should I start?

And as a side note how many miles before you usually have to put new pistons in these?

Thanks Much

 

[xpdfcwut]

When was the last time the clutches were cleaned? The clutches not shifting out may make the motor feel flat. Mine had the helix sticking and was like being stuck in first gear.

 

[onlyrotax]

If a sled has been sitting that long I would not run it without at least dropping the fuel bowls and checking the mains and pilots for blockage.

 

[Motley Doo]

check compression along with what was previously stated....she could just need to be run! Get the old fuel out of the lines and put a few heat cycles through it.

 

[atvtrailrider]

I don't know when the last time the clutches were cleaned, sounds like that needs done.

I cleaned the carb bowls out and the main jets. I guess I wasn't sure where the pilots were so didn't take them out.

I ran about 1/2 to 2/3 tank through it but it was still doing it when we shut it off for the day.

 

[mgeary07]

When was the last time the clutches were cleaned? The clutches not shifting out may make the motor feel flat. Mine had the helix sticking and was like being stuck in first gear.

What all entales cleaning the clutches? Any advice for this?

Thanks

 

[bcflyfisher]

Sounds like your idle issue was very similair to mine. Carb boots leaking. You might be very surprised how easy it is for those things to leak. The result is a too lean condition and if you run it , you could melt your pistons. This happened to my nieghbor twice.

Do yourself a favour and do a compression test. Hot and cold. If the difference in pressure is greater than 5 psi and if the cylinders are not even, you may need new pistons. There are lots of threads on this board on this subject.

You may also want to do a low pressure test to see if you have leaks and where they are. Involves taking exhaust . carbs off. plugging holes with plumbing fittings, plugging oil impulse line and pumping up combustion chamber with air up to 5psi and seeing if it holds for 5 minutes. Check for leaks with a spray bottle of soapy water. This is explained in the shop manual and if you search this board . there is a good thread on how to do this fairly cheaply.

Patching leaky boots is a bad idea. You will have a ticking time bomb and eventually you will cease your engine.

 

[bcflyfisher]

BTW. you usually need new pistons around 3000 miles.

DO a compression test.