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Old 11-15-2015, 12:48 AM   #1
crdude
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Default Iqrr build

no set plan for this sled, but here it goes.

As I bought it- 08 iqrr. Basically a race sled, but came from the factory with a larger fuel tank, oil injection, PERC, 600HO engine and slightly softer suspensions and a extra heat exchanger.

Pretty much stock other then C&A skis (which will be going away, can't stand the color) and a dynoport pipe and can and a 121x2" track.






Looking forward to working on this when I get back from work, so far iv picked up stock IQR skis, new bars, and to do away with the old school (05-08) goofy iqr front suspension I picked up HRP spindles and ordered zbroz 43" high clearance a arms.

Last edited by crdude; 11-15-2015 at 01:05 AM.
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Old 12-02-2015, 10:10 PM   #2
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Default Re: Iqrr build

Been running in circles trying to figure out why this sled won't pull full Rpm's lately.

Anyways, front ends ready to go on the sled.

These new a arms are great looking. Welds are 10x better then any factory weld Iv seen come from Polaris. If I ever bend a arms on the pro I'll be ordering a set of these for it.

Last edited by crdude; 12-02-2015 at 10:13 PM.
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Old 12-02-2015, 11:36 PM   #3
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Default Re: Iqrr build

How's the clutching? Have you messed with it at all? Weights change a lot, ramp angle will help with how hard it engagauges.
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Old 12-02-2015, 11:38 PM   #4
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Default Re: Iqrr build

Those are the same brand arms I have on my rzr 1k..... Very beefy
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Old 12-03-2015, 08:19 AM   #5
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Default Re: Iqrr build

Don't think it is clutch related. Only pulls 8k even without belt (yes, I know it's a bad idea to run a sled without a belt..)

Been threw carbs, clean. 410 mains should be good with the pipe. cleaned ves blades bellows are good and I have brand new springs in them, comps good top ends fresh. New plugs. Reeds look brand new.
I'm thinking possibly timing issue or crank is out of phase.

Yes zbroz is a quality product, much cheaper then OEM. Much lighter as well.

Last edited by crdude; 12-03-2015 at 08:21 AM.
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Old 12-03-2015, 05:08 PM   #6
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Default Re: Iqrr build

I know you said you tried it without a belt but I'd check the belt deflection.
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Old 12-03-2015, 08:47 PM   #7
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Default Re: Iqrr build

If it's pulling 8k I would say you are real close. I'm not sure what the IQR is supposed to run at but all the two strokes I have played with tend to go down on the HP curv after 8200-8400. I have picked up a few R's just by replacing primary springs. Same spring just a new one. It's like they can just get a little worn out. Good luck
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Old 12-04-2015, 12:14 AM   #8
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Default Re: Iqrr build

Crank halfs are out of phase.

Will be doing a full bottom/top end rebuild next time home. Figure I better do it right the first time so I can be confident it will hold together!


I can already tell I'm going to have way to much $ in this sled when I'm done... probably would be better off parting this out and buying a newer pro r, but I love this chassis.

Last edited by crdude; 12-04-2015 at 12:19 AM.
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Old 12-04-2015, 01:03 PM   #9
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Default Re: Iqrr build

Would think that the crank could only go together one way. It's pressed together right?
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Old 12-05-2015, 08:30 AM   #10
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Default Re: Iqrr build

Pressed together is correct. Not key'd or welded from factory though. Likely thrown out of phase when it blew up. Or maybe they water skipped it, sunk it and hydrolocked the engine? No way of knowing.
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