[XCR 700]

HELP, My 1996 RXL has developed a bog that only occures when you get on it hard. Once the machine is rolling over say 25 - 30 you dont notice it, but from idel or just crawling around forget it, this thing wont move. It runs great on the trails and has good top end. I do all the maintance every year by the book and usually replace that battery every year just to be on the safe side. Any thoughts? Someone said TPS sensor maybe??? Anyway to check at home? I hate to take it to the dealer for some bolt on part if I can fix it myself. Thanks

XCR 700

 

[michahicks]

My best guess would be too much belt deflection. Check
it. Even if you think it's OK, try tightening it a little using the adjustment on the secondary and see if the problem doesn't improve. This quess would assume that you aren't trying to get by with an undersized (worn out) belt. In short, don't try it. It's not worth it. Buddy of mine rode a Skidoo half of last season with the same problem. Got tired of listening to him whine about it saying the belt was fine and adjusted it myself. Much to his amazement all his missing performance reappeared. Imagine that. RXL w/XTRA-12 one of my favorite all around sleds. Hope you are enjoying it.
AL

 

[XCR 700]

That was my first thought so I went through both clutchs bought 3 new belts, Polaris belt quality control SUCKS! - every one was slightly different in either length or width!!!, and replaced the sliders with hyperfax jobs before I figured out it will bog even with the belt off!!! If you try to nail it under 4000RPM gou will get a serious delay then instant RPM. Someone had suggested a bad TPS or a TPS that needs to be adjusted, but I guess that you need a very expensive meter that only Polaris sells, I dont even know if they still sell as they havent offered an EFI sled in quite a while. Its been a great sled, super comfortable, pretty good trail handleing once you get used to the high center of gravity. Thanks for the reply.

XCR 700

 

[michahicks]

Has the problem just come up recently or has it been doing this since you've had it? Have you adjusted your carbs to make sure they are all pulling the same load at idle? If you are absolutely sure it's not a belt deflection issue, have you considered VERY carefully marking the position of the TPS and moving it a hair one way or the other to see if the condition changes? If you go that far, you might even want to check it at 2 hairs. If it hasn't made a difference by then, its not the TPS.

 

[mopar4u]

Whooo, hold on.  I wouldn't  touch that TPS without a multimeter and a service manual if you want to do it yourself.  Yes it would be a good idea to calibrate it.  No I wouldn't do it "blind folded".  I just calibrated my tps on my 95 zr efi (i'm assuming it is the same concept).  It is very easy to do.  I did not need any special tools from the dealer, only a digital multimeter (which is nice to have anyway).  You need to get the specs from a service manual.  By having the manual and multimeter you can also check all your other efi components.  If you do go this route, the manual may tell you that you need a special harness to tap into the wire system to check DC volts on your TPS, you don't need it, just back probe the TPS harness.

 

[98xcr700]

my dad has a 93 rxl with aaen pipes,chip,and clutch kit. that machine does the exact same thing! the service manual says the tps should be about 400 to 700 ohms at idle and 4500 ohms at wot, with a smooth transition between the two. I can't figure this thing out! I've checked every sensor and all the wiring and can find nothing wrong. Somebody told me to make sure the pistons don't have a broken skirt on the intake side, but thats not it either. we tried a new chip and computer but that did'nt work either. those tps specs are for a '93 I don't know if their the same. If you figure it out please let me know.

 

[rxl650/mxz700]

i have a 1992 rxl 650.  last year it was boggin really bad just like you guys said.  the next thing i know i am puttin a new piston in it.  the fuel regulator on the end of the rail was clogged up and it wasn't allowing fuel into the cylinders.  A 60 dollar part costed me 400.  not sure if this is the same problem or not, but would check it out!

 

[tank]

I had a similar issue with my 91 RXL. It turns out that one of the pistons was partially broken.

 

[z800rotax]

A friend of mine had one doing the same thing and it turned out
to be the sock on the end of the fuel pump.It would collapse causing
a momentary lack of fuel pressure.Just a thought.

 

[jsledder]

If anyone finds a cure all for the "RXL Bog" let me know.

The TPS should be left alone without a the right tools, too far one way or the other and your looking at a seizure, one thing you can try it adjusting the little screw in the computer box, 1/4 turn either direction should make a difference, just remember how far and what direction you turn it.

I have one of those Select Monitors if you would happen to be anywhere near SD.

Another thing is that I had a broken wire on the wiring going into the TPS, just broke enough that it made contact sometimes, fixed that and it seemed to help.

Another thing, does it have a button down by the key?? the fuel enrichener button as they call it? Those can be real trouble.

 

[SkiDoo MXZ 800]

Do you stil own an XCR 700. Had a 1999 last season....wow, that seld was fast.....pull the skis at 20 mph. None of my buddies could even get close.

Sold last season, 2002 MXZ 800 this season.....trying big bore twins....hope it is as fast. but lighter.

Ride on brother... :hallo2: