burpin my xc sp

by **jake@ss** » December 13th, 2001, 12:44 am

hey guys i own a 2001 xc sp 500 and have a small problem. after i start the sled up and let it warm up, i hit the throttle and the sled seems to hesitate and almost burp. now if i pump the throttle the sled takes off like a champ. i am thinking that it could have some thing to do with the variable exhaust because i put new plugs in it and there was no change any ideas? if you guys do think its the exhaust could you please inform me on how to set it up correctly, as a matter of fact even if it isn t and you know how to set it up can you fill me in anyway, thanks guys

by **500xcsp** » December 13th, 2001, 7:29 am

what kind of oil are you using?

by **xcsp** » December 13th, 2001, 8:57 am

I also have a 500 that does that. A local dealer told me that they have corrected it on the '02 models by adjusting the timing-at least that's what they say. I haven't pushed them as to see if they will actually check mine and adjust it.

by **d-man** » December 13th, 2001, 4:27 pm

I have an '02 500 and it does the same thing although only when it's warm outside. It might be because the VES has some extra air inside and it "backfires" or pops it out. After that "burp" does your sled run fine? Or does it keep doing that?

by **99xc600sp** » December 13th, 2001, 4:37 pm

Try adjusting your fuel/air mixture screws.

by **xcsp** » December 14th, 2001, 5:33 am

I made a call to Polaris today and the customer service rep is going to forward my complaint to whomever. I'll see if I get a response within the next week otherwise I will send a letter to see what can be checked out or done. I can't really see where oil would make a difference as I had used the TCW3 for break-in and now use the VES and it hasn't changed, as well as the dealer checked the air screw adjustment. Also, be it a cold or warmed up engine, it seems to be constant.

by **XC600Syclone** » December 14th, 2001, 12:50 pm

I agree with 99XC600 above. Your problem has nothing to do with what type of oil you are using, and it has nothing to do with the variable exhaust system. Your pilot jetting is slightly off (rich/lean). Without hearing it, I'd say your pilot system is slightly loading the system up with fuel (rich), and the momentary burble is as a result once the throttle is pulled (ie, too much fuel until it cleans itsself out)... Check your pilot air/fuel screws, and/or change your pilot jet size.

by **99xc600sp** » December 14th, 2001, 4:50 pm

Jake@ss turn your fuel/air mixture screw in about a 1/2 turn. That should help you out I had to do that to my 2000xc 500 when it gets warmer outside. When it gets cold out you may have to back them back out again. Turning screw in leans mixture out. XC600

*This Message was edited on 14-Dec-01 09:52 PM by 99xc600sp*

by **xcsp** » December 21st, 2001, 1:49 am

As I mentioned earlier, I contacted Polaris via their "800" number and hadn't received a response, so I called again to voice my concern, found out the customer service person is in New Jersey and they will fax the info to Minnesota (No e-mail?) I'll post the outcome.