99 INDY 500 Farts? - Snowmobile Forum: Your #1 Snowmobile Forum
http://www.snowmobileforum.com
Go Back   Snowmobile Forum: Your #1 Snowmobile Forum > Specific Snowmobile Forums > Polaris Snowmobiles


» Sponsors





Reply
 
LinkBack Thread Tools Display Modes
Old 01-23-2013, 11:26 AM   #1 (permalink)
P114
 
Join Date: Nov 2011
Location: Mass-Hole
Posts: 29
99 INDY 500 Farts?

Hi just looking for a little help.. as stated 99 Indy 500 900 miles on sled.. well maintained Ive been riding it for a few season with no complaints. the past two trips cold starts fine, but put about 15 miles or so on it then shut it down for a quick break. starts one pull then is very bogie for a few seconds till its gets high RPM's... then as i ride for the first 3/4 of a mile every time i let off the gas a little it "farts" or slight backfire. i can feel it in my thumb on the gas. ride it WOT for a few seconds and seams to go away.. no loss of power but now its doing it every time i stop and start or stop and let it idle for a few min again.. any thoughts as to where to look... its cold here and have to work on it outside...?? its got fresh high octain gas ran some seafoam in first tank of season.. always ran good...im confused
Thanks
INDY114 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 01-23-2013, 01:21 PM   #2 (permalink)
Registered User
 
ringneckryan's Avatar
 
Join Date: Dec 2012
Location: Alberta
Posts: 125
plugs look ok? maybe starting to show early fouling signs? i had similar problem and i thought the plugs looked good enough but it slowly got a bit worse each time. throw a set of new plugs in and try that. be sure to properly gap them too! no such thing as a 'pre gapped plug' out of box!
ringneckryan is offline   Reply With Quote
Old 01-23-2013, 01:29 PM   #3 (permalink)
P114
 
Join Date: Nov 2011
Location: Mass-Hole
Posts: 29
plugs new this season and look good.. not wet and tanish brown in color..?? whats the gap anyway? might try that...
INDY114 is offline   Reply With Quote
Old 01-23-2013, 01:48 PM   #4 (permalink)
Registered User
 
ringneckryan's Avatar
 
Join Date: Dec 2012
Location: Alberta
Posts: 125
not sure for your model. under hood is a sticker with all that info. trow new plugs in it anyway and just try it. cheap fix and if it doesnt fix it you spent $6 on new plugs. no biggie
ringneckryan is offline   Reply With Quote
Old 01-23-2013, 01:50 PM   #5 (permalink)
Super Moderator
 
RJ Gleason's Avatar
 
Join Date: Feb 2005
Location: Groton NY
Posts: 32,318
0.028.

Also, check that the chokes are functioning properly and seating when closed.
__________________
Old Cat Rider
'93 Wildcat 700EFI
w/ Comet 108 Pro-4 clutch & 01 ZR skid

'90 Wildcat Project in progress.

Vintage (sorta)
1980 Indy Trail 440 (for sale)
1980 AC Pantera (donor engine to the 90 wildcat)


http://www.dcdrifters.net/


Worshipful Master; F&AM Dryden Lodge# 472
http://www.masonicdryden472.org/

Rules of this forum are strictly enforced!
RJ Gleason is offline   Reply With Quote
Old 01-23-2013, 02:28 PM   #6 (permalink)
P114
 
Join Date: Nov 2011
Location: Mass-Hole
Posts: 29
wouldn't imagine the chokes causing that issue..?? but i guess it would be carb side seeing as i can feel the "pop" in the throttle...i guess im having a look at them.. sucks cause it like minus 10.F here...its too god*** cold to start fiddling with small parts..lol
INDY114 is offline   Reply With Quote
Old 01-23-2013, 02:40 PM   #7 (permalink)
Registered User
 
ringneckryan's Avatar
 
Join Date: Dec 2012
Location: Alberta
Posts: 125
99 INDY 500 Farts?

Backfire happens when fuel goes thru the cylinder without being burned. It gathers in the hot pipeand when it gets hot enough to burn it 'pops' and that what is called backfire. Thus back fire is cause by overfueling, likley caused by stuck open chokes or choke plungers not seating.

Trust me. Check your chokes. This has happened to me cause i over looked the chokes as an overfueling problem before and i worked on that dang thing for hours all for nothing, because I over looked the chokes


Sent from my iPhone using Snowmobile.com Free App
ringneckryan is offline   Reply With Quote
Old 01-23-2013, 04:47 PM   #8 (permalink)
P114
 
Join Date: Nov 2011
Location: Mass-Hole
Posts: 29
Great.. any suggestions for an easy fix...don't feel like removing air boxes and carbs.. i'm wondering if i can take a look at the chokes without removing.. just trying to picture it in my head.. sled is located elsewhere.. thanks for all the help..
INDY114 is offline   Reply With Quote
Old 01-23-2013, 07:00 PM   #9 (permalink)
Registered User
 
ringneckryan's Avatar
 
Join Date: Dec 2012
Location: Alberta
Posts: 125
Quote:
Originally Posted by INDY114 View Post
Great.. any suggestions for an easy fix...don't feel like removing air boxes and carbs.. i'm wondering if i can take a look at the chokes without removing..
Yep. Buy and new one and leave yours out where ever it broke down.

If your gonna have an old sled (like me) be prepard to remove the air box and wrench on the carbs a bit. In fact get used to it.

Last I checked (last night haha) Small Polaris 550 or 600 is between $6-8K and the top of the line sled will be close to $15K out the door!
ringneckryan is offline   Reply With Quote
Old 01-23-2013, 07:11 PM   #10 (permalink)
P114
 
Join Date: Nov 2011
Location: Mass-Hole
Posts: 29
haha..real funny...but i do agree.. the only problem is that the sled is like brand new.. 815 miles mint mint condition.. not even a scratch...its good enough for the riding we do... i have other issues that requires my money..like the new addition on my house..
thanks for the help tho...
INDY114 is offline   Reply With Quote
Old 01-23-2013, 07:23 PM   #11 (permalink)
Registered User
 
Rczr600rider's Avatar
 
Join Date: Apr 2012
Location: Amsterdam, New York
Posts: 1,111
Re: 99 INDY 500 Farts?

You can get the choke plungers out without removing the carbs, but if they are sticking I would recommend doing a thorough cleaning anyway. It's not likely they would be giving you problems while all other passages in their are fine.
Rczr600rider is offline   Reply With Quote
Old 01-23-2013, 07:31 PM   #12 (permalink)
Registered User
 
ringneckryan's Avatar
 
Join Date: Dec 2012
Location: Alberta
Posts: 125
no shop - so sled sits outside year round, 1999 model - that means 14 years old, engine backfires, sway bar fell off

I am sorry but that is not the definition of 'like brand new or mint condition'. 800 miles doesnt really mean that much - except to a wrecker. sorry to burst your bubble
ringneckryan is offline   Reply With Quote
Old 01-23-2013, 08:04 PM   #13 (permalink)
P114
 
Join Date: Nov 2011
Location: Mass-Hole
Posts: 29
wow ringneck.. while i do appreaceat your help, maybe i was miss leading. i have a garage at home but at camp both sleds sit in a inclosed Triton trailer that is weather and mouse tight. both sleds are well taken care of and summerized every year. sway bar was my fault due to a frozen heim joint that broke last season because i overlooked it under the skid plate. so the bushing fell out on the one mile tow back to camp.. but thanks for your help..
99 indy 500
04 700 xc
INDY114 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 11:39 PM.



Copyright SnowmobileForum.com

Search Engine Friendly URLs by vBSEO 3.6.0