Rubicon carb slide sticking - ATVConnection.com ATV Enthusiast Community



Reply
 
Thread Tools Search this Thread
  #1  
Old 12-15-2016, 10:48 PM
JRM JRM is offline
Pro Rider
Thread Starter
 
Join Date: Sep 1999
Posts: 1,654
Default Rubicon carb slide sticking

Iv never seen a cv carb slide go bad, but mine keeps sticking- causing obvious carburation problems and stalling- I pulled it out, has visible scuffing. Is this a common failure? If I spray it with silicone I get a few more hours of clean carburation before it starts hanging again.
where is the best parts site to order from?
Thanks, Joe
Reply With Quote
  #2  
Old 12-16-2016, 03:10 AM
Pro Rider
 
Join Date: Oct 2013
Location: Lancaster England
Posts: 1,903
Default

Afraid it is common to the carb fitted to 500 Hondas. I ended up fitting a new slide assembly to one a couple of years ago, but it did stick again about a month back. Never had the problem with the smaller carb fitted to 300 to 450 models. The 500 carbs are also more prone to wearing the needle and holed diaphragms.
Reply With Quote
  #3  
Old 12-16-2016, 10:49 AM
DirtDevil101's Avatar
Pro Rider
 
Join Date: Oct 2015
Posts: 669
Default

is the slide plastic or metal?
Reply With Quote
  #4  
Old 12-16-2016, 10:15 PM
JRM JRM is offline
Pro Rider
Thread Starter
 
Join Date: Sep 1999
Posts: 1,654
Default

its a grey plastic composite of some sort. ill order a new one and drop it in- fingers crossed
Reply With Quote
  #5  
Old 12-19-2016, 10:36 AM
DirtDevil101's Avatar
Pro Rider
 
Join Date: Oct 2015
Posts: 669
Default

I have 4 similar plastic CV type slides in my Vmax...light coat of WD40 or similar will help increase the lifespan/operation...
Reply With Quote
  #6  
Old 03-19-2017, 10:07 PM
JRM JRM is offline
Pro Rider
Thread Starter
 
Join Date: Sep 1999
Posts: 1,654
Default

Bringing this old thread back, I dropped in a new $80 slide and it worked perfect....for a day. So since that cured it for ultra short time I assume that's the problem- so, fast forward to today- Almost didn't get it back to the house it was acting up so bad. Even on a gravel road at 35mph with steady throttle it began to lean out and backfire- then carbureted ok for a few seconds. Its really awful at low speeds, only runs clean at WOT. SO- what on earth should I do? Cant do a $80 slide every time I want to ride- Is the newer 2007+ larger carburetor a drop in replacement? This is a Mint 2001 Rubicon with only 700 miles on it, always fed ethanol free fuel- totally pampered as it lives its life in the back of my heated garage but this darn CV POS of a carb has me beside myself. Here is a video I took when it first started to happen- beginning and then around the 6 min mark are best
Reply With Quote
  #7  
Old 03-20-2017, 03:02 AM
Pro Rider
 
Join Date: Oct 2013
Location: Lancaster England
Posts: 1,903
Default

Sorry to hear my "fix" didn't work. However there is only two things it could be, either the piston worn and sticking, or the carb body worn and sticking. I would give the part where the piston runs a good clean with metal polish, making sure you get it all off afterwards. I can't see oiling it working, as the piston gets a constant spray of fuel mist which will clean any oil off in seconds, but no harm in trying. I sometimes wonder if the back spray, caused by fairly wild cam timing, is the problem, and that cam chain stretch, causing even wilder timing, may be at the root of the excessive carb wear problem. However it may be cheaper, and a lot easier, to fit a new carb than to investigate the valve timing.
Reply With Quote
  #8  
Old 03-20-2017, 12:27 PM
DirtDevil101's Avatar
Pro Rider
 
Join Date: Oct 2015
Posts: 669
Default

Sometimes carbs just wear out...
Reply With Quote
  #9  
Old 03-20-2017, 03:07 PM
JRM JRM is offline
Pro Rider
Thread Starter
 
Join Date: Sep 1999
Posts: 1,654
Default

Reached out to some of my friends who went threw MIT, they said to buy a EFI quad and stop being cheap- but did give some advice that I think I will try:
1. Do the Rincon carb mod- where Rincon owners cut 2" off the spring and drill the vacuum hole in the slide larger to get faster throttle response, since mine acts up when asked for power its the upward movement that's sticking- so this mod may just work??? I will drill my old slide as a test. Will report back with results.
Reply With Quote
  #10  
Old 03-21-2017, 09:10 AM
DirtDevil101's Avatar
Pro Rider
 
Join Date: Oct 2015
Posts: 669
Default

Drilling the slides is also a Vmax mod...unfortunately many have had mixed results. if you're going to trim the spring & drill the slide, do it in very small increments...because once you go down this path it is VERY hard to reverse course...
Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 09:27 AM.


 
  • Ask a Question
    Get answers from community experts
What's your question?
Send