Am I running too rich? What should I do? - ATVConnection.com ATV Enthusiast Community



Honda Discussions about Honda ATVs.

Reply
 
Thread Tools Search this Thread
  #1  
Old 08-16-2017, 12:43 AM
Weekend Warrior
Thread Starter
 
Join Date: Aug 2017
Posts: 1
Default Am I running too rich? What should I do?

I have a 1986 Honda TRX250R. I believe it's running too rich because it fouls my plugs. It will turn a new plug moist black, sooty, looks like diesel fuel, it drips out between exhaust and pipe.

1. checked cylinder and boot for air leaks (used radiator pump through the top, plugged exhaust, spray soap/water and watched for bubbles). Also sprayed starter fluid while running, no change
2. checked reeds, okay by 2 mechanics (should I get new anyway?)
3. fuel mix: 32:1, 93 octane pure gas, Honda pure synthetic 2 cycle oil
4. carburetor: air screw 1 3/4 out, 150 main, 48 pilot, clip on 2nd
5. engine displacement: bored 66.50 (Pro X piston and ring kit)
6. compression: WOT cold 150 psi, warm 135 psi, 222' elevation (should compression be higher?)
7. clean air filter, tried with lid on and off
8. exhaust: removed muffler, burnt it out, new packing in silencer
New top end and gaskets, new 35mm Keihin PWK air striker carb, new Pro X crank seals, new Rick's stator, new OEM ignition, Fmf muffler silencer w/new packing, K&N air filter

I have detailed videos I can send. Thank you.
Reply With Quote
  #2  
Old 08-16-2017, 05:30 AM
old polaris tech's Avatar
Polaris ATV Expert
Retired and loving it!
 
Join Date: Jun 2008
Location: North Texas
Posts: 22,296
Default

First off fuel shouldn't be dripping between the exhaust and pipe. That's probably carb related,float level off,etc. Plug chopping is still one of the easiest ways to check jetting. Just get the engine warm and at a high speed kill the engine and stop as soon as you can. If the plug is still black and sooty,drop a couple main jet sizes and make another test run.Plug needs to be between a tan to medium brown color.
Reply With Quote
  #3  
Old 08-16-2017, 10:53 AM
DirtDevil101's Avatar
Pro Rider
 
Join Date: Oct 2015
Posts: 852
Default

Reply With Quote
  #4  
Old 09-12-2017, 12:21 PM
Ice_D's Avatar
Weekend Warrior
 
Join Date: Sep 2017
Posts: 17
Default

Sounds a lot like a stuck float or needle valve in the carb. Needle seat could be obstructed or the float is snagged or in need of adjustment. I've fixed this prob in the past by tapping on the carb with the blunt end of a screwdriver. Hope you get er going!
Reply With Quote
  #5  
Old 09-13-2017, 02:02 AM
Pro Rider
 
Join Date: Oct 2013
Location: Lancaster England
Posts: 2,238
Default

"removed muffler, burnt it out, new packing in silencer"

Don't know the 250R but never heard of a two stroke with packing in the exhaust. Any I have come across have baffle type silencers. A four stroke silencer won't work on a tuned two stroke engine. If the float level was well off, the carb would dribble when the engine is stopped. Choke stuck on or a jet worked loose is most likely, but as the engine has been altered, wrong jets or exhaust is a distinct possibility. An ignition fault, causing the engine not to fire every rev is an outside possibility too.
Reply With Quote
  #6  
Old 09-13-2017, 02:28 AM
old polaris tech's Avatar
Polaris ATV Expert
Retired and loving it!
 
Join Date: Jun 2008
Location: North Texas
Posts: 22,296
Default

Quote:
Originally Posted by merryman View Post
"removed muffler, burnt it out, new packing in silencer"

Don't know the 250R but never heard of a two stroke with packing in the exhaust. Any I have come across have baffle type silencers.
Repacked quite a few over here. Exhaust systems may be different across the pond?
Reply With Quote
  #7  
Old 09-14-2017, 02:36 AM
Pro Rider
 
Join Date: Oct 2013
Location: Lancaster England
Posts: 2,238
Default

I must admit I don't do a lot with two strokes, we get a few LT50s and 80s, and the occasional machine with that 90cc Chinese two stroke that Polaris used. Still seems weird to use absorbtion silencers, as all modern two strokes have tuned exhausts, which depend on resonance in the silencer.
Reply With Quote
  #8  
Old 09-14-2017, 08:59 AM
old polaris tech's Avatar
Polaris ATV Expert
Retired and loving it!
 
Join Date: Jun 2008
Location: North Texas
Posts: 22,296
Default

They still use packing on both atvs and dirt bike silencers, 2 and 4 stroke.Here's a sample from Fmf.Product List : FMF Racing Click on the packing pics and shows for both plus they list the silencers available for the 4 strokes also.
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Polaris Twin 700 efi 2004 after harness replacement code 45 Rockentoo Polaris ATVs - Ask an Expert! 1 08-04-2017 02:44 AM
Redcat 110 kazuma James Reynolds Chinese Quads 3 07-31-2017 05:20 PM
Two stroke Carb Understanding pastorjeep Kids Quads & Other ATV's - Ask an Expert! 12 07-21-2017 08:33 PM
Polaris 325 magnum choke cable re route bogging green giant Polaris 5 06-19-2017 07:11 PM
Polaris 325 Magnum Running Rich No Top END shortexpedition Suzuki 0 06-18-2017 09:20 PM



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 12:10 AM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: