carb problems on 1986 polaris trail boss 250 - ATVConnection.com ATV Enthusiast Community

Go Back  ATVConnection.com ATV Enthusiast Community > Brand Discussions Area > Polaris
Reload this Page >

carb problems on 1986 polaris trail boss 250

Polaris Discussions about Polaris ATVs.
Sponsored by:
Sponsored by:

carb problems on 1986 polaris trail boss 250

  #1  
Old 07-08-2008, 05:53 PM
Weekend Warrior
Thread Starter
Join Date: Jul 2008
Posts: 11
Default carb problems on 1986 polaris trail boss 250

About three days ago i was riding this macine with good power and throttle response. I put the air box and cleaner back on the machine and now it wont rev up. I took the air cleaner off again and still no power. I can hold the throttle wide open and it just barley moves. It seems to me that its not getting enough air or too much fuel. Ive cleaned the carb a 100 times and still nothing. I did a compressions test and its 150 - 130 psi which should be fine. THe spark is very good as well. What am i missing? It went from screaming to barely getting out of its tracks. I can hold it wide open and it doesnt backfire. I am just confused because it was running great and now nothing. But it idles like a champ. How is that possible?
 
  #2  
Old 07-08-2008, 08:24 PM
Pro Rider
Join Date: Jun 2005
Posts: 2,343
Default carb problems on 1986 polaris trail boss 250

Check the clutch, maybe the belt came apart and is wrapped around the pulley. also make sure the oil pump is working they quit sometimes , you can get a block off kit for it and pre mix your gas , then you know it has oil. There is nothing in the breather tube to the air box is there?
 
  #3  
Old 07-08-2008, 08:27 PM
ftwflh's Avatar
Quad Patrol
Don't let the hp numbers fool you. Its all in how you get it to the ground. Clutching clutching clutching!
Join Date: Apr 2000
Posts: 6,688
Default carb problems on 1986 polaris trail boss 250

Ditto on the clutch the secondary buttons will cause that.
 
  #4  
Old 07-08-2008, 09:18 PM
Weekend Warrior
Thread Starter
Join Date: Jul 2008
Posts: 11
Default carb problems on 1986 polaris trail boss 250

i have the cover off the clutch and it doesnt tseem that anything is wrong with the clutch belt. I dont have the air filter or the breather box on the macine at all right now. when it sits and idles there is blue smoke so im pretty sure that its getting oil. What about one of the jets being clogged. WHich jet gives you the air mixture it needs.
 
  #5  
Old 07-08-2008, 09:19 PM
Weekend Warrior
Thread Starter
Join Date: Jul 2008
Posts: 11
Default carb problems on 1986 polaris trail boss 250

is a kit necessary to block off the oil. Cant i just disconnect it and just mix the gas?
 
  #6  
Old 07-08-2008, 09:31 PM
ftwflh's Avatar
Quad Patrol
Don't let the hp numbers fool you. Its all in how you get it to the ground. Clutching clutching clutching!
Join Date: Apr 2000
Posts: 6,688
Default carb problems on 1986 polaris trail boss 250

I wouldnt unhook the injector just be sure the cable is good and adjusted right.
On the clutch take the belt off,pull the back clutch take it apart and check the ramp buttons on the inside.
 
  #7  
Old 07-10-2008, 05:10 PM
Weekend Warrior
Thread Starter
Join Date: Jul 2008
Posts: 11
Default carb problems on 1986 polaris trail boss 250

Why wouldnt this rev up when its in neutral though? It runs the same in gear as it does out of gear. Does the clutch still play a part in it when its in neutral? It seems to me that once it gets to a certain point about half throttle it wont rev up. Seems like something is holding it back from higher rpms. In or out of gear.
 
  #8  
Old 07-10-2008, 11:47 PM
ftwflh's Avatar
Quad Patrol
Don't let the hp numbers fool you. Its all in how you get it to the ground. Clutching clutching clutching!
Join Date: Apr 2000
Posts: 6,688
Default carb problems on 1986 polaris trail boss 250

THe clutches turn even in neutral
 
  #9  
Old 07-11-2008, 12:25 AM
Weekend Warrior
Thread Starter
Join Date: Jul 2008
Posts: 11
Default carb problems on 1986 polaris trail boss 250

it was the rev limiter switch. Its bad. I ran it tonight and when i was riding it would rev up and shut down and rev up again. I unplugged it and it ran better but at full throttle it was backforing through the carb. Can you just unplug it without anything else limiting the rpms
 
  #10  
Old 07-11-2008, 12:59 AM
ftwflh's Avatar
Quad Patrol
Don't let the hp numbers fool you. Its all in how you get it to the ground. Clutching clutching clutching!
Join Date: Apr 2000
Posts: 6,688
Default carb problems on 1986 polaris trail boss 250

Pull the black wire will disable the reverse limiter.You may have a piece of dirt in the main jet,clogged air filfer,or bad gas.
 

Thread Tools
Search this Thread
Quick Reply: carb problems on 1986 polaris trail boss 250


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: