1981 Cr 80 Cold Start Problem

C

CENPAPETE

Member

Oct 30, 2006

13

0

• Oct 30, 2006

• #1

I just acquired a 1981 CR 80 that has not run for several years.
I found no spark and the stator bad.
I replaced the stator and got a spark but could not start.
I tried taking out the spark plug and putting in some fuel and got it to start.
Once I do that and run it a bit it runs great and starts easily once warmed up. When the engine cols it will not start. If I take the plug out and put some fuel in it will start and then once warm run great. Any suggestions as to what the problem might be?

 

C

CRazy250

Member

May 28, 2006

334

1

• Oct 30, 2006

• #2

CLEAN YOUR CARB! if you havent im sure thats your problem or the fact the ring is worn out and has no compression

 

C

CENPAPETE

Member

Oct 30, 2006

13

0

• Nov 3, 2006

• Thread starter
• #3

COMPRESSION & CARB CLEANING

Thanks for the info, it has plenty of compression and runs great with plenty of power once started. I just cannot get it started when cold without putting some fuel into the cylinder. It must be something with the Carb. I have pulled it and there is no gunk or build up of any kind inside. I did not want to mess with it to much but there must be a clogged jet somewhere so I guess I will have to tear it apart and clean it as best as I can and see what happens. Never taken a carb apart before though. Does anyone have any suggestions as to which jet might cause this problem?

 

M

mideastrider

~SPONSOR~

Jul 8, 2006

827

1

• Nov 3, 2006

• #4

With the carb off the bike my sure you screw out your choke assembly and clean out all the passages associated with the choke. Use a aerosol carb cleaner with a straw.
Also clean everything very well and it should work. Hope this helps.

 

C

CENPAPETE

Member

Oct 30, 2006

13

0

• Nov 3, 2006

• Thread starter
• #5

Thanks, I will be working on it this week end hopefully thats all it will take.

 

J

jason33

Member

Oct 21, 2006

655

0

• Nov 13, 2006

• #6

pilot jet is probably clogged ,clean it out thouroughly
use a guitar string ,or needle to make sure the holes are clear
did you see my reply to the stater?- its avail from dennis kirk-$60