hi guys my 91 heritage runs fine on the open road and idils fine but when I am coasting through town or down a hill it pops and farts and misses. the timing is good so is it a carb problem and how can I fix it.
thanks.

 

Has it just started doing this ?

 

What BC asked. Did it just start or has it been doing it along?

If it been doing it all along, you may need to rejet. Any changes lately, different A/C or exhaust?

If not, and if it just started doing it, might be the jets starting to get clogged up. Run some seafoam thru it. If that don't clear it up, you may need to rebuild.

Edit: Just thought about something. Is it a CV carb? Could it have developed a pin hole in the diaphragm?

Edit Again: Post in the EVO section. Those guys know "everything" about EVO's and can help.

 

We were all Evo guys once I think and before that and before that.

 

Yep, my granddaughter will get my Evo. I just hope I can still ride it when I give it up. LOL She is only 12 so, 4 more years. LOL

 

Check for air leaks between the carb and intake.

 

I have only noticed it as I have just moved to town...do I rejet bigger.richer or do I go smaller ?

 

Mate I'd say there's an inlet or exhaust leak or something like that somewhere.
Just check the tension of carby and exhaust nuts/bolts before you do anything.
If they're fine then we'll go on to the carb .
Anything else unusual , hard starting or it's hotter when running ?

 

"just moved to town".......is there a significant elevation difference from where you were living? if so you may need to re jet for that

 

From the title of this thread, I thought you were talking about my Dad and his gastric problems.....

I was hoping to find a fix........

Oh well, never mind.....