Any Harley mechanics here?

[Shooters Edge]

I have a 99 dyna wide glide. The diaphragm on the fuel petcock is leaking. Can this cause the bike to run "rich"? If I replace the petcock with a pingle, all I would have to do is plug the vacumm line right? Any suggestions would be appreciated. Thanks, Shooter

 

[Greybeard]

No if the diaphragm is leaking fuel it will not run rich, maybe lean depending on how much it opens. Yes if you replace the valve just plug the line. Instead of a Pringle, look at jp cycles for a s/o valve. 19 bucks vs 91 bucks.
If you are running rich I would look at my float, setting might be a little on the high side.
If, if the diaphragm is leaking, (your petcock is never closed) and if your float is on the high side, it would make it run rich for a little bit. That’s why they made it vacuum back up to prevent fuel entering the cylinders when shut down.

 

[CAMSDADDY]

Wonder if the trash or cleaners or whatever that made the petcock fail is also effecting the carb.

 

[hjblwme]

What is making you believe that the bike is running rich?


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[Shooters Edge]

What is making you believe that the bike is running rich?
The smell of fuel and backfire when deceleration.

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[Shooters Edge]

Wonder if the trash or cleaners or whatever that made the petcock fail is also effecting the carb.

Could be.

 

[Shooters Edge]

No if the diaphragm is leaking fuel it will not run rich, maybe lean depending on how much it opens. Yes if you replace the valve just plug the line. Instead of a Pringle, look at jp cycles for a s/o valve. 19 bucks vs 91 bucks.
If you are running rich I would look at my float, setting might be a little on the high side.
If, if the diaphragm is leaking, (your petcock is never closed) and if your float is on the high side, it would make it run rich for a little bit. That’s why they made it vacuum back up to prevent fuel entering the cylinders when shut down.

I can see the diaphragm on the petcock drip fuel when I have the fuel turned on at idle. When I ride and shift into the next gear it pops. When I left off the throttle when riding it pop pa pa pop pops?

 

[Shooters Edge]

I'm no mechanic by any means. I just hate having to spends a bookoos of $ at the shop if it is something simple I can do at home.

 

[medium187mph]

@Tazz

 

[galvatron]

Popping on deceleration is not sign of running rich, just the opposite.

Check your exhaust at the heads for leaks, loose bolts.