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Re:Plugs fouling out quickly
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TOPIC: Re:Plugs fouling out quickly
#1004604
brianis (User)
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Re:Plugs fouling out quickly 9 Months ago  
Its not oil getting past its just running rich dry sorry plugs is there anyway to adjust the air fuel mixture I'm not familiar with our roadstar carbs because I've never had a issue with the bike
 
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#1004609
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Re:Plugs fouling out quickly 9 Months ago  
Iridium plugs don't create any more spark than standard plugs. It's not hotter, it's not fatter, it's not higher voltage, it just costs more and is somewhat more resistant to fouling because of the smaller electrode's behavior in the thermal cycle. Don't go changing plug heat ranges for fueling problems. The wrong band aid creates other wounds. I suspect since your bike had all that "dealer care" they threw in the big time rich jetting the hypercharger instructions recommend as a "starting point". I would run a big dose of top end cleaner through it before doing anything else. If it ran OK for 4 years, it can't be far off, and a dirty top end makes a big difference on these bikes.
 
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Re:Plugs fouling out quickly 9 Months ago  
Two questions. What does the tail pipe look like? (ash color or black) What are you getting for fuel mileage? You should be getting somewhere in the 40s
The year of the bike is ________.
 
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Last Edit: 2017/03/17 06:43 By JEastonjr. Reason: more info
 
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#1004660
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Re:Plugs fouling out quickly 9 Months ago  
So the tailpipe is normal black inside it's a 2000 and the bike runs fine I just don't feel like I'm getting the mileage I should out of the plug life it has run a little rich since I've owned it is there a air/fuel mixture adjustment or can I maybe just drop the main jet a jet size
 
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Re:Plugs fouling out quickly 9 Months ago  
Black is a good indication that it is burning rich. IMHO. I'd say your getting 20 something MPG. With all info you gave.

 
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Last Edit: 2017/03/17 16:05 By JEastonjr. Reason: add photos
 
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#1004673
Curt (Moderator)
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Re:Plugs fouling out quickly 9 Months ago  
To check to see if you are rich rub your middle finger inside the pipes about the full length of your finger. If you are rich your finger will be cover in black soot all over even down in the valleys of your finger prints. If you are lean there will be hardly any block soot at all. If you are correctly jetted you will have black soot only on the tops of your finger print peaks but not in the valleys. In my mind your first problem may well be the HyperCharger. They are tough to jet for but first check ALL rubber hoses and the boot of the HC for air leaks. Also you should try and readjust the PMS properly. If it was turned out to fat it could vibrate out. As for the HC I hate the so I won't go there.
 
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#1004736
brianis (User)
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Re:Plugs fouling out quickly 9 Months ago  
Can you explain the pms to me and what I'm looking for I'm not sure if it's even there I know the po had gotten rid of a lot of the stuff
 
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#1004737
BikerRon (User)
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Re:Plugs fouling out quickly 9 Months ago  
brianis wrote:
Can you explain the pms to me and what I'm looking for I'm not sure if it's even there I know the po had gotten rid of a lot of the stuff

Pilot Mixture (adjustment) Screw. Used to set fuel mix at idle.

Comes from the factory hidden by a small cover resembling a freeze plug with a small hole in it. If it has been removed, then you'll see a brass, slotted screw.

 
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Last Edit: 2017/03/18 12:31 By BikerRon.
 



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#1004823
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Re:Plugs fouling out quickly 9 Months ago  
jd750ace....what do you recommend for top end cleaner? How much?

brianis....seems strange that you would start running rich. Try taking off your air cleaner and riding. If you have a dirty air cleaner removing it should immediately show a change.

If you have cracks in your intake manifold, it will let air in which would lean out, not richen your mixture.

Seems odd that you've run your bike for four years at altitude with no issues. When I use to ride my Yamaha YZ 250 (going from sea level to 5000 feet altitude) I would change the needle clip one notch higher which moved the needle farther down into the main jet which leans out the mixture. Worked great and I did no other changes. I have a 2000 RS with: Freedom Performance 4 inch true duals, Barons BAK, a Barons ported manifold (that I ported even more because the porting it came with was a joke) and I live a sea level and have been chasing a rich condition for years. Best mileage I've seen is 35ish. I don't have issues with fouling plugs but they are black and sooty. I've changed main jets down to a 162.5 and kept a stock pilot jet. I'd be very interested in what changed on your bike. Maybe as our carbs get older there is something in them that cracks (rubber?) allowing more fuel to leak into the intake circuit richening the mixture? Whats wierd is I can turn in my PMS screw and there is no change. This just now started. Crazy though it runs like a scalded ape! I just wish I could get my plugs to run a tan color. Please keep us posted on your progress.
 
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Last Edit: 2017/03/19 13:23 By Seal_Bch_Tom.
 
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#1004863
Shores (User)
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Re:Plugs fouling out quickly 9 Months ago  
I alternate between Marvel Mystery Oil and Seafoam and go by the instructions on the bottle.
 
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