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TOPIC: Re:Changed pipes change jetting?
#109733
daglassguy (User)
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Changed pipes change jetting? 3 Months, 1 Week ago  
I have a 2001 roadstar. I put Baron Nasty habits (no baffles) BAC, and a barons jet kit. The Bike ran like a scalded cat and I ran a fairly consistent 48 to 52 mpg. I recently changed to vance & hines shortshots staggerd. The bike now seems to be running rich. The plugs show a fairly good burn, but the pipes are black and sooty. My mpg has dropped to 32 to 40 mpg. Should I rejet or will tweeking the needle position solve this?
 
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#109747
BigBoyinMS (User)
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Re:Changed pipes change jetting? 3 Months, 1 Week ago  
Odd... just changing from open pipes to open pipes shouldn't make that much difference. But I would try adjusting the PMS first.
 
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#109773
daglassguy (User)
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Re:Changed pipes change jetting? 3 Months, 1 Week ago  
The vance and hines pipes do have baffles in them. I just ran out and re-checked to make sure.
 
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#109777
javawave (User)
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Re:Changed pipes change jetting? 3 Months, 1 Week ago  
You have added some back pressure now. If you had rejetted for pipes with no baffles and now have pipes with more back pressure, you may need to rejet to compensate. I will leave the recommendations to the experts, but yes, in this case I would say you may need too.
 
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#109784
daglassguy (User)
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Re:Changed pipes change jetting? 3 Months, 1 Week ago  
Im thinking you are right. Believe this had a 165 main in it originally. When I got the BAC and jet kit, was changed to 170. Hoping for a expert who has had the same thing happen.
 
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#109787
Musky (Moderator)
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Re:Changed pipes change jetting? 3 Months, 1 Week ago  
Try setting the PMS using the in / out method.
 
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#109802
daglassguy (User)
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Re:Changed pipes change jetting? 3 Months, 1 Week ago  
I ordered a barons PMS screw and am waiting for it before putting carb back together. Do you think if I drop the needle a notch that it will help the rich problem?
 
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#109808
DocShadow (Admin)
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Re:Changed pipes change jetting? 3 Months, 1 Week ago  
You don't know where it running rich so first ....

... do the WOT test.

Doc

BTW .... switch back to the Nasties.
 
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