exhaust mods and programmer. - Star Motorcycle Forums: Star Raider, V-Max, V-Star, Road-Star Forum
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post #1 of 15 (permalink) Old 04-16-2014, 07:22 PM Thread Starter
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exhaust mods and programmer.

I know its been discussed but not sure where or if id get my answer here so....if i run some custom straight pipes (no muffler can) on my 950 will i NEED a fuel programmer? or can i run it just fine with the stock ecu? Thanks all

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post #2 of 15 (permalink) Old 04-17-2014, 02:12 PM
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At that point I would imagine you would want to run one at the very minimum as you are going to increase output on the exhaust side tremendously. I'm not versed in the 950 but doesn't it have a catalytic converter on it as well? If so I bit its in the muffler and youll really be playing with fire on a computer controlled vehicle.

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post #3 of 15 (permalink) Old 04-17-2014, 09:13 PM Thread Starter
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Yea im on a search for an experienced answer. Ive heard thoufhts from both ends and both have valid points but little proof. Ive seen a guy online that ran his with custom straight pipes welded on but cant get in touch to see if using a programmer. Found him on youtube and Hes in Australia lol. Thanks for the input

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09' Vstar "frankenstar" 950
modded air kit w/k&n filter
Custom homemade exhaust
Saddle bags
Highway bars
Handmade side mount license plate
Handmade floorboard extensions
10" apes
Removed turn signals
Blue led accents
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post #4 of 15 (permalink) Old 04-17-2014, 10:21 PM
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On a car you wouldn't need a programmer as the computer can adjust. Can't imagine you'd need one. I have no baffle straight pipes on my 1300 and no programmer for thousands of miles. Runs great and great mpg.
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post #5 of 15 (permalink) Old 04-17-2014, 10:44 PM Thread Starter
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Yea thats the same logic i get from a lot of car mechanics and gear heads. Most bikers seem to lean towards programmers and bike mechanics dont seem to know, lol. I think the push to have one is more of a safety net. I think im gonna chop it off, add a lentgh of pioe, heat wrap it, and let her eat. If it runs rough or bad then ill put it back on. Monday its on.....tuesday youll have my update.

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09' Vstar "frankenstar" 950
modded air kit w/k&n filter
Custom homemade exhaust
Saddle bags
Highway bars
Handmade side mount license plate
Handmade floorboard extensions
10" apes
Removed turn signals
Blue led accents
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post #6 of 15 (permalink) Old 04-18-2014, 06:53 PM
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Yea thats the same logic i get from a lot of car mechanics and gear heads. Most bikers seem to lean towards programmers and bike mechanics dont seem to know, lol. I think the push to have one is more of a safety net. I think im gonna chop it off, add a lentgh of pioe, heat wrap it, and let her eat. If it runs rough or bad then ill put it back on. Monday its on.....tuesday youll have my update.
The smart move would be to have the AFR checked after you did it. Any car repair place can at least give you an idea.

The reason for a programmer is to make sure that you have the optimum performance after doing a change. Test and change accordingly. If you don't really care....then it's not an issue.

As long as the 950's and 1300's have been out, I find it kind of funny that no one has taken the time to do that little bit of research (like a little dyno testing) and share it.

Also keep in mind that getting advice form guys with water cooled bikes may not be the best thing to follow.

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post #7 of 15 (permalink) Old 04-18-2014, 07:21 PM
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Not the same bike but The first thing I did was change out my exhaust. I went from the oem 2 into 1 to V&H Big Shots (2 into 2) and after I did I didnt have any backfiring etc. but wanted to be sure I wasnt going to damage the motor running like that so I went to a local place that dyno's bikes and after the tests I was running JUST under the parameters of being too lean. I ran it like that for a season or two on 93 octane fuel until i added a air intake and then I needed a programmer. I had it dynoed last summer at a rally and the tests came back both cylinder well within the parameters and front cylinder was running a bit leaner. The only way to fix that is a custom program...maybe next year,lol.

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post #8 of 15 (permalink) Old 04-18-2014, 07:43 PM Thread Starter
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I agree. No posted results anywhere of anything lol. Now i thought thered be someting to test after changing it. How would a shop check the afr on my bike? Im a bit new to these sorta things. I just know it can be done without spending a ton and still run great....just hoped for proof. Ill do it, check,and post. Stay tuned....going "under the knife" monday.

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09' Vstar "frankenstar" 950
modded air kit w/k&n filter
Custom homemade exhaust
Saddle bags
Highway bars
Handmade side mount license plate
Handmade floorboard extensions
10" apes
Removed turn signals
Blue led accents
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post #9 of 15 (permalink) Old 04-19-2014, 08:13 AM
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How would a shop check the afr on my bike? Im a bit new to these sorta things. I just know it can be done without spending a ton and still run great....just hoped for proof. Ill do it, check,and post. Stay tuned....going "under the knife" monday.
They can check it just like they do cars....with a probe up the pipe. It might cost you about 1/2 hour labor or so...but then you'd know. I'd check it at an idle, then again at cruising RPM.

If you have access to a dyno, that's the very best way to tell what's giong on. AFR is charted on a graph along with HP, torque and RPM. It's really the only way to tell what any fuel related modification has done to the overall system. Without proven printed data, everything you hear is just so much BS. When the V Star 1100's came out, we had them pretty much dialed in after 3-4 years of sharing data (and found a proven way to get a 10% HP increase for under $150). I've yet to see anything on the 950....and that motor has some potential.

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Last edited by Sick Mick; 04-19-2014 at 08:23 AM.
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post #10 of 15 (permalink) Old 04-19-2014, 05:36 PM
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When the V Star 1100's came out, we had them pretty much dialed in after 3-4 years of sharing data (and found a proven way to get a 10% HP increase for under $150). I've yet to see anything on the 950....and that motor has some potential.

Someone posted dyno info on a 950 on another particular forum a while back that documented a 10hp increase with aftermarket pipes, intake, and controller

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