Go Back   Motorcycle Forum > Motorcycle.Com General Discussion > Motorcycle Mods and Maintenance

Reply
 
Thread Tools
Old 07-28-2009, 08:39 PM   #1
kouie
Registered Member
 
Join Date: Jul 2009
Posts: 2
Default is it really neccessary to remap?

i own a 2009 harley davidson nightster...i just finished putting on a screamin eagle heavy breather and vance and hines full exhaust kit...it backfired on me a couple of times after my first ride...i talked to vance and hines and they said i had to remap my bike...i read somewhere that it isnt neccessary to remap with newer bikes...which one is it?
kouie is offline   Reply With Quote

Sponsored Links Remove Advertisements
Motorcycle Forum
Advertisement
Old 07-28-2009, 09:11 PM   #2
mscuddy
MODERATOR X

 
mscuddy's Avatar
 
Join Date: Jun 2007
Location: Next to my still checkin the temp.
Posts: 5,448
Default

Yes, you have to re-map the ECM, TPS & MAP sensor to take into account more air flowing through the motor. Backfiring could either indicate an overly lean condiiton, or an exhaust leak somewhere in the system (most likely where the head pipes slip into the collectors). Also check the exhaust pipe flange at the exhaust port. Engine control modules make tiny adjustments for opened up intake and exhaust systems, but not enough to make any difference where roasted valves are a defenite possibility.

Failing to do that might void the warranty, and burn up some exhaust valves down the line. You can lessen this issue by clogging up the pipes with steel wool, but you want that neat ear splitting, car alarm tripping rolling thunder sound, now dontcha...
__________________
A gun is a tool, Marian; no better or no worse than any other tool: an axe, a shovel or anything. A gun is as good or as bad as the man using it. Remember that.
mscuddy is offline   Reply With Quote
Old 07-29-2009, 07:20 AM   #3
Kenneth_Moore
Registered Member
 
Kenneth_Moore's Avatar
 
Join Date: Jun 2007
Location: VIsiting the GIft Shop in the Pit of DIspair
Posts: 7,118
Default

Quote:
Originally Posted by kouie View Post
i own a 2009 harley davidson nightster...i just finished putting on a screamin eagle heavy breather and vance and hines full exhaust kit...it backfired on me a couple of times after my first ride...i talked to vance and hines and they said i had to remap my bike...i read somewhere that it isnt neccessary to remap with newer bikes...which one is it?
You need the remap or a Power Commander replacement ECU. If the exhaust change is a one-time deal and you don't plan further mods, go to the HD shop and pay them to do it. They'll charge you for a stupid cartridge that has the new map on it, which they use once and throw away. If you plan further changes to the engine, pony up the $300-$400 for the Power Commander and you can do the same thing with a PC.
__________________
www.kennethmoore.org
Kenneth_Moore is offline   Reply With Quote
Old 07-29-2009, 07:27 AM   #4
SmokeU
Registered Member
 
SmokeU's Avatar
 
Join Date: Jun 2007
Location: pet****...pet****...pet****
Posts: 1,864
Default

Quote:
Originally Posted by Kenneth_Moore View Post
If you plan further changes to the engine, pony up the $300-$400 for the Power Commander and you can do the same thing with a PC.

Assuming he can operate a PC.
SmokeU is offline   Reply With Quote
Old 07-29-2009, 11:25 AM   #5
kouie
Registered Member
 
Join Date: Jul 2009
Posts: 2
Default

Oh...how to operate a pc? Hmmm...sounds tough. Why don't u go **** yourself. If you're not gonna answer my question don't post a reply jackass!
kouie is offline   Reply With Quote
Old 07-29-2009, 11:44 AM   #6
Kenneth_Moore
Registered Member
 
Kenneth_Moore's Avatar
 
Join Date: Jun 2007
Location: VIsiting the GIft Shop in the Pit of DIspair
Posts: 7,118
Default

Quote:
Originally Posted by SmokeU View Post
Assuming he can operate a PC.
I think he has the PC part down ok.
__________________
www.kennethmoore.org
Kenneth_Moore is offline   Reply With Quote
Old 07-29-2009, 12:00 PM   #7
SmokeU
Registered Member
 
SmokeU's Avatar
 
Join Date: Jun 2007
Location: pet****...pet****...pet****
Posts: 1,864
Default

Quote:
Originally Posted by Kenneth_Moore View Post
I think he has the PC part down ok.

I don't know, that has yet to be determined.
SmokeU is offline   Reply With Quote
Old 07-29-2009, 12:01 PM   #8
seruzawa
The Toad

 
seruzawa's Avatar
 
Join Date: Nov 2001
Location: 8501 ft.
Posts: 17,461
Default

I think kouie could fit right in here.
seruzawa is offline   Reply With Quote
Old 07-29-2009, 12:35 PM   #9
acecycleins
Founding Member
 
acecycleins's Avatar
 
Join Date: Jun 2007
Location: North Georgia
Posts: 4,129
Default

Kouie- typing in a forum and operating a PC or laptop for re-mapping is just a bit different from one another.
Ultimately, you need to dyno-tune the bike while re-mapping: Why- says the young jedi student?: Because maps are different and your state of tune is everything. Say for example you want peak HP because you like riding at a flat out pace. That map will be different than the map that drives that torque curve. So, ask yourself this question: Do I have enough experience with EFI and a computer to do this without having to put it on a dyno? You may well have that experience, but from your earlier post I'd say you need professional help to sort it out.
__________________
"Slack" - a state of being in which everything flows smoothly.....a frame of mind so at ease that the universe naturally cooperates.
acecycleins is offline   Reply With Quote
Old 07-29-2009, 12:50 PM   #10
The_AirHawk
Founding Member
 
The_AirHawk's Avatar
 
Join Date: Jun 2007
Location: Leanin' Tower O' P-P-P-P-POWAAAAAAAAA!!!!
Posts: 11,491
Default

I gotta remap every time I go on a trip - I hate foldin' them things up, and usually end up tearing holes in 'em. Good thing most States have 'em for free at them "Welcome Centers"..............
__________________
Parfois, on fait pas semblant
Sometimes, it's not pretend
Oderint Dum Metuant
Let them hate so long as they fear
политики предпочитают безоружных крестьян
Politicians Prefer Unarmed Peasants
Nothing to see here, Citizen. Move along now...
The_AirHawk is offline   Reply With Quote
Reply


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off