Loud exhaust bang on startup
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Cruiser
Joined: May 2012
Posts: 129
Likes: 0
From: Olmsted Falls, Ohio
Loud exhaust bang on startup
Hey I have an 09 rk with stage 1 and every now and then, only when the bike is cold and I try starting it , right when it starts the exhaust lets out a pretty loud bang/backfire pop.... After it starts it's all good from there....bike feels like it has a hard time starting when it's cold like the battery is dead and I just replaced it last year and keep it on a charger when not in use .... Sometimes it will backfire through the air filter too but thats a rare occasion.. Is this a compensator issue or exhaust related? Or is it just because the motor is shut off in a certain spot ? I have a full Vance and Hines exhaust set and bike has been dynoed after I staged 1 it.
Appreciate any input
Appreciate any input
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
likely to do with your tuning compensation- what ever they used, however they set it.
when your motor stops it will always stop with one of the cylinders on the compression stroke- either the front or rear cyl.
mike
when your motor stops it will always stop with one of the cylinders on the compression stroke- either the front or rear cyl.
mike
Thread Starter
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Cruiser
Joined: May 2012
Posts: 129
Likes: 0
From: Olmsted Falls, Ohio
No rattling in the primary, just a whirling noise that I have been told is normal and I have heard it on other Harley's.... Bikes got 22k on the odometer and it had the starter replaced way back due to a recall
Supporter
Joined: Feb 2008
Posts: 4,133
Likes: 147
From: Grays Creek, NC
Sounds exactly like what mine sounded like when I lost my first two compensators.
If your due for a primary oil change or clutch adjustment I would pull the primary cover and take a look at the comp.
If your due for a primary oil change or clutch adjustment I would pull the primary cover and take a look at the comp.
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Cruiser
Joined: May 2012
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From: Olmsted Falls, Ohio
Sounds like it might be better safe then sorry to just change it out and hope it helps , couldn't hurt ... I called Harley and they wanted 300 for the kit and 50 for some adhesive for a oil splash guard you have to glue to your primary... Seems steep for glue, I am hoping whatever is wrong can last til the end of the season so I can do it over the winter
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Supporter
Joined: Feb 2008
Posts: 4,133
Likes: 147
From: Grays Creek, NC
Sounds like it might be better safe then sorry to just change it out and hope it helps , couldn't hurt ... I called Harley and they wanted 300 for the kit and 50 for some adhesive for a oil splash guard you have to glue to your primary... Seems steep for glue, I am hoping whatever is wrong can last til the end of the season so I can do it over the winter
Do you have the means to drain your primary and pull the cover yourself? If you did if would just be the cost of putting in new primary fluid to check, you can reuse the gasket. If you pull the cover and see nothing wrong with the comp you would be saving $300-400 instead of buying the comp and not needing it. If yours is still good you don't want the SE type, I'm about to replace my third and the last was the 2014 style.
Road Warrior
Joined: Apr 2010
Posts: 1,648
Likes: 37
From: Monroe, Louisiana
Hey I have an 09 rk with stage 1 and every now and then, only when the bike is cold and I try starting it , right when it starts the exhaust lets out a pretty loud bang/backfire pop.... After it starts it's all good from there....bike feels like it has a hard time starting when it's cold like the battery is dead and I just replaced it last year and keep it on a charger when not in use .... Sometimes it will backfire through the air filter too but thats a rare occasion.. Is this a compensator issue or exhaust related? Or is it just because the motor is shut off in a certain spot ? I have a full Vance and Hines exhaust set and bike has been dynoed after I staged 1 it.
Appreciate any input
Appreciate any input