Spark arrester drain plugs
#2
05-09-2011, 09:32 PM
Are you refering to Part #'s 92153a and 92153B the 6mm & 8mm bolts on the bottom of the stock mufler. I dont have the stock exh any more but since at least one of them has a gasket I assume they would let a litttle more exh gass flow. You would probably be bypassing the spark arrester but I would not sweat that on a sf.
I think it would be a better mod to either drill out the exh(should be able to find how by searching forum) or get a slip on.
If you have an aftermarket exh on allready then the "drain plugs" you are refering to might be bungs which provide a port for inserting an exhaust gas analyzer. Those are bigger holes and I would not run the bike with the plugs removed. I noticed my GF's SF has one of those bungs in the 4 barrel exh.
Cheers Jim
I think it would be a better mod to either drill out the exh(should be able to find how by searching forum) or get a slip on.
If you have an aftermarket exh on allready then the "drain plugs" you are refering to might be bungs which provide a port for inserting an exhaust gas analyzer. Those are bigger holes and I would not run the bike with the plugs removed. I noticed my GF's SF has one of those bungs in the 4 barrel exh.
Cheers Jim
#3
05-09-2011, 11:01 PM
Are you refering to Part #'s 92153a and 92153B the 6mm & 8mm bolts on the bottom of the stock mufler. I dont have the stock exh any more but since at least one of them has a gasket I assume they would let a litttle more exh gass flow. You would probably be bypassing the spark arrester but I would not sweat that on a sf.
I think it would be a better mod to either drill out the exh(should be able to find how by searching forum) or get a slip on.
If you have an aftermarket exh on allready then the "drain plugs" you are refering to might be bungs which provide a port for inserting an exhaust gas analyzer. Those are bigger holes and I would not run the bike with the plugs removed. I noticed my GF's SF has one of those bungs in the 4 barrel exh.
Cheers Jim
I think it would be a better mod to either drill out the exh(should be able to find how by searching forum) or get a slip on.
If you have an aftermarket exh on allready then the "drain plugs" you are refering to might be bungs which provide a port for inserting an exhaust gas analyzer. Those are bigger holes and I would not run the bike with the plugs removed. I noticed my GF's SF has one of those bungs in the 4 barrel exh.
Cheers Jim
I will be getting an aftermarket slip on soon,just wondered if running with them out would lean it out.It does not seem to effect the performance.
#4
05-09-2011, 11:04 PM
I know what plugs you are talking about. I run with the rear most one removed. I left the front one on.
The front one is a water drain plug. Not sure what the rear one does but it is letting more exhaust out. I would say it adds about 50% more air out then just the stock exhaust hole. I can plug the stock hole with the rear plug removed and it will still run so I know it is allowing more exhaust out. If you have the stock jetting you might want to leave it in since they run lean from the factory.
The front one is a water drain plug. Not sure what the rear one does but it is letting more exhaust out. I would say it adds about 50% more air out then just the stock exhaust hole. I can plug the stock hole with the rear plug removed and it will still run so I know it is allowing more exhaust out. If you have the stock jetting you might want to leave it in since they run lean from the factory.
#6
05-10-2011, 02:30 AM
Rtfm
In the manual it says you are supposed to pull those plugs and run the bike to remove junk that has collected in the muffler. I don't think it will hurt a thing to run with them out. I don't think it will actually make the bike run any better in or out.
SO whatever you like is good.
David
SO whatever you like is good.
David
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