R/K Slip-on Question

[Kregerdoodle]

Ok, I have a set of R/K slash cut slip-ons, some one on here wrote about drilling out the front baffel.... question is what did you use to drill it out? it is about a foot down in the pipe... Help please!! I don`t mean to beat a dead Horse, as I know it is probably posted on here some place..

 

 

Thanks for any help!

 

K

[lockdoc]

First I'd go ahead and install them and see how you like them stock.

If you want a bit more sound just get a long spike and pierce the front baffle.

[royalstarjac]

Go to Ace hardware and get a long 1/2" drill. They make one long enough to reach the baffle. It's about 14" long. The one I have has a turned down shank to fit a 3/8" drill. -Jack

[BOO]

Yeah a 12" extenion with and an inch and a quarter hole saw will do the job very nice.

I drilled mine out all the way from both ends, not really that loud but has a little bite.

If you don't like the sound a new set of HD's are cheap.

Good luck,

Jerry

[royalstarjac]

Some more info:

Look inside the muffs from the entrance end with a light. You will see a large solid donut shaped solid baffle that holds a perforated tube in the center of the muffler. The large donut baffle has a couple small holes drilled opposite each other about half way between the center tube and the outside skin of the muff. Use a long shanked half inch metal bit and the two small holes as pilots to drill two half inch holes in the large donut baffle. Then carefully drill two more half inch holes opposite the first two, being very careful not to allow the bit to wander (you are drilling at a bit of an angle!) and penetrate the outside skin of the muff. That’s level one -- four half inch holes in the large solid baffle, accessed from the entrance of the muffler.

 

I suggest you put about 500 miles on them before you form an opinion on whether they're loud enough or not. If they were taken of the donor bike before they were broken in they will burn in and get louder over time. Give them a while before you decide, then if you want you can drill them out some more with the 11/8" hole saw as was mentioned above.-Jack

[Pilot]

I drilled straight thru the middle baffle the perforated tube in the center of the muffler. Not the outer doughnut baffle people here are talking about. I used a 1/2" bit about 8 inches long with an extension. This baffle is the center hole you see when looking at the entrance or exhaust ends of the muffler. You will have to drill thru 2 sections located about 10 inches from both ends. When you use the slash cuts it is very difficult to drill the exhaust outer baffle because of the slant, the drill wants to keep wandering and trying to use a center punch is just as hard. I ended up drilling 3 holes in the center tube. You can now see straight thru the center of the muffler. I tried to take a picture of it but they just don't turn out.

 

Others here are talking about drilling the outer doughnut baffle. If you look into the muffler from the entrance side (the end that attaches to the exhaust) you will see the doughnut baffle they are talking about. This is easy to identify because it already has (2) 1/4 inch holes in it. These 2 holes are the first holes to enlarge they are 180 degrees out from one another. If you want more sound then drill 2 more holes 90 degress out from the existing holes. Hope this does not confuse you.

[WIKD]

Sorry to hijack this thread but I drilled mine out and still want something louder/deeper without being obnoxious. Any suggestions?

[royalstarjac]

Sorry to hijack this thread but I drilled mine out and still want something louder/deeper without being obnoxious. Any suggestions?

 

 

How far did you drill them? You can drill them to 4 different levels. Did you drill out the back with an 1 1/8" hole saw? On the Venturers.org site there is a description of the 4 levels and how to do them. Look in the tech library. The authors name is "pudge".-Jack

[Kregerdoodle]

I drilled straight thru the middle baffle the perforated tube in the center of the muffler. Not the outer doughnut baffle people here are talking about. I used a 1/2" bit about 8 inches long with an extension. This baffle is the center hole you see when looking at the entrance or exhaust ends of the muffler. You will have to drill thru 2 sections located about 10 inches from both ends. When you use the slash cuts it is very difficult to drill the exhaust outer baffle because of the slant, the drill wants to keep wandering and trying to use a center punch is just as hard. I ended up drilling 3 holes in the center tube. You can now see straight thru the center of the muffler. I tried to take a picture of it but they just don't turn out.

 

Others here are talking about drilling the outer doughnut baffle. If you look into the muffler from the entrance side (the end that attaches to the exhaust) you will see the doughnut baffle they are talking about. This is easy to identify because it already has (2) 1/4 inch holes in it. These 2 holes are the first holes to enlarge they are 180 degrees out from one another. If you want more sound then drill 2 more holes 90 degress out from the existing holes. Hope this does not confuse you.

 

 

 

Thanks!! I will give this a try...

[WIKD]

How far did you drill them? You can drill them to 4 different levels. Did you drill out the back with an 1 1/8" hole saw? On the Venturers.org site there is a description of the 4 levels and how to do them. Look in the tech library. The authors name is "pudge".-Jack

 

They are completely drilled out. I need to replace them but I don't want loud. Just louder and deeper than a set of RK's drilled out.

[Squidley]

They are completely drilled out. I need to replace them but I don't want loud. Just louder and deeper than a set of RK's drilled out.

 

 

They will get a bit throatier after some of the baffling wears out, but the only other option would be a different set of mufflers. The Sampsons are a definite difference, and can be a bit loud, but not terrible.