You can probably get a set of stock mufflers for a song from a dealer because of all the people who come in and get the aftermarket sets.

 

Thanks Bounty hunter. That was quick. I will look into that option.

 

Fleabay sells a lot of used pipes too.

Ask and ye shall receive....

http://www.ebay.com/itm/2001-Yamaha...tock-/290610271563?pt=Motorcycles_Parts_Accessories&vxp=mtr&hash=item43a9b8d54b

 

Thanks bountyhunter. I have looked at e-bay but I am working on a tight budget and am trying to do this as inexpensively as possible, we are sending our daughter back east this spring to study glass art creation to the tune of $2400. I am hoping to make a set of low cost baffles that will work well until I can afford better pipes. That is the reason for the request for a science lesson.

 

The only scientific knowledge I have on baffles relates to the compensators on the end of a pistol barrel.

 

I'd just wear the earplugs. If your ears are ringing at the end of a ride, you're already doing irreversible damage to your hearing. Wind noise is another HUGE contributor to hearing damage with motorcyclists. My hearing is really, really precious to me; I just refuse to be one of those old men that cant hear anything and even with their hearing aid have to have everything repeated.

Your baffle idea may fix the bike's noise, but theres all the other noise that will, over time, destroy your hearing...

 

I'd just wear the earplugs. If your ears are ringing at the end of a ride, you're already doing irreversible damage to your hearing. Wind noise is another HUGE contributor to hearing damage with motorcyclists. My hearing is really, really precious to me; I just refuse to be one of those old men that cant hear anything and even with their hearing aid have to have everything repeated...

Heed the word. Too late for my old ears, but take care of yours.

 

I bought a set of stock pipes for $75 from a guy on a VTX specific site to drill out. That way if I jacked them up I still had the original set to fall back on.

 

What's the inside diameter of your pipes?

 

JC Whitney used to sell cheap baffles that slide inside a pipe.

http://www.jcwhitney.com/motorcycle-baffles/c14675j1s17.jcwx

 

Eye_m_no_angel, the dimensions as best as I can measure them without a caliper is 2 5/32" ID and 2 1/4" OD.

Sirgilbert357, I used to use ear plugs when riding my old Sabre due to the wind noise but that bike did not have a wind shield. This bike has a wind shield and I do not get the wind hitting my helmet even on the windiest days. I have considered using them again but I when I do I feel as though I am missing out on potentially important traffic sounds.

The idea for the baffles is actually two fold. In addition to the noise level, according to what I have been reading, the engine runs better and may last longer with a bit of back pressure. So if I just add the earplugs for my hearing I will not be addressing the issue of back pressure.

 

You are correct in that it runs better with some "back pressure." Also, if it was not re-jetted when the baffles were taken out it might be running lean, which means running a little hot, which could cause damage to the engine.

If you can't find a cheap set of baffles through JC Whitney or JP Cycles, you can always weld a fender washer on to a 1/4 bolt and mount that up through a hole in the back side of a pipe. It won't do much for the noise but it will give you enough back pressure. (Old dirt bike trick)