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#53137 Helmut (User) If you can't be young be immature Expert Boarder Posts: 421 Exhaust question 4 Years, 6 Months ago   Just wondering how the baffle reallly works in the aftermarket exhaust. Does the exhaust flow out the middle and the baffle deadens the sound or does it flow through the baffle material wrap?   Logged       The administrator has disabled public write access. #53143 Pop Rivet (User) Platinum Boarder Posts: 3123 Re:Exhaust question 4 Years, 6 Months ago   Helmut wrote: Just wondering how the baffle reallly works in the aftermarket exhaust. Does the exhaust flow out the middle and the baffle deadens the sound or does it flow through the baffle material wrap? The exhaust flows thru the middle and is disturbed by the louvres and the sound is deadened by the wrap...   Logged     2009 Ultra Classic HD...2005 Silverado Road Star MY WEBSITE HOG HEAVEN Listen to the Road Star   The administrator has disabled public write access. #53145 DocShadow (Admin) Hmmmm .... send beer Admin Posts: 17615 Re:Exhaust question 4 Years, 6 Months ago   Depends on the pipe. For duals, eg. longshots, there is not enough room inside the pipe so it's as Pop described above. For the V&H Propoips, the baffle is a tube with the leading edge capped and holes in the side of the baffle. The gases flow sideways through the baffle. You can make them quieter by wrapping baffle material around the baffle which means the gases flow through the baffle material. Doc   Logged     My Bike Website   The administrator has disabled public write access. #53207 Helmut (User) If you can't be young be immature Expert Boarder Posts: 421 Re:Exhaust question 4 Years, 6 Months ago   Will wrapping more material around them cause a drop in performance or cause serious backpressure?   Logged       The administrator has disabled public write access. #53213 DocShadow (Admin) Hmmmm .... send beer Admin Posts: 17615 Re:Exhaust question 4 Years, 6 Months ago   Depends on the baffle style. For one where the gases flow through the wrap then it depends how much you wrap ... but yes. The straight thru baffles .... no. The real baffle warp is quite dense so one layer is usually sufficient to quiet the pipes down. Pink insulation is not a substitute. Doc   Logged     My Bike Website   The administrator has disabled public write access. #53229 StarGuy (User) Fresh Boarder Posts: 25 Re:Exhaust question 4 Years, 6 Months ago   So where can you find 'real' baffle wrap and is one type better than another? Also, if you decide to go back to naked baffles, does wrapping them cause any problems? Thanks. SG   Logged     The administrator has disabled public write access. #53241 DocShadow (Admin) Hmmmm .... send beer Admin Posts: 17615 Re:Exhaust question 4 Years, 6 Months ago   Try the dealer. Dirt bike shops seem to have them. It's kinda grey/brown in color ... very dense looking. You don't need to take the wrap out ... just leave it in as it eventually blows out. Doc   Logged     My Bike Website   The administrator has disabled public write access. #53251 Greysnake (User) I'm so far behind I think I'm first. Platinum Boarder Posts: 7907 Re:Exhaust question 4 Years, 6 Months ago   What Doc said, and you can put a couple of rounds of masking tape around it to hold it in place while you put it back in.   Logged     06 Midnight Silverado *nothing shines like a star*   The administrator has disabled public write access. #53279 Curt (Moderator) Never to old to ride! Moderator Posts: 12507 Re:Exhaust question 4 Years, 6 Months ago   In my experamenting with baffles the size of the exit outlet also controls the sound. I am working on a set of baffles now that are straight thru that goes from the 1 3/4ID header pipe to a 2 1/2 x 8 inch long straight thru pipe then back to a 1 3/4 in exit pipe. The 2 1/2 gives it a deep tone and acts as an echo chamber then the 1 3/4 exit tones the loudness down. Keep in mind the smaller the pipe the higher the velocity of the gases the larger the pipe the higher the pressure of the gases.   Logged     My Site Black Ice is Shiny, Black Ice is Deadly, Ya Wanna Ride My BlackIce?   The administrator has disabled public write access. #53286 Big Bear (Moderator) Who loves you , Baby? Moderator Posts: 6997 Re:Exhaust question 4 Years, 6 Months ago   I use FMF four stroke silencer repacking, works like a charm. Larger shops that carry dirt bikes should have it in stock. One package should last you some time, and it's only around 10 bucks. BB   Logged       The administrator has disabled public write access.

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