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  1. #1
    Clunked into first gear
    My Bike(s)
    2006 Yamaha Royal Star Tour Deluxe
    Location
    Arizona
    Posts
    200

    Wrapping baffles with fiberglass

    My aftermarket pipes sound really nice but they're just a bit loud. I'm trying to stay friends with my neigbors so I thought I might try wrapping the baffles with some fiberglass. Anyone ever done that? Any hints?

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  3. #2
    M-J Lifetime Achievement Award
    My Bike(s)
    1980 Yamaha XS850 - being dismantled; 1999 Kawaski Concours
    Location
    Washington County, WI
    Posts
    13,275
    I've heard of steel wool before, but not fiberglass. What brand do you have?

    Sometimes you can buy baffles to serve just this purpose. If you are lucky, the brand you have might have something.

    I would be more intrigued with the possibility of carbon fiber.

  4. #3
    Just Won't Go Away !
    My Bike(s)
    several
    Location
    Buford, GA
    Posts
    5,197
    Yes, fiberglass muffler wrap will quite down the exhaust. Get the 1/4 inch thick sheets of 1300-degree fiberglass, and add one wrap at a time around the baffles until you are happy with the sound.

    Do not use stainless steel, as it is flammable.
    You MUST obey the pug dog!


  5. #4
    Clunked into first gear
    My Bike(s)
    2006 Yamaha Royal Star Tour Deluxe
    Location
    Arizona
    Posts
    200
    Someone in another forum did recommend steel wool but I've done some powerfull pyrotechnics with that stuff in my old army days so I think I'll pass on that idea.

    I bought a pack of FMF 4 Stroke Muffler Packing.

    Funny thing is I just noticed on the package it says to repack the muffler every 20 to 30 hours!

  6. #5
    M-J Lifetime Achievement Award
    My Bike(s)
    1980 Yamaha XS850 - being dismantled; 1999 Kawaski Concours
    Location
    Washington County, WI
    Posts
    13,275
    Funny thing is I just noticed on the package it says to repack the muffler every 20 to 30 hours!

  7. #6
    M-J Lifetime Achievement Award
    My Bike(s)
    1980 Yamaha XS850 - being dismantled; 1999 Kawaski Concours
    Location
    Washington County, WI
    Posts
    13,275
    Funny thing is I just noticed on the package it says to repack the muffler every 20 to 30 hours!
    That sounds like some premium stuff there. I would think something like this is derated by 50% or more just to be on the safe side. Prolly because the mfg figures some nut will fire up the bike (on a stand) for 30 hrs. just to see if it holds up. In regular riding, once a year should be fine. Although I would check it from time to time to see how it's holding up.

    Is the consistency of this stuff anything like fiberglass?

  8. #7
    Clunked into first gear
    My Bike(s)
    2006 Yamaha Royal Star Tour Deluxe
    Location
    Arizona
    Posts
    200
    Yes, it's a fibefrglass matt about 3/4 inch thick, fluffy and yellowish in color.

    I average about 1,500 miles a month so I hope you're right.

  9. #8
    M-J Lifetime Achievement Award
    My Bike(s)
    1980 Yamaha XS850 - being dismantled; 1999 Kawaski Concours
    Location
    Washington County, WI
    Posts
    13,275
    Sounds like fiberglass treated with flame retardent material.

    You have a Royal star, so I'm guessing (guessing mind you) that your exhaust gases aren't quite as hot as those of a modern say 1200 Suzuki Bandit cranking ridiculous horsepower and some 10 k rev/min.

    Now that relatively cheap hi temp digital thermometers are available ($100 and it's non contact, so you just point and shoot) you could buy one, check the temp and write back to the mfg of the insulation stuff. I'm betting a lower compression slower revving cruiser motor has cooler exhaust.

    good luck

  10. #9
    Top Gear ! Full Throttle!
    My Bike(s)
    01 Bandit 1200
    Location
    Elgin, IL, US
    Posts
    5,383
    Frack your neighbors. If their windows are still intact then they have nothing to complain about
    I am lurking. I am likely to be eaten by a grue.




  11. #10
    Clunked into first gear
    My Bike(s)
    2006 Yamaha Royal Star Tour Deluxe
    Location
    Arizona
    Posts
    200
    LOL, that's ecxactly what my buds are saying. Anyway, I packed them and they now have a deep rumble and I like them a lot better. The thing is basically 2 straight 3" pipes with a 12" long baffle in each pipe. Remember that this is a 4 cylinder. It sounds like a hopped up 350 Chevy with Cherry Bombs if anyone remembers what used to sound like.
    Last edited by azkober; 02-15-2007 at 04:40 PM.

  12. #11
    M-J Lifetime Achievement Award
    My Bike(s)
    1980 Yamaha XS850 - being dismantled; 1999 Kawaski Concours
    Location
    Washington County, WI
    Posts
    13,275
    and another unintentional plus, a bit more back pressure will keep the exhaust valves from getting cooked. Not that you'll drive the bike that far. There will be another bike that will catch your eye by then.

  13. #12
    Clunked into first gear
    My Bike(s)
    2006 Yamaha Royal Star Tour Deluxe
    Location
    Arizona
    Posts
    200
    I dunno, this yammie came with a 5 year unlimited mileage warranty and I intend to see just how many miles I can put on it before that runs out.

  14. #13
    Clunked into first gear
    My Bike(s)
    2000 yz125 race prepped
    Location
    bentonville, arkansas, us
    Posts
    230
    the 20-30 hrs replacement figure is because the packing is meant for smaller dirtbike engines that require more backpressure to make max hp. the packing wears out/burns up and you lose a little pull. on your bike you probably shouldn't need to change it any more often then when it starts getting louder than you like.

  15. #14
    Clunked into first gear
    My Bike(s)
    2006 Yamaha Royal Star Tour Deluxe
    Location
    Arizona
    Posts
    200
    I was sorta hoping that would be the case. Although it isn't difficult it is a messy job. Found out that a toilet brush is perfect for cleaning the soot out of the tail pipe ...

  16. #15
    M-J Lifetime Achievement Award
    My Bike(s)
    1980 Yamaha XS850 - being dismantled; 1999 Kawaski Concours
    Location
    Washington County, WI
    Posts
    13,275
    azkober
    I dunno, this yammie came with a 5 year unlimited mileage warranty and I intend to see just how many miles I can put on it before that runs out.
    A most excellent plan. Let's see, my 5 highest mileage years would be over 35 k, and that was without a warranty. With a warranty, figure 40 k.

    Drive the snot out of it.


 

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