CR too loud

[Greasyrider]

I have a 1975 CR 250 that runs great, but if I fire it up in my yard or test it out going up and down the road in front of my house the neighbors will hate me. Any thoughts on how you can tone down the db level without ruining the looks or performance of the bike? I pulled the silencer out of the pipe and it seemed to have plenty of fiberglass packing. But it's still really loud. Are there any aftermarket silencers out there that work better? Were the WR pipes much quieter? I'm sure they at least had spark arrestors...

 

[ruwfo]

Your bike has internal non removable silencer doesn't it??, if that's true your looking at a whole WR pipe. But here's what i've done
on CBX Street bike i had a few years back, that was way too loud. Go to you local hardware store & look in the plumbing department for shower curtain rod mounting rings, by luck they fit right inside my silencers but had a smaller diameter inside hole so they restricted the back pressure more & quieted it down enough, I put them in front & back of the baffle. I know it's 4 stroke, but the principle is the same, you may find a plumbling fitting they does the same.

Husky John

 

[Greasyrider]

Your bike has internal non removable silencer doesn't it??, if that's true your looking at a whole WR pipe. But here's what i've done
on CBX Street bike i had a few years back, that was way too loud. Go to you local hardware store & look in the plumbing department for shower curtain rod mounting rings, by luck they fit right inside my silencers but had a smaller diameter inside hole so they restricted the back pressure more & quieted it down enough, I put them in front & back of the baffle. I know it's 4 stroke, but the principle is the same, you may find a plumbling fitting they does the same.

Husky John

 

[Greasyrider]

Thanks John! The CR pipe does have a removeable silencer - a snap ring holds it in there. Maybe I can fit at least one of the restrictor rings in there in from of the snap ring. I'll give it a try! Do you know if the spark arrestor silencer in the WR pipe is interchangeable with the one in a CR?

 

[Matt Cummings]

I Wish My Neighbors Would Rip Two Stokes Around. Sound Of Sweet Music! Bigger The Better.

My CR Isn't All That Loud And It Lacks The Factory Silencer On The End Of The Pipe. I Plan On Buying This http://www.vintagehusky.com/products/exhaust/e0001.htm To Quiet I Down Anyways.

I Have No Idea If It's Better Than What You Have Tho.

 

[ruwfo]

Thanks John! The CR pipe does have a removeable silencer - a snap ring holds it in there. Maybe I can fit at least one of the restrictor rings in there in from of the snap ring. I'll give it a try! Do you know if the spark arrestor silencer in the WR pipe is interchangeable with the one in a CR?

Not sure if the CR one & WR are interchangeable, but yes if you remove the snap ring & take out the baffle you should be able to make some kind
of added reducing noise rings.

 

[Mike-AK]

I have a 1975 CR 250 that runs great, but if I fire it up in my yard or test it out going up and down the road in front of my house the neighbors will hate me. Any thoughts on how you can tone down the db level without ruining the looks or performance of the bike? I pulled the silencer out of the pipe and it seemed to have plenty of fiberglass packing. But it's still really loud. Are there any aftermarket silencers out there that work better? Were the WR pipes much quieter? I'm sure they at least had spark arrestors...

You can put your hand over the end of the tailpipe until you get down the block a ways.

 

[Greasyrider]

You can put your hand over the end of the tailpipe until you get down the block a ways.

I remember using the chrome Volkswagen exhaust stingers to quiet expansion chambers back in the 70s, maybe I can figure a way to temporarily attach one without welding or drilling the stock chamber. Maybe use a large metal washer instead of a shower curtain ring, and put it behind the snap ring with the stinger welded to it and extending through the snap ring? If it works i'll take a picture and post it.

 

[justintendo]

You can put your hand over the end of the tailpipe until you get down the block a ways.

thats hilarious...my friends and i used to do that sneaking out of town riding the trails to the woods...it really does work, lol

 

[SteveJ]

I Wish My Neighbors Would Rip Two Stokes Around. Sound Of Sweet Music! Bigger The Better.

My CR Isn't All That Loud And It Lacks The Factory Silencer On The End Of The Pipe. I Plan On Buying This http://www.vintagehusky.com/products/exhaust/e0001.htm To Quiet I Down Anyways.

I Have No Idea If It's Better Than What You Have Tho.

Just installed one on my '70 400CR. About all it does is take the "bite" out of the exhaust, helps some, but still louder than my Honda CR500R with factory silencer. Won't win you any good neighbor awards. Geez, we raced these bikes brand new without silencers and thought it was okay, I must be getting old.

 

[firecrackerkid]

You can put your hand over the end of the tailpipe until you get down the block a ways.

Used to stick a garden hose in the tailpipe and then pull it out at the edge of town. That's rocket science for a 14 year old.

 

[Bryll]

You have to start the bike more often, so the neighbours get used to it

 

[adam6402]

I start my bikes about once a week and spin it around the front yard, then let it sit and idle for a few. Evey once is a while I take it on the street for a short burst. But always do it between around 11AM and 3PM.

 

[mike328]

I Wish My Neighbors Would Rip Two Stokes Around. Sound Of Sweet Music! Bigger The Better.

My CR Isn't All That Loud And It Lacks The Factory Silencer On The End Of The Pipe. I Plan On Buying This http://www.vintagehusky.com/products/exhaust/e0001.htm To Quiet I Down Anyways.

I Have No Idea If It's Better Than What You Have Tho.

I have this 'silencer' on my 400....sorry but it is nothing more than an open muffler, like a glass pack... I had to modify it to get a spark arrestor on it... & its still loud

 

[84scrambler]

Repack the silencer, If its been longer than a year or two it needs it any way. May try welding a down spout at the end . You could try header wrap from the auto parts store ( it comes in black now ) and wrap the expansion chamber from the head port to the silencer. Alot of the ting ting noise actually come from the expansion chamber itself . My 87 xc has a long muffler on it and it is really nice and quiet compared to my 85 wr with the factory black spark arrestor.

 

[Mike-AK]

Used to stick a garden hose in the tailpipe and then pull it out at the edge of town. That's rocket science for a 14 year old.

Nowadays it takes a doctor for that.