Muffler broke in half while riding on flat road
- Thread starter geoldr
- Start date
The body of the muffler needs to be strapped to the bicycle frame.
Be happy that exhaust studs did not break off of the cylinder.
Similar to the bracket in this pic, I made one out of plumber's tape.
http://livefastmotors.com/component...ge/product/Standard_Bronze__4b1195a91412c.jpg
Be happy that exhaust studs did not break off of the cylinder.
Similar to the bracket in this pic, I made one out of plumber's tape.
http://livefastmotors.com/component...ge/product/Standard_Bronze__4b1195a91412c.jpg
The muffler should be attached to the frame.
That's why they give you a muffler bracket in the kit.
That's why they give you a muffler bracket in the kit.
Brutal geoldr, I'll bet the neighbors love you now 
I finally used my bracket, once I figured out you need to bend the middle of it when its mounted on the exhaust. Mine has almost 90 degree bend. I always thought "This's too long, I'm not using it..." lol.
I finally used my bracket, once I figured out you need to bend the middle of it when its mounted on the exhaust. Mine has almost 90 degree bend. I always thought "This's too long, I'm not using it..." lol.
Use p tape to affix it.
Looks like you had a pretty bad exhaust manifold leak - would that be a more severe source of excess vibration leading to what happened here?
Looks like you had a pretty bad exhaust manifold leak - would that be a more severe source of excess vibration leading to what happened here?
A rattling muffler contributes to uneven cylinder wear and the cylinder head bolts loosening up. That muffler can resonate a vibration that can be felt through the bike. Just rev one of these motors up a good rap with the clutch disengaged standing by the bike and watch one of these mufflers rattle. They move a lot!
Wow, first time I have seen one completely fall off at the top weld. Normally, the guts just fall out on mine, lol
Gives ya a chance to make it a poo-poo.
Every one is right. The muffler wiggling around does add an amazing amount of vibration. Put your foot on it at WOT. The thing is doing the shake down boogie as ya ride!
Gives ya a chance to make it a poo-poo.
Every one is right. The muffler wiggling around does add an amazing amount of vibration. Put your foot on it at WOT. The thing is doing the shake down boogie as ya ride!
Was it made in china? just kidding, I think most members will agree vibration is a problem. anything hanging needs support also all bolts should be locktighted or double nutted
Unless I'm wrong it looks like you have some kind of rubber under that rear engine mount. If so that's another reason you vibrated the muffler apart. Couple a questionable weld with severe vibration from an improperly mounted engine and you're asking for trouble. Mount the engine solid to the frame and fabricate a muffler clamp of some sort.
I agree also that it appears you have an exhaust leak at the cylinder. If that manifold was loose that certainly contributed to the failure.
Good luck. Keep us informed.
Tom
I agree also that it appears you have an exhaust leak at the cylinder. If that manifold was loose that certainly contributed to the failure.
Good luck. Keep us informed.
Tom
Ok, the red stuff on the exhaust is a high temperature sealant that I use with this aluminum gasket that I have. Because the part that connects to the motor wasnt flat, I had to use this sealant to seal it up. Although I think it wasn't fully sealed, because at very high revs, sometimes hot liquids would hit my leg. Only happened like once, but that's prolly because it was vibrating so much. What can I do to fix this?
I ordered a new black muffler for 20 bucks.
"exhaust leak at the cylinder" what exactly does that mean? That it wasn't sealed on right?
And on the actual motor mount, there is no rubber. It's attached directly to the frame of the bike.
I ordered a new black muffler for 20 bucks.
"exhaust leak at the cylinder" what exactly does that mean? That it wasn't sealed on right?
And on the actual motor mount, there is no rubber. It's attached directly to the frame of the bike.
Young man, you can have all the fun you want below 75bizillion rpm lol.Wheres the fun in that
Attached is the other stuff I have in my kit. There was something else, it was probably the muffler strap thing, but I have no idea where it is
I also don't know what to do with these two things either. Never used them during setup.
How can I go about fabricating a muffler strap?
Also, when I was taking off the broken muffler piece, one of the things that holds the bolt unscrewed. Can I just screw it back in with some locktite? Or is it broken?
I also don't know what to do with these two things either. Never used them during setup.
How can I go about fabricating a muffler strap?
Also, when I was taking off the broken muffler piece, one of the things that holds the bolt unscrewed. Can I just screw it back in with some locktite? Or is it broken?
Attachments
The exhaust header pipe has a nasty habit of loosening up from where it's bolted to the head, especially after it's been run a while the first time. Some types of exhaust gaskets are worse about it than others, but in almost every case you have to retorque the exhaust bolts at least once. Head bolts too.