Towards the end of last week, my bike started developing a whistle inside the muffler. It got worse, and now it's VERY annoying.
Last night I've removed the muffler, gave it a good shake and nothing's lose inside. I am guessing the baffle somehow is making the noise. Maybe a crack or a tweaked. It probably deteriorated inside with use.

At least now I have a good reason to buy a new pipe. Thou, Ima have to wait until someone comes to visit, to smuggle it to me.

...But still sucks I have to ride with that whistle...thing sounds more like an old VW.

 

The KLR650 develops something called the "Tweety." I wonder if it is a similar issue?

 

No Scott...that's just the nickname everyone gave you when you bought a KLR.

Yeah, sounds like the infamous KLR650 "tweety", but Malves' deal may be something caused more by rust and time. Many of the KLR's developed it rather quickly. Still, probably all based in the same issue of something getting deposited in just the right place to make that funky noise. I've been riding with someone with a KLR making tweety, and it's a funny noise. I even thought it might be something close to that sound some of us have heard on our KLX that we were talking about recently on another post. However, many of us with the sound have totally different exhaust systems, and it's not as consistent as a good tweety.

 

maybe it might help people to post any problems...maintenance done to their klx since purchase...rough estimates of miles from memory...2009 klx250sf...k&n, hmf, powerbomb, scotts, dj jet, etc...13 months and 12,000 miles...

500 mile oil/filter change
1,100 miles oil/filter change
2,500 miles kickstand kill switch failure (won't start and towed)
4,000 miles oil/filter change
7,000 milles oil/stainless steel oil filter change
8,600 valve inspection/valve shims replaced (out of spec)
9,000 miles rear tire change
10,000 miles front tire change
10,500 miles oil change/stainless steel oil filter cleaned
11,600 miles clutch cable frayed (limp'd home, stalling at every stop and replaced cable at home)

 

Yeah, Iīve seen KLR show up on google when searching for the problem. I'm also thinking it's a combination of rust, time and use.
I said inside the muffler, but the whistle comes on right at the tip of the "straw" (pipe). If I put my finger to close 1/3 of the opening, the noise goes away. I've used a flashlight to look inside of it and everything looks normal, nothing bent or cracked. I really have no clue.

Guess I'll have to wait until I can replace it.

 

I really havenīt had any other problems/issues with the bike. All parts I've replaced were because of maintenance or for the extra "bling". Little bike is a little tank.

 

me too..i guess beside the kickstand kill switch failure..everything i listed above is just maintenance items...damn..klx250 is a solid moto!