blew a hole in the exhaust...(stainless steel)

[impression]

blew a hole in the exhaust...(stainless steel) ( now fixed ) with Pics

Gday all, well today i was on a 70km/h road and was going down a slight hill about a 15 degree slope. ( keeping up with traffic i assume i was doing 60-70km/h approximately ( i don't have a speedo )

and when i got down the bottom another 200m later i hear this bang and pop sound.

I assumed i blew the intake gasket again... but i didnt....

I blew a chunk out of the exhaust pipe, where the tether for the rear end is.

i'll attach something for this tomorrow

 

[ddesens]

That is an easy weld up job. Sucks it happened though.

 

[kevinkrg6]

Geez, expansion chamber? And how does this happen?

 

[impression]

Geez, expansion chamber? And how does this happen?

70km/h on a slight downhill on a 41t sprocket....

pretty high RPM and a lot of fuel/air pressure inside the pipe

 

[LS614]

That is just odd, are you sure it blew out and didn't just vibrate out???

 

[impression]

well i was screaming down a nice strathc of road then there was this 'BANG' i thought i blew a gasket, i slowed down and stopped on the side of the road and inspected....

 

[decoherence]

i would think any dependable dealer would exchange it. it looks like a manufacturing problem.

 

[impression]

well i've just patched the hole and put on the new muffler at the end

just got to weld on the tether attachments

 

[impression]

ok so here's where we sit now.

I cleaned up the hole and welded it shut... I know it's messy but i only have an arc welder, no mig or tig and it's quite hard and you kinda blow the hole bigger if you're not careful with .25mm thick steel

then after that i put the new muffler on and got that welded into place also put on a new "tether" to the bike from the exhaust... this time it's welded to a thicker park of the exhaust.

the tether is only half welded on as i ran out of welding rods, i should get some tomorrow. and it's time to test tide, if all is well we file back and paint

 

[impression]

well, the new muffler albeit twice the volume ( capacity) is quieter, however i have lost half my engine's power

 

[impression]

ok go here for update.

http://motorbicycling.com/f51/modifying-exhaust-56k-no-32572.htmlzpt