muffler packing

My friend rides a KX450F and he says that after 6 weeks of having the bike it got really loud and he had to repack it becuase he burned all the packing away. I've had my for almost 2 years on my 250f and it hasn't gotten any louder.

He does hall the mail around the track and would smoke me any day. But can you really burn all the packing out within 6 weeks!?

If its junk packing thats probably not really meant for a bike. How often does he ride, after 25 to 30 hours somethimes you do need to repack them.

i would not doubt it at all, some people repack every 10 houres

Thats not too abnormal. If it had cheap packing and he rides alot, i wouldnt doubt it.

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