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Old 03-30-2012, 10:33 AM   #1
lake_harley OP
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2-Stroke Pipe Question

Does the exhaust system on a 2-Stroke ever need to be cleaned out? I'm tinkering with a couple F7 175 Kawasaki enduros ('74 and '75 if I recall correctly from the titles). One of the pipes that I have off seems a lot lighter than the other and just wonder if they build up deposits, similar to the combustion chamber, that should be cleaned out? If yes, then how or what do you do or use to clean them?

I've had a few 2-stroke bikes over the years, but none that were this "mature", and I never kept them all that long.

Thanks, in advance.

Lynn
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Old 03-30-2012, 10:38 AM   #2
JeffS77
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Stick a torch in and let her rip... Burn it out
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Old 03-30-2012, 10:55 AM   #3
lake_harley OP
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Hmmm. Propane, Oxy/Acetylene or?? Since I haven't done this before, will it "light off" and continue to burn and then the ashes can be tapped out?

Thanks

Lynn
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Old 03-30-2012, 12:28 PM   #4
gloud
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Yes they need to be cleaned out if they are that old. Any torch should get them going do it outside as it will stink. You can also use oven cleaner I have been told but you need to be careful of the lye.
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Old 03-30-2012, 12:50 PM   #5
brendonb11
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absolutely they need to be cleaned out!
Torch and scrape (if you can get a brush in there). Some older models have baffles in the end of the pipes that you can yank out as well...
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Old 03-30-2012, 01:19 PM   #6
anotherguy
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Yank the baffle (if you can) clean it. I like to heat the pipe and stick a broken cable in a drill,insert cable in pipe (after heating/cooling) and let the cable knock as much carbon loose as possible. Do that from both ends if possible. Empty the debris and repeat.
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Old 03-30-2012, 11:37 PM   #7
Hunsta
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It will do wonders for your bike. However your neighbours will hate you for the tons of smoke you will create.. Just did mine. Oxy torch and compressed air. What an environmental freak show.
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Old 03-31-2012, 05:41 AM   #8
lake_harley OP
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Quote:
Originally Posted by Hunsta View Post
It will do wonders for your bike. However your neighbours will hate you for the tons of smoke you will create.. Just did mine. Oxy torch and compressed air. What an environmental freak show.
Sort of a mini flue fire maybe? Now you have me looking forward to it!

Lynn
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Old 03-31-2012, 02:28 PM   #9
lake_harley OP
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Well, I used a propane torch from the "engine" end of the pipe. Let it burn in that end for quite a while. Got some smoke, but not as dramatic as I had actually hoped for. I wonder, since all of the bikes had been sitting quite a while, could everything sort of dried up that it wasn't all that flamable anymore? This 2-stroke stuff is rather new to me. I did manage to get a layer of soot out of the curved end of the pipe, so I guess at least I did some good. Anyone put any "accelerant" in the pipe, like gas, to get it burning? You're probably thinking now, "Man, I'm glad I'm not his neighbor!"

Lynn
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Old 03-31-2012, 03:22 PM   #10
Euromad
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Putting gas in the pipe prolly give you an unexpected BANG
you may blow the pipe apart and give yourself a reason for a hearing aid and plastic surgery
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Old 03-31-2012, 07:42 PM   #11
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Yeah, I'll probably search for dramatic effects elsewhere. Hearing aids and plastic surgery would cut into my motorcycle habit budget too much

Lynn
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Old 03-31-2012, 07:45 PM   #12
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I just throw them in the trash barrel and light it.
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