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Old 04-18-2007, 04:38 PM
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Moto Pro circuit exhaust cleaning?

I have a factory finish pro circuit exhaust and the fatty pipe is all discolored and I was wondering if the pipe can be restored to the factory finish. The pipe was made in 93 according to the tag and it only has one small dent in it. I would like to clean it up and keep it on the pipe, it makes good power.
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Old 04-18-2007, 06:16 PM
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Default Re: Pro circuit exhaust cleaning?

Im not sure if theres a way to take the discolor off the pipe, but if there is LMK! my fmf fatty is discolored near where it connects to the cylinder.
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Old 04-18-2007, 06:58 PM
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Usflag Re: Pro circuit exhaust cleaning?

Use some WD-40 and a Scotchbrite pad.

Bill
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Old 04-21-2007, 09:15 AM
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Old 01-01-2009, 12:07 AM
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After you clean them will they turn colors like blue and purple and gold from riding it hard?
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Old 01-05-2009, 04:55 PM
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How do you clean the inside out?? to get the carbon build up out?
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Old 09-19-2009, 02:33 PM
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The KTM pipe looks pretty good. Is Motip available here in the U.S.? If so, can someone advise where I can find some? Thanks!
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Old 09-20-2009, 11:01 AM
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Quote:
Use some WD-40 and a Scotchbrite pad.
Concur. Works great.

Quote:
How do you clean the inside out?? to get the carbon build up out?
There are two ways. First, ride the bike "harder" and burn the carbon out
or second, send the pipe to a pipe repair shop where they will heat it up
to a zillion degrees and burn the carbon out for you.

dogger
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Old 09-21-2009, 01:43 AM
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FWIW, most blueing occurs from chrome polish and/or foreign stuff on the outside of the pipe.
On my old Harleys I used nothing but isopropyl alcohol to clean them and they never blued on me. Really.
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Old 04-06-2010, 11:45 AM
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Has anyone tried Cathodic (sacrificial) protection with these things? Just bolt a big lump of magnesium between one of the mount lugs and the frame and the magnesium should corrode to save the steel (if it works on North Sea pipelines and ships it's got to be worth a shot ).
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Old 04-06-2010, 12:30 PM
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Quote:
Has anyone tried Cathodic (sacrificial) protection with these things?
A novel idea but shouldn't be necessary. Cleaning and protecting an
unfinished pipe should be an integral part of post ride maintenance.
IMO, If someone is too lazy to accomplish this simple task, they should
opt for a chrome or nickel plated pipe.

dogger
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Old 04-06-2010, 01:44 PM
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Quote:
Originally Posted by dogger315 View Post
A novel idea but shouldn't be necessary. Cleaning and protecting an
unfinished pipe should be an integral part of post ride maintenance.
IMO, If someone is too lazy to accomplish this simple task, they should
opt for a chrome or nickel plated pipe.

dogger
'Novel'...pah! It's genius man.

With all due respect, I know very few serious riders who remove their expansion pipe for cleaning after every race. A quick blitz round with the hose and a soapy sponge, then a dousing with WD40 to protect the visible bits... but the bits you can't get to are still exposed to moisture and will quickly corrode. A home made magnesium washer may be just enough to prolong the finish on your works pipe.

(The reason I came on this thread was because I've ordered a Pro Circuit works for my YZSKI 144 and was wondering how durable these pipes are, I'll give my own magnesium washer 'revelation' a try and let you know the results...)
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Old 04-06-2010, 04:59 PM
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Quote:
A home made magnesium washer
Interesting idea. I'm curious about where you plan to mount this piece?
Magnesium is a brittle metal and most pipes are mounted with rubber
isolators out of neccessity. Are you concerned about the survivability
of your cathode? I will be interested to hear how this works.
Quote:
I know very few serious riders who remove their expansion pipe for cleaning after every race.
Nor do I, but I know plenty of serious mechanics for these serious riders that
do. Actually, when I was a serious rider, I removed the engine after every
race and replaced it with a fresh engine. The spent engine got shipped out
for a rebuild. Since the pipe (and everything else) was off the bike, it was
an ideal time to check for dents, cracks and rust (unless it was a mud race,
I seldom found rust). I did find myself opting for the plated pipes as my time
became more valuable and more scarce.

The more casual racer/rider that prefers the look of the unplated pipe can
maintain it by simply giving their bike a thorough post race cleaning, followed
by drying (towel and compressed air), followed by a coat of MTL or WD40
on all exposed metal surfaces. Since the top end should be freshened up a
couple of times a season even for the casual racer, any pipe rust accumulation
can be dealt with then.

Keep us posted on how your Mag doodad works.

dogger
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