Topic: RE: NOS Kerker / Winning Ceramic or High Temp inside

[chewbacca5000]

I am going to drop my new never run Winning exhaust today and coat the inside with BBQ or high temp exhaust paint today and am looking for recomendations.  I am doing this to keep my exhaust looking new and prevent that golden rainbow effect that seems to happen during the jetting phase, or from oil on hands or elsewhere.

Thanks.

[chewbacca5000]

Even with high temp or ceramic costing inside, you'll never prevent the discoloration from occurring. You can only minimize it and tend to it with polishes as it occurs. High temp treatments reduce the radiation of heat outward, but simply can not prevent it from happening.

Thaks Cal,

Wiped exhaust down with acetone and clean rag after the high temp.  Gonna cure in my oven.  Figure a few heat cycles before the install will give me the greatest change of success. Any tips for avoiding the rainbow would be appreciated.  Should be good to go as soon as my throttle cables come in.

One interesting thing I noticed was that the carb gauge I have been using sits 2mm above the gasket surface.  I normally set my carbs to 25mm K1 spec, but I guess I have been setting them to 27mm if you figure in the extra 2mm that the gauge is above the gasket.

Would running at 27mm or 28mm discolor exhaust immediately?  I always seem to get a nice golden hew especially to #4.  This bike is coming along nicely and don't want to discolor exhaust.

[Trad]

The discoloured exhaust shows it's be ridden  , I more than like the finish they get. Blueing on chrome pipes and the gold hue on stainless pipes. MMMMMMMMMMM....hahah.

To each their own though. I think your process so far will minimize it's effect. Here's a thought though; Why not ceramic coat the outside in a chrome-look, silver or black? then you don't have to worry about the colour change at all.

[chewbacca5000]

The discoloured exhaust shows it's be ridden  , I more than like the finish they get. Blueing on chrome pipes and the gold hue on stainless pipes. MMMMMMMMMMM....hahah.

To each their own though. I think your process so far will minimize it's effect. Here's a thought though; Why not ceramic coat the outside in a chrome-look, silver or black? then you don't have to worry about the colour change at all.

I would, but it is a NOS and want to keep the chrome.

So blue is too lean, but what about the gold color?  Can too rich dis-color an exhaust?

[Don R]

 I used the eastwoods inside paint, it comes with a spay hose to paint the inside. Midwest Choppers used to run the engine on a new bike on choke for a while to coat the inside of the pipe with carbon. Who knows if it worked of for how long.

[chewbacca5000]

I used the eastwoods inside paint, it comes with a spay hose to paint the inside. Midwest Choppers used to run the engine on a new bike on choke for a while to coat the inside of the pipe with carbon. Who knows if it worked of for how long.

Carbon coating that rich!  Sorry forgive the pun could not help myself.  Learn something new everday.  It is cooking at 500F right now.

[chewbacca5000]

We'll I cooked it a 550 degrees for close to an hour.  Thinking about giving it another round of heat cool.  Can't really go any hotter without damaging the insulation on my oven.  Not sure the extra will make too much difference.

Looked down in the muffler and it looks great!  Am hoping this will let me get the bike tuned up.  It is really a trailer queen anyhow.  It looks so great you don't want to ride it.

Sad really.

[Powderman]

What did you end up using? If you didn't blast the inside of the pipe don't expect it to stay in there very long.

[PeWe]

Make sure that the carbs ar not too lean jetted.
My chromed 4-1 got a bluish tone due to a severe overheat. The golden tone however, look good.

[chewbacca5000]

What did you end up using? If you didn't blast the inside of the pipe don't expect it to stay in there very long.

No I did not blast the inside.  To be honest didn't even think to.  Will do next time.  Really need to get pas the intial dial in phase.  I used a 1200 flat black that I have had luck with.  You can get it at harbor freight.  Think it is made by rustoleum.

[chewbacca5000]

Make sure that the carbs ar not too lean jetted.
My chromed 4-1 got a bluish tone due to a severe overheat. The golden tone however, look good.

Thanks Pewee.  Any recomendations?  Got the clip in the middle, 115 main, 1 1/2 turns out.  K & N air filter.

Getting lots of poping, but need to check for air leaks.  Any tips on checking for air leaks on the exhaust?

[chewbacca5000]

I should add that the "baffle" if you can call it that might not have the most back pressure.

[chewbacca5000]

What did you end up using? If you didn't blast the inside of the pipe don't expect it to stay in there very long.

Here is the link

http://www.harborfreight.com/iron-armor.html

Got to buy in store.  I used it on a cb500 before and it came out great.