Ceramic exhaust coating

MexicoMike · Jul 10, 2025

"Technology has probably advanced some in 40 odd years and is a little better. "

Well, maybe but my experience with using some of the two-part paints like DuPont Imron is that the original formula was much tougher than the current formula(s), probably due to environmental issues.

maaseyracer · Jul 10, 2025

Fast Eddie said:
This was the thermal barrier coating on my head. Note you can’t see the details around the valve seats sharply, or any porosity / pitting in the casting, all because the coating was so thick (ie too thick):

View attachment 120695

You hit the nail on the head with the comment of thickness of coating. All of these need to be applied as thin as possible. The acception to the rule is the abradable coating on piston skirts. Coating used on yours looks like CBC1 ceramic coating from Tech Line.

motorson · Jul 10, 2025

I got cerekote done on my combustion chambers as well. The valve faces as well as the stem on the exhaust valves. The exhaust ports too. I had to lap through the coating on all 4 valves. I also got DLC coating on the rocker shafts and the wrist pins. I recon the whole motor would have melted down at one point when I had it jetted way too lean if I had not had the heat shield coatings in place. I got a measured 70 mpg and could tell she was running way too hot!!
I wont find out how the rocker shafts did until my next tear down. But I think it was a good move.

Fast Eddie · Jul 10, 2025

maaseyracer said:
You hit the nail on the head with the comment of thickness of coating. All of these need to be applied as thin as possible. The acception to the rule is the abradable coating on piston skirts. Coating used on yours looks like CBC1 ceramic coating from Tech Line.

I think that’s exactly what it was.

jseng1 · Jul 10, 2025

I remember when the 4 valve Manx came out many years ago - late 1960s or early 1970s I think. They had high hopes.

See this article
https://magazine.cycleworld.com/article/1970/11/1/four-valves-for-the-manx

maaseyracer · Jul 10, 2025

Fast Eddie said:
I think that’s exactly what it was.

I am using stuff from the same company. The ceramic stuff is a bit brittle and while it can probably handle high temps it is probably not the best thing for an air cooled engine. I have used a similar coating to what I am running, this is the first time running it in an air cooled engine, but I know several fast very fast Triumphs that run this stuff.

gortnipper · Jul 13, 2025

I have HPC coatings on both my barrels and Mike's Maney repop exhausts. Totally happy with them.

Exhaust Heat Management • High Performance Coatings

HiPerCoat™ Fact: HPC’s Exhaust coatings have revolutionised the header industry. Our coatings are unmatched for protection against rust, cracking and burn through. The original ceramic header coating Superior corrosion protection; self-sacrificial quality willRead More...

hpcoatings.co.nz

Fast Eddie · Jul 14, 2025

gortnipper said:
I have HPC coatings on both my barrels and Mike's Maney repop exhausts. Totally happy with them.

Exhaust Heat Management • High Performance Coatings

HiPerCoat™ Fact: HPC’s Exhaust coatings have revolutionised the header industry. Our coatings are unmatched for protection against rust, cracking and burn through. The original ceramic header coating Superior corrosion protection; self-sacrificial quality willRead More...

hpcoatings.co.nz

Different products tho I assume? Folks should remember that they want a heat barrier or insulator on exhausts, and a heat dissipator or conductor on barrels.

Your bike looks all grown up now ! When did you kit it out as an interstate? Dya like it ?

gortnipper · Jul 16, 2025

Fast Eddie said:
Different products tho I assume? Folks should remember that they want a heat barrier or insulator on exhausts, and a heat dissipator or conductor on barrels.

Your bike looks all grown up now ! When did you kit it out as an interstate? Dya like it ?

Yes, different. The barrels are gloss and the exhaust is matte too.

It has been in this guise the past few years, since around when I put the CNW starter on.

I have had the Interstate tank since the mid-90s and ran it that way for quite a few years. The seat was bought then mail order from the UK and was very uncomfortable and.i just had it restuffed before last summer. Very comfy now.

I will likely put the alloy sprint tank back on for next Southern summer.

Fast Eddie · Jul 16, 2025

gortnipper said:
Yes, different. The barrels are gloss and the exhaust is matte too.

It has been in this guise the past few years, since around when I put the CNW starter on.

I have had the Interstate tank since the mid-90s and ran it that way for quite a few years. The seat was bought then mail order from the UK and was very uncomfortable and.i just had it restuffed before last summer. Very comfy now.

I will likely put the alloy sprint tank back on for next Southern summer.

Sounds good. Nice to have different trim and to be able to swap as the mood takes yer !

acotrel · Jul 17, 2025

I was going to have my 2 into 1 exhaust ceramic coated at Castlemaine, but they only do it once per month, a getting there early and waiting while they coated it would have been a pain. I would need to leave home at midnight. I would never use ceramic coating inside a motor.

acotrel · Jul 17, 2025

jseng1 said:
I remember when the 4 valve Manx came out many years ago - late 1960s or early 1970s I think. They had high hopes.

See this article
https://magazine.cycleworld.com/article/1970/11/1/four-valves-for-the-manx

4 valves in a Manx would probably not make much difference. I watched Steve Osko on a two valve Manx race against Ron Tombs on the 4 valve Henderson G50 Matchless, many times. The Matchless was about 2 MPH faster down the straights - it even had a magnesium piston in the motor. A Commando cylinder head is an excellent design - far superior to the Triumph Bonneville head.

Ceramic exhaust coating

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