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Post by rd350rob on Jan 22, 2018 17:10:21 GMT 1
Old subject, I know, and there's a few oldthreads, but none of them seems to give a definitive answer...... Got my 31K cases sitting in the garage; they've been vapour blasted back to ally, and now I want to paint the top one black. I've got a couple of cans of PJ1, but this is the new type (bought them last year). I read somewhere that, this stuff is NOT fuel resistant- is this the case (see what I did there)? If it's not fuel resistant, I won't bother- can anyone suggest a better paint? Not sure if it needs to be VHT, apparently the cases won't get hot enough....
Any advice appreciated! |
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Post by dllc on Jan 22, 2018 17:35:18 GMT 1
the new pj1 isnt a patch on the old stuff, last time i used simonze from holts, does the trick, i did the clutch / flywheel covers not the crank cases
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Post by dusty350 on Jan 22, 2018 17:53:07 GMT 1
Hi I bought this from Halfords for my Lc cylinder head;  20180122_163933 by David Miller, on Flickr I got both the head and can of paint warm first then sprayed it on. Goes on nice and easily and gives a really nice finish. I didn't bake it or anything like that. When I removed the head later to sort a slight head gasket weep I thought I would see how good the paint was regards petrol resistance. I put the head in a tupperware box and poured in about half a litre of clean petrol. I worked at the head with a paint brush and the petrol wouldn't touch it !! I was amazed as I thought the paint would come straight off. I left it immersed in the petrol for about 10 minutes and still no damage to the paint. I took the head out, dried it off and as it hadn't lost any of it's shine I just bolted it straight back on the engine. I'm a fussy git and if there had been any damaging effect from the petrol I would have resprayed the head but there was no need. This probably sounds like one of those crappy adverts on tv, but it really is good paint  Dusty  |
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Post by bezzer on Jan 22, 2018 20:02:10 GMT 1
Hi I bought this from Halfords for my Lc cylinder head; 20180122_163933 by David Miller, on Flickr I got both the head and can of paint warm first then sprayed it on. Goes on nice and easily and gives a really nice finish. I didn't bake it or anything like that. When I removed the head later to sort a slight head gasket weep I thought I would see how good the paint was regards petrol resistance. I put the head in a tupperware box and poured in about half a litre of clean petrol. I worked at the head with a paint brush and the petrol wouldn't touch it !! I was amazed as I thought the paint would come straight off. I left it immersed in the petrol for about 10 minutes and still no damage to the paint. I took the head out, dried it off and as it hadn't lost any of it's shine I just bolted it straight back on the engine. I'm a fussy git and if there had been any damaging effect from the petrol I would have resprayed the head but there was no need. This probably sounds like one of those crappy adverts on tv, but it really is good paint Dusty Sounds the biz Dusty… out of interest did you need to prime the head first?, and if so which primer did you use. Cheers bud. bezzer |
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Post by dusty350 on Jan 22, 2018 20:51:17 GMT 1
Hi Iain No, I didn't bother with a primer. To be honest I thought the first splash of petrol would take the paint off which would then have made me go with plan B which was to polish the head the same as the rib running around it, but it's so durable that I just bolted it back on once I had sorted the head gasket. I haven't done any miles on the bike yet so I've yet to see what it's like at running temps, but as it's sold as engine enamel I'm hoping it will last well when in use. Dusty |
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Post by liffy16 on Jan 22, 2018 20:57:41 GMT 1
2k lacquer ?
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Post by rd350rob on Jan 23, 2018 8:50:31 GMT 1
Hi Iain No, I didn't bother with a primer. To be honest I thought the first splash of petrol would take the paint off which would then have made me go with plan B which was to polish the head the same as the rib running around it, but it's so durable that I just bolted it back on once I had sorted the head gasket. I haven't done any miles on the bike yet so I've yet to see what it's like at running temps, but as it's sold as engine enamel I'm hoping it will last well when in use. Dusty Cheers mate. Have you got a photo of the head handy? I'd be interested in seeing what the finish is like, i.e. will it look good on the top case of a 31K.
Sounds pretty fuel resistant to me though; might just go with it anyway.....
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Post by dusty350 on Jan 23, 2018 9:09:00 GMT 1
Hi Can't answer whether it would look good on your top case - I personally don't like painted crank cases but that's just me. If it's what you like then go for it. My thinking is the top case paint could easily get chipped/rubbed/worn in use and soon look tatty. Also the fact you have had them vapour blasted probably doesn't give you the best "key" for paint - you would need to rough them up a bit for a better finish. I personally prefer vapour finished cases as they are relatively easy to keep looking like new - the process seals the pores of the aluminium and gives a really smooth finish that's easy to keep clean, but probably doesn't help a coat of paint to adhere to. Anyway, whichever way you go, good luck and I'm sure you'll do a good job of it. And this is the paint finish on the 350lc head;  20170304_094805_zpsudzmp7mg by David Miller, on Flickr  20170304_094812_zpsbgusrorb by David Miller, on Flickr Hth Dusty |
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Post by rd350rob on Jan 23, 2018 9:22:53 GMT 1
Hi Can't answer whether it would look good on your top case - I personally don't like painted crank cases but that's just me. If it's what you like then go for it. My thinking is the top case paint could easily get chipped/rubbed/worn in use and soon look tatty. Also the fact you have had them vapour blasted probably doesn't give you the best "key" for paint - you would need to rough them up a bit for a better finish. I personally prefer vapour finished cases as they are relatively easy to keep looking like new - the process seals the pores of the aluminium and gives a really smooth finish that's easy to keep clean, but probably doesn't help a coat of paint to adhere to. Anyway, whichever way you go, good luck and I'm sure you'll do a good job of it. And this is the paint finish on the 350lc head; 20170304_094805_zpsudzmp7mg by David Miller, on Flickr 20170304_094812_zpsbgusrorb by David Miller, on Flickr Hth Dusty Hmmm....tasty. If I don't use it for the case, at least I know what to use for the head now!! Looks lovely.
Cheers for the advice, mate.
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Post by dusty350 on Jan 23, 2018 9:35:23 GMT 1
You are welcome Rob. Go with what YOU want, but just bare in mind that you may need to prep your cases if you do paint them. Dusty |
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Post by bezzer on Jan 23, 2018 9:47:34 GMT 1
Hi Iain No, I didn't bother with a primer. To be honest I thought the first splash of petrol would take the paint off which would then have made me go with plan B which was to polish the head the same as the rib running around it, but it's so durable that I just bolted it back on once I had sorted the head gasket. I haven't done any miles on the bike yet so I've yet to see what it's like at running temps, but as it's sold as engine enamel I'm hoping it will last well when in use. Dusty Cheers Dusty, As ever with your meticulous builds, the finish is a credit to your preparation mate. Will use this on my head and barrels, no priming is a bonus! 😁 Thanks for sharing the info/pics buddy! |
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Post by tony1964 on Jan 23, 2018 16:54:09 GMT 1
Hi Dusty,
Was wondering if you treated your cases with ACF50 to protect them?
Tony
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Post by dusty350 on Jan 23, 2018 17:29:07 GMT 1
Hi Yea I have done in the past. Don't ride much nowadays thanks to my knackered back/shoulder and now knee !! So I don't bother now as I just don't do the miles, but it is a good idea if you are going to use the bike regularly. Dusty |
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Post by jakethepeg007 on Jan 23, 2018 18:03:10 GMT 1
I've used the Hycote paint when I rebuilt my africa twin, I've done about 1500 hardish road miles on it, even the paint on the exhaust headers is still looking as good as when it was painted. I had a sticking float on 1 carb which poured petrol everywhere but the paint stood up. The paint sprays well from the can which is always a bonus!
I had soda blasted the whole engine, a light etch primer coat and then colour
cheers
John
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Post by dyrberg123 on Jan 23, 2018 22:10:45 GMT 1
I've used the Hycote paint when I rebuilt my africa twin, I've done about 1500 hardish road miles on it, even the paint on the exhaust headers is still looking as good as when it was painted. I had a sticking float on 1 carb which poured petrol everywhere but the paint stood up. The paint sprays well from the can which is always a bonus! I had soda blasted the whole engine, a light etch primer coat and then colour cheers John Sounds like the way i would do it too.. That engine is eyecandy. |
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Post by headcoats on Jan 24, 2018 10:22:06 GMT 1
This looks good stuff especially after the demise of the legendary PJ1
Do they do satin black ?
Will probably try it out on my YPVS barrels and head
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Post by dusty350 on Jan 24, 2018 11:31:48 GMT 1
Hi Not sure if they do satin. I was after gloss and it's the first can I picked up so didn't look at any others. Dusty |
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