Nute Posted February 18 Share Posted February 18 I found a replacement BMW K100 tank of the correct year on eBay close to me and it seems pretty good and was a reasonable price. I need to strip the paint off of it so I can check if it got any filler in it and get a better look at the lower shoulders as the things seem to always leak there. BMW used one tank format from 83-86 and then changed in 86 to a slightly different design with a different fuel level sender, a diff size fuel pump and different tank fixing points. The latter type are more freely available and I had also tracked one of those down as I wasn’t sure I could find one of the earlier type. Using it would mean more welding for different fixings and I’ve decided I’d rather use the original earlier design if I can. I’ve picked up the tank but need to strip the paint off of it. I’d rather not sand it off as it’s a pain in the arse. Anyone got any experience on aluminium with using Nitromores ? Link to comment Share on other sites More sharing options...
Buckster Posted Thursday at 15:39 Share Posted Thursday at 15:39 On 18/02/2026 at 16:58, Nute said: I found a replacement BMW K100 tank of the correct year on eBay close to me and it seems pretty good and was a reasonable price. I need to strip the paint off of it so I can check if it got any filler in it and get a better look at the lower shoulders as the things seem to always leak there. BMW used one tank format from 83-86 and then changed in 86 to a slightly different design with a different fuel level sender, a diff size fuel pump and different tank fixing points. The latter type are more freely available and I had also tracked one of those down as I wasn’t sure I could find one of the earlier type. Using it would mean more welding for different fixings and I’ve decided I’d rather use the original earlier design if I can. I’ve picked up the tank but need to strip the paint off of it. I’d rather not sand it off as it’s a pain in the arse. Anyone got any experience on aluminium with using Nitromores ? The new formula Nitromores isn’t as good as the old one, on the plus side it no longer gives you emphysema. I also hear that Aircraft paint remover is very good but expensive and Jenolite. Link to comment Share on other sites More sharing options...
Vamana Gupta Posted Thursday at 16:43 Share Posted Thursday at 16:43 On 18/02/2026 at 12:58, Nute said: I found a replacement BMW K100 tank of the correct year on eBay close to me and it seems pretty good and was a reasonable price. I need to strip the paint off of it so I can check if it got any filler in it and get a better look at the lower shoulders as the things seem to always leak there. BMW used one tank format from 83-86 and then changed in 86 to a slightly different design with a different fuel level sender, a diff size fuel pump and different tank fixing points. The latter type are more freely available and I had also tracked one of those down as I wasn’t sure I could find one of the earlier type. Using it would mean more welding for different fixings and I’ve decided I’d rather use the original earlier design if I can. I’ve picked up the tank but need to strip the paint off of it. I’d rather not sand it off as it’s a pain in the arse. Anyone got any experience on aluminium with using Nitromores ? Have you checked what would a bodyshop charge you...? To have sand blasted with the proper stuff... Link to comment Share on other sites More sharing options...
Buckster Posted Thursday at 17:12 Share Posted Thursday at 17:12 28 minutes ago, Vamana Gupta said: Have you checked what would a bodyshop charge you...? To have sand blasted with the proper stuff... Water blasting is better with aluminium. Link to comment Share on other sites More sharing options...
Vamana Gupta Posted Thursday at 17:40 Share Posted Thursday at 17:40 27 minutes ago, Buckster said: Water blasting is better with aluminium. Not sure exactly what they use around here...walnut or glass..but it has to be done at low pressure... Link to comment Share on other sites More sharing options...
Buckster Posted Thursday at 17:50 Share Posted Thursday at 17:50 8 minutes ago, Vamana Gupta said: Not sure exactly what they use around here...walnut or glass..but it has to be done at low pressure... Glass beads are used with water blasting. Link to comment Share on other sites More sharing options...
Vamana Gupta Posted Thursday at 17:54 Share Posted Thursday at 17:54 Anyway it be something to look at Nute..who knows after you calculate everything...it might be cheaper just to have done... Link to comment Share on other sites More sharing options...
Nute Posted yesterday at 19:48 Author Share Posted yesterday at 19:48 Did it myself. A combination of paint stripper and sanding with a high grit pad. It seems every pre 86 tank has corrosion perforations at the lowest points each side where the water collects and this one is no different. I was contemplating welding it up myself but thin aluminium is difficult and its 75% certain ill just blow through it so getting someone local bike shop to do it. 4 Link to comment Share on other sites More sharing options...
Buckster Posted 12 hours ago Share Posted 12 hours ago 12 hours ago, Nute said: Did it myself. A combination of paint stripper and sanding with a high grit pad. It seems every pre 86 tank has corrosion perforations at the lowest points each side where the water collects and this one is no different. I was contemplating welding it up myself but thin aluminium is difficult and its 75% certain ill just blow through it so getting someone local bike shop to do it. My new Tig welder is great for aluminium. 1 Link to comment Share on other sites More sharing options...
Nute Posted 1 hour ago Author Share Posted 1 hour ago Im sure mine is great for it too... in the hands of someone who is skilled, which I'm not ... I'm ok on 1.5mm and up, mostly, but the tank is really thin, at least where the holes are it is. Link to comment Share on other sites More sharing options...
boboneleg Posted 1 hour ago Share Posted 1 hour ago 11 hours ago, Buckster said: My new Tig welder is great for aluminium. Offer to weld it for him then ........ Link to comment Share on other sites More sharing options...
Buckster Posted 1 hour ago Share Posted 1 hour ago 1 minute ago, boboneleg said: Offer to weld it for him then ........ More than happy to although he would have to drop it into me at the castle. Link to comment Share on other sites More sharing options...
Buckster Posted 1 hour ago Share Posted 1 hour ago 35 minutes ago, Nute said: Im sure mine is great for it too... in the hands of someone who is skilled, which I'm not ... I'm ok on 1.5mm and up, mostly, but the tank is really thin, at least where the holes are it is. Of course it's thin where the holes are, that's the nature of holes. Link to comment Share on other sites More sharing options...
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