pawelcen Posted December 14, 2020 Author Share Posted December 14, 2020 Hi, I would like to change the original concept of restoring my two bikes. Let me remind you: - the first is from the C5108 order and has the original: frame, front fork, engine, normal (fast) gearbox, oil and fuel tank without panel, rear mudguard with light holder and wheels. - the second has a frame from a later order C6128, a wide ratio gearbox and an original oil tank. The crankcase consists of two different halves. The left one has the engine number from earlier order C5108. Plus I have an original front mudguard, fuel tank with control panel. Second front and rear mudguards and front fork are copies from India. Since the first one is mostly original, I think to make it to the specification as it was produced in 1940, i.e. military green. The original parts would be assembled on this bike. The second would be made as a civilian version in black with chrome elements and a fuel tank with panel controls. The front fork, mudguards from India, would go to him. And the original fuel tank with control panel. I gave up on the idea of making an RAF version. Help me decide, is this a good idea?🤔 Best regards . Pawel Quote Link to comment Share on other sites More sharing options...
Ron Posted December 14, 2020 Share Posted December 14, 2020 That's sounds like a plan to me. Use all the best and original parts to build a factory spec 3SW. Then have freedom fun with the rest. Ron Quote Link to comment Share on other sites More sharing options...
welbike Posted December 14, 2020 Share Posted December 14, 2020 Yes, think it's a very good idea, better one very original bike, than 2 "bitza's" Lex Quote Link to comment Share on other sites More sharing options...
pawelcen Posted December 14, 2020 Author Share Posted December 14, 2020 Ron, Lex, thanks for your feedback. I will have to change both topics, or joint them into one. I looking for a part of the engine plate front shield F1684. Do you know who makes these parts? Maybe I'll do it myself, it's not very complicated. Do you know how thick this part is made of? Regards Pawel Quote Link to comment Share on other sites More sharing options...
pawelcen Posted December 25, 2020 Author Share Posted December 25, 2020 Merry Christmas. Pawel Quote Link to comment Share on other sites More sharing options...
Ron Posted December 25, 2020 Share Posted December 25, 2020 Seasons greetings Pawel and to all other forum members. Ron Quote Link to comment Share on other sites More sharing options...
pawelcen Posted December 26, 2020 Author Share Posted December 26, 2020 Thanks for all. It's the second day of Christmas in Poland and I'm thinking of the Triumph engine which I want to assemble on Monday. I have doubts: is there a gasket between the crankcase halves? I didn't find it in the parts list. Pawel Quote Link to comment Share on other sites More sharing options...
Ron Posted December 26, 2020 Share Posted December 26, 2020 No Gasket Pawel. They used "Shellac" in the old days. I use "Welseal" Ron Quote Link to comment Share on other sites More sharing options...
pawelcen Posted December 26, 2020 Author Share Posted December 26, 2020 Thanks Ron. I use Hylomar or Reinzosil. Pawel Quote Link to comment Share on other sites More sharing options...
pawelcen Posted December 29, 2020 Author Share Posted December 29, 2020 Hi. Today, the bottom of the engine was assembled. As per Brian's recommendations, I determined the thickness of the washers: Quote I only use a shim between flywheel and bearing if it needs it. A bit of trial and error to stop any side to side movement and Center the conrod in the cylinder. After completion, assembly today was easy. I heated and froze the parts one by one so that they could be assembled without a hammer and press. Everything worked out and the engine is ready for further work. Regards Pawel 1 Quote Link to comment Share on other sites More sharing options...
Ron Posted December 29, 2020 Share Posted December 29, 2020 I guess that Mrs Pawel was out? Or if like me, you have a little oven in the workshop😆 Ron Quote Link to comment Share on other sites More sharing options...
pawelcen Posted December 29, 2020 Author Share Posted December 29, 2020 My wife Margaret stayed at home. I went to the summer house for my parents. It will air out by spring. 🤣 Pawel 1 Quote Link to comment Share on other sites More sharing options...
Ron Posted December 29, 2020 Share Posted December 29, 2020 When I used our oven for crank cases when Janet was out, I blamed the neighbours for having a smelly BBQ😇 Ron 1 Quote Link to comment Share on other sites More sharing options...
pawelcen Posted December 29, 2020 Author Share Posted December 29, 2020 The smell was worse when burning paint on carburetors. 😃 The crankcase and crankshaft were washed in gasoline, hardly smelled. Pawel Quote Link to comment Share on other sites More sharing options...
79x100 Posted December 29, 2020 Share Posted December 29, 2020 Ron, the smell and smoke is much reduced if you put the cases in the dishwasher first ! Quote Link to comment Share on other sites More sharing options...
Ron Posted December 29, 2020 Share Posted December 29, 2020 The dishwasher was out at the time!!! Ron Quote Link to comment Share on other sites More sharing options...
pawelcen Posted December 29, 2020 Author Share Posted December 29, 2020 I understand you're talking about pure aluminum, no screws, no bearings etc. Once upon a time I had to make lubrication channels in a ball bearing. After grinding, I washed it very briefly with water, but the bearing was only fit to be thrown away. Oiling did not help. Today no water, just to drink.😃 Pawel Quote Link to comment Share on other sites More sharing options...
79x100 Posted December 29, 2020 Share Posted December 29, 2020 Yes, bare crankcases. In the old days, it involved a galvanised bucket balanced on a camping stove with a cupful of washing powder ! You can't beat a boil wash 😀 By the way, Ron, I'm telling on you ! Quote Link to comment Share on other sites More sharing options...
Ron Posted December 30, 2020 Share Posted December 30, 2020 "By the way, Ron, I'm telling on you !" She won't hear a word against me😏 Ron Quote Link to comment Share on other sites More sharing options...
pawelcen Posted January 4, 2021 Author Share Posted January 4, 2021 More problems in the New Year. 1. Is my cylinder head correct? Found in Cornucopia with a different combustion chamber. 😮 2. Is exhaust valve lifter correct? Pl's help me. Pawel Quote Link to comment Share on other sites More sharing options...
Ron Posted January 4, 2021 Share Posted January 4, 2021 I can't find a picture of a 3SW cylinder head that's upside down. If your head is the right shape and fits ok, I wouldn't worry about the relieve you have in the "squish" area. At worst it can only reduce the compression by a fraction. How do we know that the Cornucopia head is correct. I'm no expert, but it seems to me that you need a bit of gap for the flame to travel through. I expect Brian will know. It's just a hardened washer for the valve lifter. Ron Quote Link to comment Share on other sites More sharing options...
pawelcen Posted January 5, 2021 Author Share Posted January 5, 2021 Thank you Ron. I asking Brian. Pawel Quote Link to comment Share on other sites More sharing options...
79x100 Posted January 5, 2021 Share Posted January 5, 2021 The red-painted head is so difficult to look at, with that flicking image....Has it perhaps been skimmed ? As Ron says, it's normal to have some combustion chamber above the piston. Quote Link to comment Share on other sites More sharing options...
pawelcen Posted January 5, 2021 Author Share Posted January 5, 2021 This red head (Ferrari 😂) cannot be seen better. There are different solutions for combustion chambers, so I don't know which one is original. For example american school. German construction. I will have to remove the head from another copy and compare them. Pawel Quote Link to comment Share on other sites More sharing options...
welbike Posted January 5, 2021 Share Posted January 5, 2021 I had a pair of NOS R12 heads, the were for the low octane petrol, and marked as such, lower compression. Lex Quote Link to comment Share on other sites More sharing options...
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