beton Posted November 20, 2010 Report Share Posted November 20, 2010 Hello all, I am Ton from the Netherlands and recently bought a Fantic 241 Trial is quite a sorry state... The piston has a piece missing from the top edge and the piston ring has a piece missing. The barrel itself seems to be oke. My plan is to make the bike technically sound first before restoring it completely. I have been looking for a piston for some time now and I can find 3 piston brands that can supply a 69mm piston; - Asso Werke (original piston) - Vertex - Pattern The Asso piston is becoming rare and fairly expensive! Are the other 2 brands any good, or should I stick with the original piston? The bike: The piston: Quote Link to comment Share on other sites More sharing options...
beton Posted November 20, 2010 Author Report Share Posted November 20, 2010 One other question I have is the following: The downtube of the frame seems to have a big dent in it. Is this "original" (to accomodate the carb...) or is my frame damaged? Quote Link to comment Share on other sites More sharing options...
lee harris Posted November 20, 2010 Report Share Posted November 20, 2010 The Dent is std, no worries Asso is tghe best but most expensive, Gul is the cheapest and you will feel it I have no experience with the Vertex... Lee Quote Link to comment Share on other sites More sharing options...
beton Posted December 17, 2010 Author Report Share Posted December 17, 2010 Many thanks to Lee Harris and his Dutch friend! My package with the barrel and piston arrived this week in good condition. Now all I have to wait for is for my gasket set to arrive from the UK. I want to assemble the engine and try to get it going before spending too much money on this bike. As I don't have a workshop manual for this bike and cannot find it anywhere, are there specific issues I need to take care of assembling the engine, like: Is there a certain order for torqueing down the head nuts? What is the torque anyway? Is there a specific method or tool to install the piston on the conrod? Do I need to use liquid gasket somewhere? What kind of oil should I use and how much? What is the right spark plug? Any other bits I should replace while I am at it? Sorry for all the questions... hope someone can help me before I mess something up. Any other tips and tricks are more than welcome! Quote Link to comment Share on other sites More sharing options...
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