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Norvin Single race bike first run
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<blockquote data-quote="greg brillus" data-source="post: 126784" data-attributes="member: 597"><p>It runs on methanol, which is very common on classic race bikes here in Australia and NZ........The piston is a 12:1 comp ratio but we machined some material off the base of the muff to reduce the squish band down to 0.035" so I feel the piston is about 12.5:1 now........ I will get some pistons made to up the comp to around 14:1 to make better use of the fuel.......The piston in it is a CP and nothing really special, so there is more to be done there. The bike was away getting the exhaust done by a crowd who specialize in performance exhausts, this uses lengths of pipe that get larger in ID from section to section, and the muffler uses a perforated tube that acts as a mega with absorption material around it. The bike is far noisier than it was with the old engine, and this did not surprise me at all........ I feel it will be over the DB limit at some tracks so I will need to do something there. We had also been machining up a nice primary cover for it, and this is mostly finished.........Just the odd bit to finish off here and there now........It still tips the scales under 130 Kg's, this with oils but no fuel........ i was happy to get that figure as it weighed in at 130 with the old engine, and I know the Comet engine was a few kg's heavier than the ESO.........As usual I've gone overboard with it, but that's just what I like to do.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 126784, member: 597"] It runs on methanol, which is very common on classic race bikes here in Australia and NZ........The piston is a 12:1 comp ratio but we machined some material off the base of the muff to reduce the squish band down to 0.035" so I feel the piston is about 12.5:1 now........ I will get some pistons made to up the comp to around 14:1 to make better use of the fuel.......The piston in it is a CP and nothing really special, so there is more to be done there. The bike was away getting the exhaust done by a crowd who specialize in performance exhausts, this uses lengths of pipe that get larger in ID from section to section, and the muffler uses a perforated tube that acts as a mega with absorption material around it. The bike is far noisier than it was with the old engine, and this did not surprise me at all........ I feel it will be over the DB limit at some tracks so I will need to do something there. We had also been machining up a nice primary cover for it, and this is mostly finished.........Just the odd bit to finish off here and there now........It still tips the scales under 130 Kg's, this with oils but no fuel........ i was happy to get that figure as it weighed in at 130 with the old engine, and I know the Comet engine was a few kg's heavier than the ESO.........As usual I've gone overboard with it, but that's just what I like to do. [/QUOTE]
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Norvin Single race bike first run
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