montesa 348 kick trouble Posted July 13, 2019 Report Share Posted July 13, 2019 anyone out there have an idea what im missing....Why the bike wont start....heres where its at.... the bike: 1974 montesa 25a sintrifical clutch ,decompresion ,clutch depresser all good .....have spark(new plug),has fuel...carb very clean,with new float needle valve and fuel screen and gaskets..float sits as it should/parralel to body when held upside down,and is in excelent condition......bike has good compresion....timming and spark plug gap are set to factory specs.timming at 2-2.25mmBTDC and plug gap between 0.016-0.018 one thing though....the plug gets wet with fuel and does not egnite /fire the engine...i remove plug clean and dry,dry out combustion area ,try again and same thing happens..........i try starting with no choke or choke,same thing......i was thinking mabe the float valve seat could be pitted and alowing fuel past.........i still have to examine that....any ideas would be greatly apreciated....id like to get this bike going while my boys are still small enough to use it. Quote Link to comment Share on other sites More sharing options...
scifi Posted July 13, 2019 Report Share Posted July 13, 2019 Quote The plug gap seems a bit close, why not the usual 25 thou. Also if it's an old plug, it might spark out of the cylinder, but not when under compression. Is it auto-decompressor..? . Quote Link to comment Share on other sites More sharing options...
lineaway Posted July 14, 2019 Report Share Posted July 14, 2019 The main seals could be gone. leave the fuel off and just try fuel through the plug to see if will go. Then a leak down test. Quote Link to comment Share on other sites More sharing options...
montesa 348 kick trouble Posted July 14, 2019 Author Report Share Posted July 14, 2019 ok ill do a leak down test.......there probly dryed out/not doin there job Quote Link to comment Share on other sites More sharing options...
collyolly Posted July 14, 2019 Report Share Posted July 14, 2019 Squirt some 'easy start' or 'Cold start' into the back of the carb. Also try with a pre heated plug. Quote Link to comment Share on other sites More sharing options...
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