Hi!
i have a 70cc engine that is giving me some headache, it has never ran properly cant get it to rev out to top rpm and has been low on torque.
it has aslo guzzled gas, about 0-3-0.35 L / 10 km witch is a lot for a small engine. my other engines that run good does 0.2-0.25 L / 10 km.
So i started experiment with different carbs with out any change, so i took the cylinder of one of my other engine and put that on. now it runs a lot better, not perfect but better it will rev up ok and has a lot more torque.
So i'm guessing that the ports in the cylinder might be misaligned or something perhaps a bad casting( casting cores not properly fitted when they cast the cylinder)
does any anyone know how the ports should be located inside the cylinder to allow these engines to run properly, can someone measure out a cylinder that is good so i can make sure i get a hold of a cylinder that is ok.
would be nice if it where measured in metric system but imperial works as well i can use a calculator to translate... i hope
//Heathen
i have a 70cc engine that is giving me some headache, it has never ran properly cant get it to rev out to top rpm and has been low on torque.
it has aslo guzzled gas, about 0-3-0.35 L / 10 km witch is a lot for a small engine. my other engines that run good does 0.2-0.25 L / 10 km.
So i started experiment with different carbs with out any change, so i took the cylinder of one of my other engine and put that on. now it runs a lot better, not perfect but better it will rev up ok and has a lot more torque.
So i'm guessing that the ports in the cylinder might be misaligned or something perhaps a bad casting( casting cores not properly fitted when they cast the cylinder)
does any anyone know how the ports should be located inside the cylinder to allow these engines to run properly, can someone measure out a cylinder that is good so i can make sure i get a hold of a cylinder that is ok.
would be nice if it where measured in metric system but imperial works as well i can use a calculator to translate... i hope
//Heathen