Curare, I finally got round to buying 2 new main jets #120 and a #115. Unable to get a #118. and no luck with a pilot jet. They are both genuine Honda parts but still have no numbers. I started with a new sparkplug Champion L95YC. I put in the #120 and took it for a spin . Felt good.Coming down a hill at 85-90 KMPh, I cut the ignition and pulled the clutch. came to stop and checked the plug. It was as white as Columbia’s finest, far too lean. Got home and put the original main jet back in. Visually, it looks the same as the #115 but I can’t be too sure . Did another plug chop and the colour was alittle darker, but I figure its still too lean.
My oil mix is 2%, also the "chrome " slide is becoming a bronze/ copper colour. I think because of the wear on the slide my engine has become leaner. Is this possible??
The engine is running very well at the moment, but this always worries me due to the colour of the plug.
Any ideas, advice,comments???