Recent Posts  By   (Read times)

I know there are a few threads on this subject. The question whether you should set the valve lash hot engine running or cold engine off. Well I tried both and i think the cold method is more accurate and gives more performance. This is why.
The smaller the valve lash the bigger the valve lift and the more air/fuel charge gets sucked in. Obviously there is a danger if the lash is too small for you will burn the valves. With the hot setting you never know when enough is enough. Between the hot and cold setting the lash was rather bigger (hot) which means that the valve does not open to its maximum and less charge gets sucked in. With the cold setting you can't really go wrong in terms of the lash. Unless there were other variables at play such as weather (more atmospheric pressure today) I believe my YY250T Jonway pulls better with the cold method.

Also the piping to the rear is a little further and that could also be a reason and with no servo assistance.

Cirnobyl Alleyoop is right you can never take the idle jet out as it will never idle. The idle jet must be in tight ,however you can alter the value (a little number like #38 or #40 will be stamped on it) The reason why it is bogging down is because the original air intake point (the two little holes) is gone and the engine is now getting a lot of air but still the same amount of fuel. You will have to alter the idle jet, the jet needle (here I suggest buy another one with grooves but of the same value as it too has a value) and the main jet. I have a #38 idle, 118 main, same needle just on the 2nd groove from top. A word of warning though. Once you alter the air etc you have set yourself on a road of great frustration unless you lucky and get it right first time. It is however fun and you can teach yourself a lot. Do one thing at a time as that way you can control and undo what you did last.

She is purring like a kitten at a steady 1200 rpm. Teachers think alike so I'm with ccprof on this one ...practise, practise practise, makes perfect. Good one Denise and don't worry about the size you look marvelous babe.

PS footnote, yellow and orange don't go so better get yourself a bikers jacket to complete the look lol.

Fubar i guess that is about correct if the scoot is still standard ie. old air cleaner standard jets etc. The shaft must have end play.

Alleyoop you right. The problem is however how much ticky ticky must you hear? When is enough... enough? If you can get it spot-on the extra performance is there to find. The smaller the gap the higher the lift of the valve but with the danger of burning the valve and the bigger the gap the safer it is for the valve but you loose on lift, less charge goes in and some damage eventually to the cam.