Hey BigBore,
Yes it seems the engine gets caught in a lean burn on decel and bucks or surges. Usually at the least opportune moment, like wanting to slow down to make a turn. You get a "mmpow mmpow pow" and get pushed farther than you need to go!
I don't recall anyone claiming to have any engine damage due to the condition.
The remedies vary from a new or different carb, to fatter jetting to a kips bolt mod.
I'm sorry I can't give you a better answer. The bike seems to have a lean burn condition when the jetting is close to optimum.
The engine draws in just enough of an air/fuel mix through the pilot circuit when the throttle is chopped and the engine is decelerating to burn lean instead of Idle down.
Sorry I can't be of any more help than that.
Tuck\o/
hi all,
just an update on this, i stripped the carb and here is the spec of it:
the small stumpy jet is 175 (main jet?)
the skinny long jet is 45 (pilot jet?)
Needle has: NR1371 stamped on it and is on the 3rd clip down (or up) basically its in the middle
Havent been able to check the air screw yet.
According to my clymer manual standard spec is:
the 175 jet is correct,
but the 45 jet should be a 62
the needle code doesnt match
but the needle is on the correct cilp /notch
So from what i gather im running lean at the moment?
Is this right?
Oh and the other thing i noticed is that when i start the bike from cold, there is hardly any smoke out the back on it at all? And when you take off in first after just starting it and bring in the power, it doesnt have to clear itself like all other 2 strokes i have. What i mean by clear itself is that is doesnt splutter and blow a lot and smoke and then it comes alive.
i currently mix the fuel at 5 litres of petrol to 125ml of premix oil.
Many thanks for all the replies, much appreciated guys