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Sorry, I'm a bit late seeing this but I'm presently on vacation and don't have access to my invoice. I do recall they replaced the air box assembly between the air filter and carb. If you still need further info, I'll be back home in a few weeks.

If you have time to upload or post any info for this matter. I'm still interested. Thanks.

Hello everyone. Has anybody experience a failing or bad cdi? What are the symptoms? My b&w250 idles fine. But on sudden acceleration it lacks the kick of a 250cc its like accelerating on high gear, full throttle is like the same as half throttle no passing of power, ignition timing is off the mark using timing light. Any thoughts or comments.

Thanks for the info.

I just want to add. After replacing the ignition coil, my scooter now has top end power. Before it feels like as if its fuel starve, rough idle, engine will misfire at idle and most of all no full throttle power.


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Ok, its a guessing game. Thats bad news.
Yeah i forgot to mention that i have already installed 40 pilot.

Zombie thanks for your fast reply.

Problem solved! At last throttle lag is now a thing of the past, after relentlessly cleaning the carburetor in my desperation i accidentally turn the carb upside down and saw the needle slide inside the vacuum piston (the needle is supposed to be fixed in there). Put a clip on the needle and some shim to let it sit a bit higher on the main jet.

Also off idle hesitation is gone after re jetting the stock pilot #38 to #45 and main jet #102 to #105

I notice the engine runs smoother with impressive acceleration.

Thanks for all your inputs!

Engine oil drain plug 17mm. Best to use a socket and also remove the plastic engine cover to avoid cross threading the plug.

But if you mean gear oil plug its 12mm.

Okay ill go straight to the problem. When i twist the throttle it seems that theres a 1 second delay before the engine picks up, cleaned the carb and adjusted the valve clearance the ignition timing is on stock specs and no engine mods. No electrical issue the scooter idles fine. Any help or idea is highly appreciated.

Thanks Mr. Li for the manual.