50cc scooter wrecked, now no power By terracide (Read 800 times)

[terracide]

I am still a noob at riding and I wrecked the first time I rode my brand new tpgs 824 at night, silly enough I hit a curb at almost top speed (30 to 35mph at that moment) head on and bent both rims and the bike fell on top of me (a few bruises, but lesson learned). Since the accident, the scooters engine will stay running, but when you accelerate it loses all power as it tries to rev up. If I remove the airbox and run air straight to the carb it accelerates just about to its top speed and seems to run fine (a little rough w/o the airbox of course). My friend helped me troubleshoot, removed carb, used carb cleaner with it running, etc.. checked all of the lines, blew them out with compressed air (saw nothing come out of them) no leaking oil, nothing, just no power with the airbox attatched. Is this a vacum leak?
thanks

[terrilee]

one or another

either air / vacum
or gas
try adjusting the air/fuel screw
a small crack/hole in either of the lines will effect it

try that hun

[bcgreatness]

well during a wreck, your scooter goes through a bunch of shock, theres no telling what parts of the motor were effected by the shock of the impact. you will have to go through everything on the motor to see. i would check all of the lines, and the intake boot, and the exhaust where the header pipe bolts to the motor. also i would rebuild the carb to make sure its sound and nothing in it broke during impact shock. hope you get it sorted out and were are glad your still alive, top speed crashes arent any fun

[Bashan]

Sounds like a heck of an impact, glad you're OK. Did you check inside the airbox and hose to make sure something isn't obstructing the air flow? Sometimes it's the simplest things. Rich

[terracide]

that didn't work, I had tried that before, but just tried again to no avail . (nothing blocking the lines or airbox that I can find). thanks for the help tho.. we took the carb off and found no issues with it previously. cant find sign of a leak, but haven't given that a total check either. I just went out again and same issue. with the airbox attached, as soon as it starts to really rev up, it loses all power but stays running, sputters a bit and tries to die the more you rev it. seemed to get a little worse when moving the mixture screw. take the airbox off, its a little rough / loud, but accelerates fine.

thanks for all the answers you guys are awesome.

[sprocket]

Open the air box and see if it will run right.. I have seen pieces of plastic and all kinds of things in air boxes... perhaps the accident dislodged something and now it is blocking the air intake to the carb

Should be easy to find...

[bcgreatness]

i believe it to be the carb, take your scoot apart enough to gain access to the carb, unscrew the very top of the carb off to gain access to your carbs diaphram. remove the diaphram and look down into it, see the screw holding that little metal plate? take that out and the metal plate, now pull out the pin and check that. the way your scoot is acting is the same exact thing my scoot was doing right before the pin broke in it. when the pin breaks it will either get jammed up to where it allows too much fuel, or it will break loose and clog up the hole not allowing much fuel in at all. it might be the pin. also you could see if the impact shock messed up the float in the carb causing it to get stuck or something. hope thats the prob cuz its an easy fix. for about 9+ plus s&h, you can get a carb rebuild kit that comes with the needle. i wish you could buy the needle seperate but i learned that you cant lol. good luck

[bcgreatness]

oh just had another idea! do you have the tools to conduct a compression test? you should do one and see what numbers it throws out.

[Alleyoop]

Since you wrecked it and went over the curb, check the header pipe going to the motor it may have put a nice big dent and now it is retricting the exhaust.
Alleyoop

[roketafan]

sounds like the header like bc and alley are saying no worries smart free advice here all day and night lol

[bcgreatness]

what? we are not making money on this? man i got jooped! lol jk we love to help.

[roketafan]

<<<slipps bc a few pinnies for his thought