Lexmoto Hunter

[Joe_Cawthorne]

I have a lexmoto Hunter 50. The other day I was riding it and suddenly it started losing power when I went over like 20% throttle. I have replaced the spark plug and played about with air fuel ratio and it hasn’t made a difference. I removed the airbox and it drives absolutely fine.

Any suggestions?

[Codswallop]

Is the scooter carb or efi? If carb, could be a blocked main jet. Pilot jet fine on light throttle, but blocked main causing problems.

[Joe_Cawthorne]

It is a cab. I don’t get why having the airbox off works but when it is on it doesn’t.

[Codswallop]

Maybe an issue with choke? Running too rich, which removal of airbox helps with. Either way, it may be a good idea to get the carb off for a look to ensure it's all clear and set up correctly.

[Joe_Cawthorne]

I’ve just taken the carb off but I don’t really know what to look for.

[DirtyHarley]

Joe,
It depends how many of the modifications you've made that you've posted about over the last couple of months:

https://www.pistonheads.com/gassing/topic.asp?h=0&... <- derestiction thread
https://www.pistonheads.com/gassing/topic.asp?h=0&... <- oil issue thread
https://www.pistonheads.com/gassing/topic.asp?h=0&... <- other oil issue thread
https://www.pistonheads.com/gassing/topic.asp?h=0&... <- making it louder thread

Did you change the exhaust in the end? or take baffles out? if you're running rich then taking the airbox off will help with this temporarily but you shouldn't run it like that or you'll risk bumming the engine.

The other thing to remember is that it is only a chinese 50cc ped and therefore is fairly limited in what you can do with it - see far too many young lads buy the cheapest ped they can and then try to make it faster, louder, or flashier at the expense of an already fairly limited lifespan.

[Joe_Cawthorne]

What is a long term solution for it instead of removing the airbox?

[xeny]

If it suddenly happened have you checked you've not got some debris sucked into the airbox that is clogging the filter?

[Joe_Cawthorne]

Yes, I have looked in the airbox and have cleaned the filter.