Roketa mc 75 150cc Racket on hard pull By devldj (Read 1,642 times)

[devldj]

Hello and ty for allowing me to join.
Have found when the mrs joins me on the bike and we take almost any kind of incline that needs me to give it gas a terrible racket, metallic, coming from the front of the bike. As soon as we are on flat ground again it sounds fine. Occassionally will do it on a flat if I open the throttle full getting onto the highway. I have looked all over the bike and can not seem to find a reason. Any suggestions would be greatly appreciated.

[mapbike]

Is it a pinging metal to metal sound or is it more of a low tone growling type knocking?

I ask because some of the knocking type sounds seem to be common on the 150cc GY6 engines mine makes what seems to be a knocking noise under hard acceleration but it is actually just a deep throaty almost knocking type sound that comes from the carb. and air cleaner when the engine is under a hard load at full throttle but as RPM's increase as well as speed the load is reduced on the engine and that sound starts to go away once a good speed is acheived, if the sound you are hearing gets louder and fatser as the engine revs then I would say you do have a mechanical problem or something is lose, but if the sound goes away when the engine levels out then I would not be worried about it because it is likely just the normal sound of the air being gulped into the carb while that little engine is under load.

Someone else may have another idea that I have missed here but you may not actually have an issue for worry unless it has never done it before and it just started the "Racket on a Hard Pull"

Is your scooter NEW or do you have some miles on it?
Shan

[devldj]

sounds more like metal to metal. Thought perhaps it was the exhaust at the manifold but that is nice n tight. Two years old now with app 3500 miles on it (love it and ride it alot lol). It has always made this noise since I got it (new) when we take an incline. Again this is mainly only when the mrs is on with me and on a hard incline. Ty appreciate your input very much.

[mapbike]

Well, if she is still running strong after 3500 miles and it has done it sense it was new I would say it's probably ok, if it were a major issue in the engine it would have quit on you by now, I say just keep looking if it really bothers you but if it aint all that bad and you can live with what ever it is I say just ride the heck out of it and enjoy, if something falls off some day and the noise stops then I would say you found your moise maker....LOL
Ride safe

[kevinharrell]

Are you running high test gasoline? If not give it a try.