I just purchased a SUNL 90cc Quad and it has a speed limiting screw. I have the screww turned all the way in but the quad still moves too fast. At full throttle with the screw turned all the way in, the quad putts away slowly and then keeps building speed-too much speed. It is supposedly rated for 5 to 37mph. I want it to go about 8mph to start my son out but I can't get it that low. Is there any electronic device I can add on to dial in the speed I want or is there a mechanical adjustment that I need to make to the Quad? Please help, I can't use the machine as is.

 

The screw is the only way to limit it-but if you play with it you should be able to keep it under 10 mph-you can also kill the engine with the remote if they get going to fast-my 4 year old learned on a sunl 90-you have to teach them to control the throttle-not give all they can

 

So aclark,do you sell parts also?How often do these take a crap?Bought one and was going to buy another but after the first time the it was taken out a really rode it shot craps.So now we are thinking its not a good idea to get another one.Thank god for the w/g from the dealer but after six months then what?I know they are cheap but still a little cashy to be disposable.

 

from reading your other post it sounds like you bought this for an adult to ride-I dont know how much you weigh but your going to put alot of wear on it.

 

You are correct!!It was bought for a adult.I talked to the dealer about this before I bought it.Told them what it was being bought for ect....I weigh les then alot of 10-12 year old(girls) with out telling my weight.Most 10-12 year old boys out weigh me by alot.