Still over heating

[banshee99sd]

My 99 banshee is still overheating what do I do? I just put a new clutch in it and a new pro series cool head with 22 domes so I am not running anything to crazy. Also while i was seeing if it was going to over heat the engine locked up and wouldnt shut down. I hit the kill switch turned off the key and even puled the spark plug wires. I finally had to jump on ti and pop it into gear to kill it. Why is my banshee still over heating and how can I fix it. Thanks

[278]

Check for cracks around the carb boots or any kind of air leaks

[05.Banshee.SE]

Good idea letting it jump to kill itself. Another easy way is pull the choke and let it flood itself.

 

Have you done anything with jetting lately? Being way off in your jetting can cause this, especially if you don't know what air screws are.

 

It could be an air leak like 278 said also, usually the carb boots. Let us know.

[CBAIER1206]

Yeah, somethng is definately wrong... do you have a temp gauge and if so what temp is it reading? If not, then how do you know it's overheating? Is the bike running lean? Have you checked you plugs and re-checked your carb settings? An air leak might also cause a lean condition...My cub never breaks 145 degrees. I run a coolhead and engine ice for coolant.

[AKheathen]

yah mine did that once. i stopped, cus it started to run funny, then it ran away, etc. i had forgotten to tighten up the carb clamp up on the intake. fixed the leak, checked the airscrew adj. and went riddin some more. really lucky! :sweat:

[banshee99sd]

Did a smoke test around the intakes and didnt notice anything. Is there an easy way to check all the intake boots without having to remove everything? Also I talked to Alba here in town and they said I might have slipped my woodruff key any body know anything about that and how do I check it. Also i dont know S**t about carbs so how do I adjust and how can I tell if my jetting is good.

Edited January 24, 2009 by banshee99sd

[lowbuckracing]

To check for air leak you can also use carb spray around the intake boots,head,bottom of cylinders to see if it starts reving up higher.also look at a carb diagram for a stok set and find the air screw..turn it all the way in,then back it out 1in a half turns.do it to both sides.Sounds like you may have alot of carbon build up on the pistons as well,they will keep running even if you unplug the wires , there is to much carbon built up..good luck..JB

[banshee99sd]

I sprayed carb cleaner and nothing happened so that is a god thing. Did a compression check and the left was about 110 and the right was about 100. I did notice when i put the cool head on that there was some carbon build up. Is there a way to clean this with out taking the head off?

[lowbuckracing]

if that is the compression it is time for a rebuild......fresh top end.....check ur water pump while you have it tore down...Good luck..JB

[2001Stroker]

I think you have an air leak. Reving up and not cutting off with spark plug wires off is an indication of lean conditions. Are you losing any transmission fluid? Or, have you noticed any pressure in the transmission? Dip stick smell like 2-stroke gas? You can also leak air where the cases meet. You won't be able to find that leak with a can of carb cleaner, or smoke. I would do a pressure test on the motor.

[NitroTate]

Like lowbuck said, it's pretty close to rebuild time especially since your cylinders are near 10psi different from one another but that isn't necessarily the overheating problem so you you might want to solve that problem first before you rebuild so you don't blow a new top end.

 

Do a leakdown test and check your impellar. Flush your cooling system to make sure there are no blockages. But yeah like everyone else mentioned, that is a symptom of a lean condition so try to find that for sure.