Overheating engine on a gocart

[rainier1822]

Hello everyone, this is my first post but ive found this forum super helpful. Long story short i put a '80 cb750c engine that was going to be scrapped on a gocart

as you can see from the picture theres no airflow. it overheats after 10 minutes with the heads getting to 367 degrees and the pan getting to 262
ive seen people put the cb900 radiators on them but i was wondering how efficient they are? how can i get the most possible cooling that I can? how well do the filter adapter coolers work like this one?

I apperciate any advice and look foward to hearing replies!

 

[mrtwowheel]

I would say, change the seats, shorter, narrower, maybe those plastic molded schoolroom seats. Can you move the seats forward any? An electric cooling fan for an auto mounted between the seats? Looks like a fun buggy. Keep the thing moving or shut it down. Oh, I see now that is one seat, well same thing, go smaller.

 

[brettp]

Is it building oil pressure? I was under the impression that although the motor is air cold, oil helped dissipate heat as well.

 

[Loose Chain]

I would say you need to put some type of air scoops on either side of the seat, over your head and underneath to direct as much air around the engine as possible. The cooler needs to be in the air stream as well. It won't last long if you don't.

 

[Bo82CB]

Build an shroud with scoops coming out each side of the seat. Mount biggest spal hi flow fan to blow over the head...

 

[mrtwowheel]

Cut the frame in half and add pieces to make the frame longer for more air space around the engine.

 

[madmtnmotors]

Are the crankcase vent(s) free to vent? I know the 77/78 (and possibly others) SOHC models vent the valve cover into the air cleaner. If you delete the air cleaner and simply cap this vent then the engine will promptly overheat (ask me how I know... ). The most common way of addressing these are with a filter on the end of the vent line to help reduce the oil vapor discharge.