I'm not sure about that, hadn't heard of that ever happening. Do you know how to adjust the governor? Loosen the 10mm bolt on the gov arm at the engine, turn the center stub counter clockwise I believe until it stops, hold the throttle butterfly wide open then tighten the 10mm bolt. This...
Not sure if it will help but the chain needs a little bit of slack or droop. If it's too tight it will bind up and cause the engine to labor. Try another belt as suggested since it may have gotten hot and glazed over. This place has good deals on belts. Check tire pressure too, low pressure will...
Check here for GY6 parts or try Go Kart Supply.
https://hammerheadperformance.com/replacement-parts/engine/oem-engine-parts/engine-parts-150cc?p=4&srsltid=AfmBOopTBMCOvKo2cwLINHofqdYue-DEjgNsuzT0aw6RSYBmx_jUJX69
What I do is take the hook end of the spring and hook it under the cable stop screw and put the inner cable through the stop. Seems to work fine for me. Leave the weird bow type spring where it is. Here's a mock up of what I'm talking about. I don't have the original springs anymore...
This is the last kart I reconditioned and sold this past Summer. New mudder tires, paint work, new torque converter, new engine, rebuilt seat, new tie rod end. Guy bought it for his kid for Christmas. I wish there would have been something like this under the tree for me at Christmas.
I try and find the 212 Hemi version with the cast valve cover instead of the stamped steel one. I'm not sure they indicate which is which from the model number anymore. Used to be the 60363 was the Hemi and 69730 was the standard block. I went with the bigger 224cc engine once just to try it out.
You'll need this special tool to remove the flywheel. This is why I got away from working on these machines. I mostly look for 2 seater yard karts anymore. Toss a Predator engine on it with a new torque converter, rebuild the seat, throw a coat of paint on it and ride. No cumbersome 300 lb...
The one way starter clutch is bad. When you crank the engine, the one way clutch only turns one way then when the engine starts it keeps it from rotating backward.
Taken from an AI paragraph.
"A resistor in a 250cc electrical box (often part of a CDI or ignition system) reduces current, limits voltage, or manages heat to protect sensitive components like LEDs, solenoids, or igniters from overheating and burning out. It ensures stable operation by managing...
Here are some common components in a 250cc electrical box. Maybe this will help. Maybe consider both front and rear harnesses along with the parts shown to do a complete redo.
https://www.extrememotorsales.com/Parts/go-cart-kart-parts/adult-go-kart-250cc-300cc/electric-parts/#pageId=4
Without knowing exactly what machine you have it's difficult to say what everything is for or if you need those parts in question. The relay looks like the starter solenoid possibly, not sure about the resistor. Mopar used a ballast resistor in their older cars that had a high failure rate. It...