Re: Engine overheating

Thread approved.

Re: Engine overheating

I am no expert on the subject but there are three possible reasons (under normal circumstances) I can think of why the engine shuts down because of overheating at high RPMs.

(IMPORTANT - It is normal for some bikes, mostly with ECUs, to cut off engine power when you rev them beyond 9k RPM or after the red line to avoid engine damage but if you are sure that it only started happening recently, then read on)

1. Engine Oil may have gone bad or the quantity may have gone down.

When was the last time you assessed the level and quality of your bike's engine oil? May be it needs to be replaced. Make sure you use the recommended grade Synthetic engine oil when you change the old oil.

2. Coolant level and Radiator fan

Have you checked the coolant level and whether the coolant pump is circulating the liquid to cool the engine?

Check if the radiator fan is working and if it is, see at what engine temperature the fan starts spinning.

I am unaware as to what temperature your bike's engine should reach for the fan to activate - do check the owner's manual or on the Internet.

3. Temperature Sensor malfunction

Although chances are less, a malfunctioning temperature sensor could trigger the Engine cutoff by sending incorrect temperature signal to the ECU.

NOTE:
The faster you ride, cooler your engine should stay but if you slow down when the engine has reached higher temperatures, it takes longer to cool down the engine because it has to rely only on the fan.

Re: Engine overheating

When you revving the engine very high, burning plastic smell is alright. When did you last change your engine oil? Get your carb tuning done by a good mechanic or if you are a DIY guy, search P220F thread to tune it yourself. Check your radiator fins for bends and damage, coolant level and if its older than 2 years change coolant.