PRO RMK 800 2015 shutting off at high RPM
When it shuts off, does it just stop altogether? Sudden Dead stop or a pudda puddda pudda pudda puddda stop? What happens if it sounds like it is going to quite and you back off to about half throttle? Does it catch and stay running and pickup performance or does it quit anyway?
A) One scenario is it is cold seizing
B) Another scenario is it is reaching momentary high temperature which triggers the electronics to retard timing (staggering rpm) or even shutdown if spikes too high.
For A, ensure the entire power system is thoroughly warmed up before going hard to the bars.
For B, there may be an air pocket in the cooling system or some issue with coolant circulation. Look for hose kinks. Burp and bleed the cooling system. Water pump belt or pump impeller issue.
C) intermittent electrical fault. Wire shorts or bad connections, failing stator, scrambled cdi/pcm
When you mash the throttle and go hard on it, that spikes piston and head temperatures. So look for things that affect cooling and the built in system safety controls around that scenario which is protecting the engine from the operator, you.
What happens if you are more gradual in opening up to full throttle?