2024.5 fc250 bog/die off idle when twisting throttle fast

havokeachday

I have a 2024.5 rockstar fc250f with 66 hrs. Today, warming it up, i went to rev it lightly and it bogged. If i twist it quickly and don't let off it will die. If i start with the engine rpm near choke speed, it doesn't bog or die. I did the top end 4 hours ago, it started doing it probably 20 minutes ago (engine time)

I have a brand new bike 0.2 hours that i used to rule out the following:

Fuel pump/filter

Ecu

Coil

Spark plug

Throttle body/injector

Air filter

Fuel

My suspicion is timing as i had troubles with the cam chain tensioner , but it seems to run well once it gets past the idle bog. Any suggestions?

 

|
wrc777
Profile picture for user wrc777
Posts
3214
Joined
5/21/2020
Location
Greenwood, IN, USA
Fantasy
142nd
wrc777 12/13/2024 6:40am
12/13/2024 6:40am

Try the voltage regulator. 

1
havokeachday 12/13/2024 8:57am
12/13/2024 8:57am
wrc777 wrote:

Try the voltage regulator. 

Thanks for the suggestion.. unfortunately I started removing the engine to replace with my backup... if it still doesn't run, I'll try that as the first next step.

havokeachday 12/13/2024 10:09pm
12/13/2024 10:09pm

I ended up swapping the motor with a different one and that solved the issue.. now time to crack open the bad one...

Post a reply to: 2024.5 fc250 bog/die off idle when twisting throttle fast