Engine issues

H

hallsten

contributing rider
Joined
Jun 3, 2024
Messages
10
Location
Taiwan
I bought a 401 2022 euro5.
When start the bike, it always stall the engine and I need to re start.

When driving, engine dies at around 6000rpm and if there is momentum with the bike, like in 3rd gear, it start again after like 2-3 seconds.
If it’s low speed, the bike dies and I need to start it with the starter button.
When braking and slow down toward a read light, bikes dies some times.
When standing still and accelerate away, normally die on first or second gear.

Some times CEL blink and light can stay on. Code was P0301. We changed the ignition coil and spark plug.
Air filter is ok.
Previous owner state to have changed fuel pump and fuel filter.

I can see rust in the fuel tank.
Can it be the breather hoses that limit the fuel?

Next step would be to change injector and I read many people have issues with clutch sensor.

Any suggestions?
 
It certainly doesn't explain all of your issues, but part of it might come from the quick shifter:

A lot of people complain of random cutouts, and these can easily happen if you're resting your foot on the gear selector (which is a reasonable reflex). If I'm not mistaken, the quick shifter cuts your throttle while you go from one gear to another (up or down). Applying a little bit of pressure to the selector can thus trigger the cut without actually changing gear, resulting in a stall. I usually try to keep my boots very clear of the selector and haven't had issues with it.

Let me know if this helps at least a little bit!
 
If it were me I would start with the simple things like disconnecting and jumpering the sidestand. On mine with it running and the clutch (in in first gear or any gear) if you just move the sidestand down 1/2" the bike will die. Just seems too sensitive to me.

Then if that is not it I would check all the grounds to make sure they are tight.

Hard to believe a 2022 has rust in the fuel tank. So give the fuel filter a good look over.
 
Maybe hard to see, but the rust is all over the lid and hits hard to open and close.
 
I changed the fueltank, with pump, filter and the lid.
New ignition coil and sparkplug.
Afetr that the shop changed teh clutch sensor and adjsuted the quick shift sensor.
Now shoudl be ok.
 
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