My son has a 2013 CRF250L (20k miles) which has developed a fault, wonder if those with more knowledge than myself could give a few pointers?
Owned 6 months, was running fine and has completed several all day trail rides and numerous local trips until recently developed a low rpm stutter that feels very much like fuel starvation. It won’t cut out, but opening the throttle will result in ‘bogging’ and a reluctance to accelerate. Sometimes it will pull through and rev cleanly, sometimes a persistant hesitancy that makes riding impossible. It has got him home but with some difficulty.
Suspecting fuel, I’ve removed the fuel pump and given it a clean - there is no inline filter, rather a gauze at the fuel pick up inside the tank. It wasn’t spotless but then wasn’t caked in gunge either. I also replaced the air filter, spark plug and gave it an oil/filter change.
Initially this made no difference, but after adding some FedEx fuel system cleaner (at higher than normal dilution but safe according to the FedEx website) the issue cleared. Solved I thought! After a problem free 150 mile ride and leaving it overnight, the issue has returned. More fuel cleaner and another pump clean hasn’t cured it this time.
Googling suggests a plethora of possible issues from dirty throttle body, dodgy ht lead (though the first problem fix with cleaner seems to discount this), blocked cap vent (cleaned), fuel pump connections (all appear ok), knackered fuel pressure regulator, tps sensor, injector etc etc etc.
I’ve priced a new fuel pump via Honda and it isn’t cheap! Local bike shop will carry out a check (diagnostic £90) which seems the next logical step though there isn’t any fault code indicators showing on the dash.
The bike starts fine and ticks over evenly, I can hear the pump prime. Gently open the throttle a few hundred revs and you can feel a hesitation, open more, particularly if abruptly, it bogs down. Continue and get the revs much higher up and it revs cleanly but it can’t be ridden like that.
I’ve exhausted my mechanical nous, is there anything I should be checking before admitting defeat and ferrying it to a man who hopefully can
Owned 6 months, was running fine and has completed several all day trail rides and numerous local trips until recently developed a low rpm stutter that feels very much like fuel starvation. It won’t cut out, but opening the throttle will result in ‘bogging’ and a reluctance to accelerate. Sometimes it will pull through and rev cleanly, sometimes a persistant hesitancy that makes riding impossible. It has got him home but with some difficulty.
Suspecting fuel, I’ve removed the fuel pump and given it a clean - there is no inline filter, rather a gauze at the fuel pick up inside the tank. It wasn’t spotless but then wasn’t caked in gunge either. I also replaced the air filter, spark plug and gave it an oil/filter change.
Initially this made no difference, but after adding some FedEx fuel system cleaner (at higher than normal dilution but safe according to the FedEx website) the issue cleared. Solved I thought! After a problem free 150 mile ride and leaving it overnight, the issue has returned. More fuel cleaner and another pump clean hasn’t cured it this time.
Googling suggests a plethora of possible issues from dirty throttle body, dodgy ht lead (though the first problem fix with cleaner seems to discount this), blocked cap vent (cleaned), fuel pump connections (all appear ok), knackered fuel pressure regulator, tps sensor, injector etc etc etc.
I’ve priced a new fuel pump via Honda and it isn’t cheap! Local bike shop will carry out a check (diagnostic £90) which seems the next logical step though there isn’t any fault code indicators showing on the dash.
The bike starts fine and ticks over evenly, I can hear the pump prime. Gently open the throttle a few hundred revs and you can feel a hesitation, open more, particularly if abruptly, it bogs down. Continue and get the revs much higher up and it revs cleanly but it can’t be ridden like that.
I’ve exhausted my mechanical nous, is there anything I should be checking before admitting defeat and ferrying it to a man who hopefully can
