Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > 999 / 749 > 749 weird starting problem???

[KeefyB]

Yeah the starter motor does keep turning untill the engine fires,(even if you release the button)..that is normal.
Sounds like the engine may be flooded with fuel,..hence the coughing and farting.
Next time try switching off the ignition a sec before attempting starting the bike again.

[Courageous]

Thanks for clearing that up keefy. Would have been nice if they had mentioned that in the manual but there we go..... Yes it felt like flooding to me.

Nigel - what claim would I have under warranty for a poor pdi if that's the cause? Or do you think there's something wrong with a component?

[KeefyB]

Originally Posted by Courageous

Thanks for clearing that up keefy. Would have been nice if they had mentioned that in the manual but there we go.....

Quote from the 999S manual;
"This model features servo-assisted starting.Press and imediately release the start button to use the servo-assisted starting function.When you press the button,the starter motor operates automatically for a MAX time determined by engine temperature.The system disengages the starter motor as soon as the engine starts.If the engine fails to start,wait at least 2 seconds before pressing the start button again.
Allow the engine to start without turning the throttle twistgrip."
Its under the chapter 'Starting the engine',.....dunno why its not in the 749 manual.

[Courageous]

Crikey - thats exactly the info that would have cleared this up for me if it had ben there. Have a downloaded pdf manual as well as the paper one and nothing about that! I tried a little throttle too and got the engine locking up at that as if the timing was too far advanced. Thanx again, at least I know that isn't a problem now. Seems maybe its just throttle bodies or fuel adjustment that needs looking at then........ Out of interest would you know if setup is a pdi thing or factory? Trying to justify whether it was a mistake buying from a yamaha dealer now........

[Twinfan]

It's a 2004 749S thing. They're very sensitive to cam timing settings and need to be set up correctly. From the factory it'll probably be incorrect as Ducati released updated settings after the bikes were produced. You need to go to a Ducati dealer and get a full setup - cam timing, CO2 and idle. A Ducati delaer would have done this as part of the PDI but I doubt the Yamaha dealer would have.

I know this becuase I have an '04 749S too