2003 Busa stalling at first morning clutching





WWJD

Donating Member
Registered
#1
I have 2003 Busa with 1070 miles on it now. most mornings when I first take off after just starting in 1st, when I clutch in ready to break for my first stop, the engine will stop or stall. I allow about a minute of choke max on start up, and then let it warm up while I inspect it and put on all my gear. Then I sit it strait up and watch the clock for another minute before taking off. Am I not allowing enough warm up time still? Seems to run fine otherwise, it's just that first stop that seems to stall it. My idle is usually 8-900ish. Is that typical. That's all the time not just warm up. I don't have a service manual yet.

Also there is this high pitched whistle sound, kinda quiet, but it's there. Been there since I bought it, hasn't changed since break in and only noticeable while standing still. Is that normal for anyone else?
 

fatjap

Registered
#2
The high pitch whine is the fuel pump.

As far as warm up goes. When I bought my 2002 the shop owner said 3 minutes at least and that it was important to get it to operating temp. This was in Japan at a well known shop.

Also check the kick stand switch, it maybe loose.

FATJAP
 

WWJD

Donating Member
Registered
#4
Thanx guys for your info. So it's a NORMAL whistle sound from the fuel pump or should I have it serviced?
 
#8
yea what the other guys said about idle it's to low,and does the whistle change pitch when flipping on brights ? my stator makes a whistling noise when cold.
 

WWJD

Donating Member
Registered
#9
yes, revving or electrical changes like highbeam does seem to affect the whistle sound. odd.

Stalled again this morning - twice on me! After accellerating hard in second and clutching in before braking up to a stop, rpms drop all the way to ZERO. Quick clutch pop got it going again since I was rolling but, I'm not impressed. BUT, I didn't do a five minute warm up like usual this morning and should have. More like 2 minutes. Thanks again for all the advice and knowlege
 

WWJD

Donating Member
Registered
#11
Will do! Turning up this weekend. I am still having the stall problems, but it HAS TO BE warm up related. It's fine after a few more minutes - oddly, wasn't a problem until after my 600 mile checkup. It's HARD to just SIT THERE on a busa for 5 minutes while warming up, but, alas, the pros outweigh the cons in a BIG way.
smile.gif
 

WWJD

Donating Member
Registered
#12
Tested this AM and it works much better with the idle set right. Set the idle, solid 3-4 minute warm-up, rode normal with no stalling.
smile.gif
Thanks!
 

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