Starting Issue (Such a Strange Problem)

[BikerBoyz]

hey there, I own Busa 1999/1 (First month model)

i have some problem that i couldn't solve it

I expect someone can give me an advice

Let's see

When the engine's hot

It's hard to start it up

I must wait approximately 1 hour!! My Busa allows me to start

But the obstacle which I really doubt is It can start immediately after turn off the engine in 30 min

It cannot start if i turn it off 30min afterward
So that I have to wait an hour My Busa will be started

I personally thing I might be my Battery 'Cause I've used YTX9-BS Battery

It had should be YT12A-BS following the manual instead

What do you suggest me??


i'm from thailand???
and english has been my trouble

Let the good times rolls
Thanks you all

 

[denon970]

clogged open injectors??? slowly flood the cylinders after shut-off, but the fuel evaporates after an hour.

 

[delbert]

they suffer with fuel vapour lock issues , basicly the fuel in the pump evapourates and causes an air pressure lock , once the engine has cooled the gas turns back to liquid and your good to go .
i stripped and cleaned the pump on mine ( changed filter & cleaned all screens) they were well chocked , made sure the lagging is around pump properly and had no issues since
do a search on this you may find some more info
good luck

 

[BikerBoyz]

A week ago after I had come back home then I turned off the engine

waiting 40 min and Started it up

It couldn't work that It was

Next
I connected bike battery and car battery together
Held the cluch,press a start button
It was able to work!!!

After that the slow-running was not calm

I have to turn off and start it again

The slow-running become to be calm

???

 

[delbert]

thats about right , left standing for 40 mins the heat builds up around the pump and evaporates the fuel, Do you notice when it wont start that the pump makes a different sound when you turn the ignition on ?

i would bet this is your problem

 

[BikerBoyz]

OH!!! yes yes

sound is nothing from the pump

a pump seems like It didn't work

But!!
I doubt After connect battery from car

Why was it able to start??

 

[aussiekeeper]

Maybe an electrical problem. Could be the starter is heat soaking after shut down. If you can start it with a jumper, sounds like the starter has too much resistance from the heat.

 

[dmallord]

check your battery

 

[Commuta_Busa]

get the right sized battery on the bike to eliminate that as a cause.

then see if it's a vapor lock issue.

 

[Professor]

An undersized battery can easily cause some serious damage to the bike if you have a "kickback" while trying to start it. The early models, 99-2002 are more easily damaged. Get the proper (and a high quality) battery before continuing.

 

[delbert]

OH!!! yes yes

sound is nothing from the pump

a pump seems like It didn't work

But!!
I doubt After connect battery from car

Why was it able to start??

could just be a coincidence , all good advice here , check battery is good then look at vapour lock issue ,

has the pump ever been stripped & cleaned ( properly)

also i heard a rumour ----- next time this happens remove fuel cap & raise tank ( not to loose fuel out of said hole ) then turn ignition on & off a few times ,, this is said to remove air lock

just a thought