Starting with COLD engine

[Speedo007]

Lately I sometimes have trouble starting the bike when it's cold. It sometimes takes 2-3 starts to get it going and it starts a bit rough, then evens out.

Anyone seeing this?

By cold engine Im not even talking as winter cold, just parked in the shed at 15C. Once it's been started the rest of the day its starts pretty easily.

The bike has 3500km on it and have always used premium gas.

[mano1192]

I had a problem starting my bike one morning also, wasnt too cold either. I learned that I need to hold the starter for a little bit longer, when you feel like it should start just hld it for 1 more second and it helps fire it up.

Could just be the factory spark plugs are garbage, proboly not a bad idea to get some good plugs on these puppies.

[trixster8]

I noticed the same problem after changing my oil, but I didn't think that would cause a problem. I also noticed that my idle was lower than what the manual suggests, so I adjusted it to around 1200rmp.

[Speedo007]

note taken on the spark plugs...also will check the idle once it gets warm...Thanks guys.

[Dr_Doom]

I noticed the same thing and I figured out that I had to hold the starter for a couple of seconds after it starts.

[tiagovsilva]

HI,

I have the same behavior starting my FZ8.

Up to +-2500km the bike started up instantly. In the moment that i click on the start button, the engine began to work immediately and the rpm's were very stable.

After riding 2500km the engine began to have difficulty starting (cold start)...

Sometimes i need 3 attempts to fire it up, and when finally the engine start
working, it seems a bit rough... after 3 or 4 seconds the rpm's stabilized.

This happened only at cold starts... morning and the evening
(with the engine stopped about 8 to 9 hours) ... during the day, the behavior is normal ..

I learned that, to get the engine starting at the 1st attempt, i need to push the start button longer than normal ... more 1 or 2 seconds.

I took the bike to the shop and they tuned the idle speed that was at 1000rpm (with hot engine) to 1200rpm's.

They also made the throttle bodies synch...

After these adjustments .. the engine start seems better .. but never, as
was at first 2500km.

I still have to push the start button longer than I consider normal.

Anyway, looks better than it was ...

Have any of you resolved this issue? or discovered the cause?

Here is a video of what happens:

YouTube - ‪demarrage fz8‬‏

YouTube - ‪demarrage fz8‬‏

Thks,

Tiago

[Shleeve]

mine is brand new still under 200 miles and it does that sometimes on cold start, i just hold the starter in until it fully starts. Seems pretty normal to me.

I came from an '87 Ninja 500 and a '96 CBR F3 that both took frequent choke/idle adjust and lots of cranking and gooseing the throttle to get started so this bike starts great to me lol

[tiagovsilva]

Hi,

I know what you mean, but this is not my first bike.. owned, hornet 600 (carburated), ybr250, xj6 (the new one).. and all of them starts instantly.

My last bike XJ6 (FZ6r) with many miles on it.. allways started on the fly.
The FZ8 too, but now, it becames lazy. Even more in a modern fuel injection engine.



After you start the engine (cold start), it works roughly too (unstable idling), for about 2 or 3 seconds?

I'm with about 4000km now, and the behavior is the same..
I found this post here in the forum, and it seems to me, that other people have the same issue...

thks,

Tiago

[Hereward]

Mine dose it too, ocasionaly. I put it down to the dual throtle system and fuel injection system........it's all a bit too clever at times and trips up over itself. If it starts rough a quick blip on the throtle sorts it out instantly. From reading this thread it dose seem to be normal for this bike ond not an isolated issue.

[mano1192]

Originally Posted by Hereward

Mine dose it too, ocasionaly. I put it down to the dual throtle system and fuel injection system........it's all a bit too clever at times and trips up over itself. If it starts rough a quick blip on the throtle sorts it out instantly. From reading this thread it dose seem to be normal for this bike ond not an isolated issue.

Hitting the throttle slightly hasnt worked for me. Its been around 75-80 here in Vegas and it did this to me again this morning on first startup of the day, took friggin 5 times to get it to start. Its damn embarrassing too as my hot neighbor was staring at me I'm like "I'm not a dumbass I really do know how to start the bike"