Hard/No Start

fish · Jul 18, 2005

Hello Bergerites,

I am just about reaching the end of my tether.

The main bearings recently failed on my '02 fs650.
It was stripped down and all internal bearings replaced and put back together.

However, now the bugger won't start.

The ignition timing is correct (right hand line at TDC)
The rockers have been reset.
Carb cleaned out and on stock settings.

The only thing I found wrong was a broken wire that goes to the front brake light switch which was earthing out (now fixed).

The only life it is showing is when it kicks back trying to break my ankle. This happens with choke and a little throttle (I know don't use throttle). It has tried to fire twice but didn't pick up anfter the first splutter.

Can anyone help.

Maybe stator but the appears to be in tolerance. If the stator could be suspect could I try the one off my perfect FC600 '99.
Idle jet? (1 1/2 turnsout).

Reward to UHE if anyone can help sort.

berger · Jul 18, 2005

1) Check for a good spark
2) Pull the plug...any sign of fuel?
If 1 and 2 are Ok, I would suspect valve timing. You may want to pull the clutch and rocker covers and make sure all is in alignment. I know it is very easy to have it 1/2 a tooth off.

fish · Jul 18, 2005

Cheers Berger,

I'll check this tomorrow evening.

There is a spark and the plug is getting wet.

Any idea why it is kicking/sptting back. What causes this?

risky1 · Jul 18, 2005

I think that operative term here is "GOOD" spark. If the spark is present but weak it is a no go..... I believe yellow spark is considered "weak" we want a hot blue/white spark.

I am not sure about the use of a 99 stator on an 02. my recollection is that it will work.

berger · Jul 18, 2005

Kickback is most likely timing related.

Taffy · Jul 18, 2005

all you need to do is get the bike to TDC on the compression stroke using the ignition mark on the right and then pull the rocker cover off. turn the engine over exactly 360d and then the lobes MUST be symetrical!

that would explain the kick-back but more than likely this would disap[pear whrn the bike is running again.

regards

Taffy

schwim · Jul 18, 2005

timing is everything!

heya fishie,

another vote for timing. If your timing is too far advanced, you'll spark on too early on the compression stroke, which will attempt to reverse the spin on the engine.

thanks,
json

fish · Jul 19, 2005

That Taff,
could you explain what you mean by symmetrical.
Am I right in thinking that at TDC compression the lobes should be pointing down and by turning the crank 360d they should be up? Sorry for what maybe a basic question for you but I only have a fairly basic knowledge of engines.
Also could explain why doing this would explain the kick-back?

Schwin,
As far as I can see the timing is bob-on (right hand mark @TDC). Am I right in thinking that if the stator timing mark was between the two fly-wheel marks then this would be advanced?

Many Thanks

crashnberg · Jul 19, 2005

Hi there, does the engine spin freely? ie if you take the plug out, if a bearing is incorrectly loaded it can bind the crank slowing the kick procedure enough to cause kickback even if everything else is ok. I'd definetely check the valve timing though - most likely. ***

scoot · Jul 19, 2005

fish said:
That Taff,
could you explain what you mean by symmetrical.
Am I right in thinking that at TDC compression the lobes should be pointing down and by turning the crank 360d they should be up? Sorry for what maybe a basic question for you but I only have a fairly basic knowledge of engines.
Also could explain why doing this would explain the kick-back?

Schwin,
As far as I can see the timing is bob-on (right hand mark @TDC). Am I right in thinking that if the stator timing mark was between the two fly-wheel marks then this would be advanced?

Many Thanks

The lobes on the cam should point down at tdc. When i put my new cam in i put it one tooth out on the cam wheel. This made for interesting starting but when running was really smooth and linear. Put engine in tdc on comp stroke with the rocker box off and check for this little mistake.
Chris

Taffy · Jul 19, 2005

scoot

but to actually check whether the lobes are correct you need to turn the crank 360d which is 180d at the cam. this now brings the lobes back up! now that you can see them you can guage whether they're out slightly.

'mickey mouses ears' should be symmetrical down to the mineutest degree if you can and if in doubt let the cam tilt forward on the bike so that with camchain wear the timing will become good.

when you you're happy with everything you turn the crank again 360d, the lobes point down and then you replace the rocker cover!

regards

Taffy

Hard/No Start

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