Slight problem, bike seems to chug a lot, any advice?

[BlackStallion]

I changed my spark plug a couple of days ago, i fitted an Iridium instead of Standard.

Since that change i realised an increase in power when in 5th.

But now my bike is chugging a lot when changing gear

It shudders a bit and it never used to do that, always had clean gear shifts, nice smooth acceleration and no stuttering whatsoever...

It must be something to do with the spark plug, but i'm not sure?

Another thing, i had to take my cylinder head cover off to get into the hole to unscrew the spark plug, as i didn't have a tool small enough. Which was a pain in the arse.

You don't think i disturbed anything?

This is the reason i fitted an Iridium plug, as it's such a chore to change it.

Please help guys

Thanks in advance

[BlackStallion]

Anyone?

I'm hoping to sort this out tomorrow...

By the amount of replies, i'm taking it that this is a pretty stupid post, i bet there is such a simple explanation...

I'm just not 100% with the mechanics of bikes

[T0MMY]

Don't think it's a stupid post, just nobody knows the answer

Is it steam powered at all? Have you checked the coal?
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ZX6R + CBR600RR

[Paulington]

Could you have disturbed the head gasket if you took off the cylinder head? Since it's under load when changing gear it could be blowing past.

Or a dodgy spark plug surely?
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"Four wheels move the body, two wheels move the soul."
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CBT: 27/08/08. Theory: 04/09/09. Module 1: 16/09/09. Module 2: 01/10/09.

[BlackStallion]

yeah hopefully, don't want to look like a complete idiot.

No it isn't steam powered, just oil cooled.

You don't think it's the engine oil?

Air filter?

Anything?

Thanks for the reply T0MMY

[ms51ves3]

[T0MMY]

He wouldn't have taken off the cylinder head, just the cover.

Have you checked the sparkplug is tight enough (1/4 to 1/2 turn beyond hand tight)?
Is the lead firmly attached to the plug?
Is the plug gapped correctly?
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ZX6R + CBR600RR

[Ariel Badger]

Stick the old plug back in, any raise in power is purely imaginary. BTW it is not nesesary to take the head off to change a plug.
____________________
Bikers make great organ donors, get 115 on your licence today.

[Paulington]

[BlackStallion]

What would it do if i disturbed the head gasket?

It's quite weird, as i was out on my bike earlier, and it didn't chug once, then on the way home it started again. I'm shifting properly, i'm blipping the throttle when changing gear, i'm riding it correctly, just a problem mechanically.

I hope it isn't the spark plug, hate to change it again. I don't think it is as it's been starting up brilliantly, top speed hasn't lowered or increased, just the chugging every now and then...

[Paulington]

[Moo.]

Cant you get a cheap spark plug wrench to get it our easier?

I would've thought maybe an adjustable spanner might get down there aswell..
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A2 Passed 18/6/10

[That_Hornet]

Sorry to sound simples. But have you checked the chain?

[T0MMY]

Did you get the toolkit with the bike? It should have a suitably narrow spark plug socket.
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ZX6R + CBR600RR

[BlackStallion]

Yeah, i never saw the cylinder head, it was just the cover with the oil in and the centre hole where the plug was.

To T0MMY

I have to admit, although the spark plug was the same one, just in Iridium, it didn't seem to screw down as far as my standard one. I screwed it as far as it would go, not hand tight. I take it i need to adjust the tightness?

You mentioned 1/4 - 1/2 turn?

Really appreciating the help guys.

[Paulington]

[BlackStallion]

[T0MMY]

You have to be very careful not to strip the thread! Just do the spark plug up with your hand and make sure the thread's not crossed then when it's hand tight use your wrench to add another 1/2 turn.
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ZX6R + CBR600RR

[BlackStallion]

[T0MMY]

If you tightened it too much you may have stripped the thread from the cylinder head. Like I said, do you not have the toolkit that came with the bike?
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ZX6R + CBR600RR

[BlackStallion]

[Ariel Badger]

[BlackStallion]

[Ariel Badger]

When you unscrew it count exactly how many revolutions it takes, then count how many threads there are on the plug. the number of revolutions should be the same as the threads. If it is less you may well have crossed it. Did it screw in easily or did you need to wind it in hard all the way with a spanner?
____________________
Bikers make great organ donors, get 115 on your licence today.

[BlackStallion]