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fireblade gear clunk

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flumpy7
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PostPosted: 20:51 - 07 Oct 2010    Post subject: fireblade gear clunk Reply with quote

Hi guys

Now i know honda gearboxes are clunky, but my 2001 'blade has developed an annoying habit of clunking at times other than when i initially click into gear.

Its most noticeable in first and second when pulling away quickly. As i roll the throttle and meet the biting point that is when i get a cluck from what seems like the gear box or front sprocket area. It also happens if i decelerate quickly in these gears. I've had this happen on other bikes when i really hammer it but its happening all the time on the blade. The sound is very similar to the clunk you get when you click into first.

I have recently changed clutch cables and chain and sprockets so i guess it could be something i've fiddled with although everything seems sound. Any ideas appreciated.
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Willson
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PostPosted: 20:53 - 07 Oct 2010    Post subject: Reply with quote

I have the same problem on my ER5. I adjusted the clutch lever and it's all gone.

Personally I think it's the gear engaging too quickly, as if you're dumping the clutch.
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Acemastr
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PostPosted: 21:30 - 07 Oct 2010    Post subject: Reply with quote

I get a clunk when i throttle on quickly from none, or let off quickly, it'll also do it if i blip the clutch as if i'm going to wheelie.

God knows what it is unfortunately.
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DrDonnyBrago
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PostPosted: 21:41 - 07 Oct 2010    Post subject: Reply with quote

Acemastr wrote:
I get a clunk when i throttle on quickly from none, or let off quickly, it'll also do it if i blip the clutch as if i'm going to wheelie.

God knows what it is unfortunately.


Checked your cush drive recently?

Series of rubber things in the back wheel to dampen the transmission of power from the engine to the wheel. As they age they harden or compress losing their damping ability. Two options if they have gone hard and compressed, 1st is to replace them, second is to fill the space left by the rubber being compressed by filling the gaps with slices of plastic milk bottle. It wont be as smooth as replacing them but should alleviate most of the clunk.

If you rode a newer FI CBR then it could be an artifact of the FI system, your carbed model should be nice and smooth though.
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flumpy7
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PostPosted: 23:12 - 07 Oct 2010    Post subject: Reply with quote

Quote:
Checked your cush drive recently?


Well my cush drive rubbers are fine as i had the rear wheel off recently to paint it and had a good look at everything.



Quote:
I have the same problem on my ER5. I adjusted the clutch lever and it's all gone.


Thanks Willson i'll have a play....the thing is though, i kind of have it adjusted to the level i find comfortable. Maybe if i adjust the other end a bit to compensate...what do you think?
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c_dug
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PostPosted: 01:04 - 08 Oct 2010    Post subject: Reply with quote

Milk bottle!?!?

Everybody knows you use old inner tube! Laughing
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TUG
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PostPosted: 01:46 - 08 Oct 2010    Post subject: Reply with quote

C_dug is right, innertube, also clunking isnt a massive deal, adjust your clutch cable, theres 2 adjusters, one on the engine one on the handle bar normally.
Failing that its normal, think about how fast those gears turn and you have to mash them into each other to engage them.
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DrDonnyBrago
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PostPosted: 07:46 - 08 Oct 2010    Post subject: Reply with quote

c_dug wrote:
Milk bottle!?!?

Everybody knows you use old inner tube! Laughing


Indeed, but I don't own a bicycle Thumbs Up .
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TUG
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PostPosted: 14:41 - 08 Oct 2010    Post subject: Reply with quote

You don't need to own a bicylce, just an innertube... Laughing
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