Question about 1985 Yamaha FJ 1100

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I have a problem with my FJ1100... When I start driving in first gear, it sounds like the chain is jumping on the sprocket, but it is not the drive chain. This chain have the right tension. The bike is also jumping foreward. The same happens when I give full throttle in higher gear. Do you have any idea what the problem might be?

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Check the alignment of your rear wheel first and you may found that its not right and the chain is trying to jump the sprockets .

Posted on Sep 27, 2009

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1 Answer

How to adjust chain?


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as you can see your question is too open to get an answer

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The chain feels and sounds like it's jumping gears or slipping on the rear sprockets. It does it in all gears. It is a diamondback wildwood large 20"


The rear derailleur needs adjusting, once to establish limits (so it can't go past high gear or low gear). Everything else is up to you fine-adjusting the shifter to make the bike run quietly. If you're careless about your gear changes, you'll get MOSTLY into one gear but not quite perfectly, so the bike is always trying to start shifting into another gear - that's the sound you hear, the sensation you feel. Fine-tune your shifter positions each time you shift - you'll find a "sweet spot" where the bike runs almost perfectly silently.

No, they can't readily do that at the factory, not with chain drives. There are just too many things that can affect gear changes, and things are in a slightly different position every time you remove & replace the rear wheel, or even loosen & retighten it. Unless you're ready to spend vast dollars on a foolproof shifter system, shifting cleanly is going to be your job and your job alone. It's one measure of your bike riding skill... and the better you get at that skill, the better you feel about it.

...and your bike will like you for it.

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1 Answer

Grinding noise when accelerating


HI If your bike is chain drive, look at the chain tension, the chain could be hitting the gear box case. If you primary sprocket is worn the the chain could be jumping teeth If you have a shaft drive then inspect the universal joints and the differential oil level

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Sounds like either the chain is loose (adjust tension by moving rear wheel/axle further to the rear), rear chain sprocket is worn, front (transmission end) drive sprocket is worn, or rear wheel is severely out of alignment with the bike.

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That knocking noise could be that the teeth on your main drive are worn out and chain is jumping them on acceleration.Pull th primary cover and check the drive gear for chain on motor sprocket.Replace it if worn to that point.

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Hi there I own a Yamaha 1000 thunderace 1998.When I pull away there is a chain sound that desturbs the clean sound the enjin makes when driving.The bike does not miss fire and changes gears smoothly.when...


By chain sound do you mean a metalic rattle when you ride off?
I will assume that is not making that sound at idle. It could be that your cam chain has stretched and needs to either be replaced or tensioned.

If it is a pinking sound, sort of like someone tapping on a tin can with a coin. Then that is most likely preignition which isn't good for your engine. Why octane/RON fuel do you use?

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While riding the transmission shifts uncommanded and clicking noi


Assuming the drive chain and sprockets are in good condition.(check these first)
This sounds like and internal gearbox problem, a bearing has collapsed or a tooth has broken of a gear.
Riding it like this will cause more damage. The gear box will likely need to be stripped

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1 Answer

Sounds like chain jumping sprocket on right side.


so when you put it in gear it doesnt move with clutch disengaged???

Nov 02, 2009 | 2003 Yamaha YZ 250

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