Date: 29-03-24  Time: 09:45 am

Author Topic: Knocking  (Read 2902 times)

Dead Eye

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Knocking
« on: 13 October 2011, 10:02:37 am »
Hi there all - im very new to the world of motorcycling so forgive dumb questions ;)

Ive had my Fazer for about 2-3 weeks now (1st bike ever, passed my test about a week before I got the bike) and ive noticed a sort of knocking on the bike - it happens when pulling away slowly in 1st/2nd then when cruising in the other gears around 30-45mph. I can mostly feel it when cruising, as opposed to hearing it, on the left side foot peg (gear / chain side)

It seems to go away if I pull in the clutch or back off on the power and assume that I just dont notice it at higher speeds due to wind noise and that the chain/wheel is actually moving faster (kinda obvious :P)

I did check the chain tension and it seemed a little slack so tightened it (all based on the manual) but the problem still exists (if it is in fact a problem). It seems out of place but I dont know if this is in fact normal operation due to my limited experience.

I did notice a topic on here from someone else who had a similar problem and which ended up being fixed by replacing the chain and sprocket but im uncertain if this the exact same fault or if it could be something else. Plus any advice on mechanics in the Bristol area would be handy :)

Thanks for any replies

griff86

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Re: Knocking
« Reply #1 on: 13 October 2011, 01:39:03 pm »
Alrite Dead Eye


I'd go with the chain and sprockets need changing.



The feeling you are having through the left foot peg was the same as mine, new chain and sprockets sorted it.


kebab19

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Re: Knocking
« Reply #2 on: 13 October 2011, 02:07:30 pm »
Take off the engine's chain cover & check your front sprocket tab washer thingy is still in place.

Dead Eye

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Re: Knocking
« Reply #3 on: 13 October 2011, 06:06:12 pm »
Thanks for the information, just need to get round to actually doing it now. I like doing my own mechanics but this could be interesting - how much of a complex job is it / many specialist tools required?

Captain Haddock

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Re: Knocking
« Reply #4 on: 13 October 2011, 06:59:37 pm »
To check the front sprocket you just need a 10mm socket for the gear linkage (1 bolt) and a 5mm allen key for the cover (5 bolts), and a box for all the spare parts left over afterwards  :lol
it's very simple.
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Dead Eye

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Re: Knocking
« Reply #5 on: 13 October 2011, 07:03:10 pm »
I'll more than likely check the front sprocket tonight though im not entirely certain what im checking for (again, newbie at bike mechanics atm ;))

As far as spare parts are concerned I always seem to have some left over or some missing :P Already today ive lost a bolt for my car which has resulted in the complete inability to open the boot anymore :(

Bracechenko

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Re: Knocking
« Reply #6 on: 13 October 2011, 07:51:44 pm »
Alrite Dead Eye


I'd go with the chain and sprockets need changing.



The feeling you are having through the left foot peg was the same as mine, new chain and sprockets sorted it.

Ditto....mine does it right now as the C&S are on 32k. As long as the knocking is relative to the bike speed (ie, you speed up, the knocking frequency speeds up) then i'd replace the chain and sprockets. Usually caused by a tight spot in the chain.

Dead Eye

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Re: Knocking
« Reply #7 on: 15 October 2011, 11:45:35 am »
I ended up looking the service history I have for the bike and it looks like it hasn't had a new chain and sprockets since 2006 so I figured that was a good enough reason to have them replaced - booked in on monday with Morpheus in Bristol :)

Edit: Just as a final update, the new chain and sprockets have solved the knocking and the bike feels a lot nicer though I did get caught in a rain storm :p
« Last Edit: 17 October 2011, 09:35:43 pm by Dead Eye »