Knocking sound when shutting off throttle in gear
#11
09-09-2011, 01:37 PM
Senior Member
where do you feel the clunk at? and does it make a clunking sound or do you just feel it. I know when i release the throttle on my 95 cbr1kf i feel a little jolt on the front ends. I checked everything and just figured it was normal. I will be following this for sure and welcome to the cbr1kf club you will love the bike
#12
09-09-2011, 02:52 PM
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where do you feel the clunk at? and does it make a clunking sound or do you just feel it. I know when i release the throttle on my 95 cbr1kf i feel a little jolt on the front ends. I checked everything and just figured it was normal. I will be following this for sure and welcome to the cbr1kf club you will love the bike
Thanks a lot for the welcome and yes I'm loving the bike and the forum but so far the forum is performing a little better than the bike!!
Yes, 'clunk' is a good description of the sound/knock. I can be cruising at say 50mph varying the throttle openings slightly to maintain speed but as the drive stops on throttling off a little I'm feeling this clunk in the area of the engine sprocket. Open the throttle again and it snatches a little then it's fine under load. Close the throttle again and 'clunk' again.
Regards
Stuart
#13
09-09-2011, 06:33 PM
Senior Member & tensioner mod inventor ROTM WINNER FEB 2013
Stuart,
Welcome to the home of CBRs mate.
Southern woofter to hard northern bastard handshake?
The play in the front sprocket is perfectly normal and meant to be there.
The 5-10 mm play at the cush drive is not normal. A new cush drive set is as tight as a nuns chuff. Change the rubbers. Loads on ebay and not that expensive from Honda.
That should sort you out. Sounds like you've got your mother's hands so handling a spanner isn't a problem for you is it.
There's so much information on this site it puts the British library to shame. Use and abuse at will!
Welcome to the home of CBRs mate.
Southern woofter to hard northern bastard handshake?
The play in the front sprocket is perfectly normal and meant to be there.
The 5-10 mm play at the cush drive is not normal. A new cush drive set is as tight as a nuns chuff. Change the rubbers. Loads on ebay and not that expensive from Honda.
That should sort you out. Sounds like you've got your mother's hands so handling a spanner isn't a problem for you is it.
There's so much information on this site it puts the British library to shame. Use and abuse at will!
#14
09-09-2011, 07:15 PM
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Posts: n/a
I've just removed the back wheel and found that the sprocket turns about 5-10mm in the cush drive hub.
Maybe that's the problem?
Maybe that's the problem?
IMO - Not too sure if that would make a big clunk though ???? they are still rubber mounted even with a bit of free play in them ...
... we shall see hey ...
#15
09-09-2011, 08:17 PM
Could try these guys
Honda CBR 1000 FM/FN 91-92 Cush Drive Rubber - Set Parts at Wemoto - The UK's No.1 On-Line Motorcycle Parts Retailer
They're just down the road from me, nice bunch.
Honda CBR 1000 FM/FN 91-92 Cush Drive Rubber - Set Parts at Wemoto - The UK's No.1 On-Line Motorcycle Parts Retailer
They're just down the road from me, nice bunch.
#16
09-09-2011, 08:45 PM
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Hey Stuart , mate , another long shot that no one has mentioned ,but easy to check ,
have you checked the balancer (EDITED FOR Pete ) "shaft" adjustment for too much slack at all ????
They can get up quite a rattle or a clunk as you put it , when loose ...
have you checked the balancer (EDITED FOR Pete ) "shaft" adjustment for too much slack at all ????
They can get up quite a rattle or a clunk as you put it , when loose ...
Last edited by CBRclassic; 09-10-2011 at 04:24 AM.
#17
09-10-2011, 01:31 AM
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Knocking when throttling off in gear
More responses!!
Really grateful to all of you guys for the tips and welcomes, it's a rare experience in todays world!
I've checked out ebay for the rubbers - Durex Featherlight is all I can find - or am I looking for the wrong thing!!! lol.
Seriously though, yes, there are a number of listings for Cush Drive Rubbers, for information pricing is between £13.00 and £30.00 for used ones depending on the dreaded P&P. (my Dad always told me never to use a rubber after someone else has!) They're only around £35.00 new so I'll probably do that.
It's 07:25 and I'm off into the shed to see how she is this morning....
Really grateful to all of you guys for the tips and welcomes, it's a rare experience in todays world!
I've checked out ebay for the rubbers - Durex Featherlight is all I can find - or am I looking for the wrong thing!!! lol.
Seriously though, yes, there are a number of listings for Cush Drive Rubbers, for information pricing is between £13.00 and £30.00 for used ones depending on the dreaded P&P. (my Dad always told me never to use a rubber after someone else has!) They're only around £35.00 new so I'll probably do that.
It's 07:25 and I'm off into the shed to see how she is this morning....
#18
09-10-2011, 01:33 AM
Sounds like sprocket and chain - maybe time for new running gear ?
I didn't know the balancer shaft ran on a chain..................?
I learn new stuff every day.
Could it be loose engine mounting bolts ?
Cush drives could be the culprit but over all the years I've not had any trouble in that area.
Who knows, maybe I have and didn't realise it. Henry seems to be well up on the subject.
My bet would be a loose/stretched chain and possibly a shagged front sprocket.
And buy a new set of TROJANS - I believe they are "knock proof"
I didn't know the balancer shaft ran on a chain..................?
I learn new stuff every day.
Could it be loose engine mounting bolts ?
Cush drives could be the culprit but over all the years I've not had any trouble in that area.
Who knows, maybe I have and didn't realise it. Henry seems to be well up on the subject.
My bet would be a loose/stretched chain and possibly a shagged front sprocket.
And buy a new set of TROJANS - I believe they are "knock proof"
#19
09-10-2011, 02:51 AM
Senior Member
More responses!!
Really grateful to all of you guys for the tips and welcomes, it's a rare experience in todays world!
I've checked out ebay for the rubbers - Durex Featherlight is all I can find - or am I looking for the wrong thing!!! lol.
Seriously though, yes, there are a number of listings for Cush Drive Rubbers, for information pricing is between £13.00 and £30.00 for used ones depending on the dreaded P&P. (my Dad always told me never to use a rubber after someone else has!) They're only around £35.00 new so I'll probably do that.
It's 07:25 and I'm off into the shed to see how she is this morning....
Really grateful to all of you guys for the tips and welcomes, it's a rare experience in todays world!
I've checked out ebay for the rubbers - Durex Featherlight is all I can find - or am I looking for the wrong thing!!! lol.
Seriously though, yes, there are a number of listings for Cush Drive Rubbers, for information pricing is between £13.00 and £30.00 for used ones depending on the dreaded P&P. (my Dad always told me never to use a rubber after someone else has!) They're only around £35.00 new so I'll probably do that.
It's 07:25 and I'm off into the shed to see how she is this morning....
Nothing good is ever going to come from googling 'rubbers'. My money's on the cush drive too.
#20
09-10-2011, 03:48 AM
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but .....Ok , adjust the slack in the SHAFT setting on the dam thing... hahaha
Shoot me !! ... so I am fortunate enough or smart enough? because of not having had to rip my bloody engine to pieces for years !...
My bad !! sorry for the incorrect description of the balancer drive ....
and I have had a plenty of hard miles go under the bridge on big bike's like allot of the guys here and never had a cush drive rubber go clunk ....
..............
Could it be loose engine mounting bolts ?
................
Last edited by CBRclassic; 09-10-2011 at 04:34 AM.