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Honda CBF125 gearbox clicking

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Tommo237
Two Stroke Sniffer



Joined: 29 Jun 2013
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PostPosted: 17:06 - 01 Oct 2013    Post subject: Honda CBF125 gearbox clicking Reply with quote
Hi all, I've owned my standard CBF 125 for about a month and it's developed a mysterious clicking noise.
As I'm gently decreasing speed usually just under engine braking, I get a rhythmic clicking in time to engine speed, ie the faster speed, quicker clicks. It's loudest when I drop down into 2nd gear and let the clutch out. It's booked in at honda on Friday but I was hoping someone could enlighten me before it goes in.
It doesn't make the noise when accelerating or when just letting off, ususually I have to change down for it to start.
Thanks for any help.
____________________
1985 Beta 125s 2005 TGB R50x
2005 Derbi GPR50 2004 Pioneer Nevada 2010 Honda CBF125
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Dave M
Scooby Slapper



Joined: 03 May 2013
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PostPosted: 09:55 - 02 Oct 2013    Post subject: Reply with quote
What year is it? I would of said valves?
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Tommo237
Two Stroke Sniffer



Joined: 29 Jun 2013
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PostPosted: 12:05 - 02 Oct 2013    Post subject: Reply with quote
It's a 2010
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1985 Beta 125s 2005 TGB R50x
2005 Derbi GPR50 2004 Pioneer Nevada 2010 Honda CBF125
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Rogerborg
nimbA



Joined: 26 Oct 2010
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PostPosted: 12:38 - 02 Oct 2013    Post subject: Re: Honda CBF125 gearbox clicking Reply with quote
Tommo237 wrote:
It's booked in at honda on Friday

In warranty? "They all do that. Now push off."

Out of warranty? "They all do that. £80 then push off."

What sort of clicking are we talking? A metallic ping, a whacking sound, or could it be an electrical arc? What sort of frequency?

Is it definitely related to engine speed rather than road speed? Because my first suspicion would be the chain or sprockets, particularly as it's happening under different load conditions.
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Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike
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Tommo237
Two Stroke Sniffer



Joined: 29 Jun 2013
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PostPosted: 16:25 - 02 Oct 2013    Post subject: Reply with quote
Probably get it under used bike sales 60 day warranty.

Imagine there's a tooth missing on one of the gears, definitely metallic. It's relative to road speed, should've noted that sorry. Feel it through the foot pegs, definitely gearbox area maybe sprocket
____________________
1985 Beta 125s 2005 TGB R50x
2005 Derbi GPR50 2004 Pioneer Nevada 2010 Honda CBF125
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Ariel Badger
Super Spammer



Joined: 02 Dec 2006
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PostPosted: 17:19 - 02 Oct 2013    Post subject: Reply with quote
It will be the chain, it always is.
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Bikers make great organ donors, get 115 on your licence today.
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Rogerborg
nimbA



Joined: 26 Oct 2010
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PostPosted: 17:50 - 02 Oct 2013    Post subject: Reply with quote
Ha, sure, if road speed, then chain or sprockets. Check the teeth, the tension, look for tight spots (turn the wheel and look for any links standing proud of the rear sprocket as they go around), and that it's running straight. God knows what's been done to it before you got it, the wheel could be well out of alignment.
____________________
Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike
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Tommo237
Two Stroke Sniffer



Joined: 29 Jun 2013
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PostPosted: 17:02 - 03 Oct 2013    Post subject: Reply with quote
Well it had just been serviced so I thought it would be fine. It wasn't.
Chain had at least 120mm play... Literally.
Turns out whoever adjusted it, left the right adjuster finger tight.
Just tightened it up and it's smooth. No noise.
Once again thanks all for the help. Much appreciated, happy biking.
____________________
1985 Beta 125s 2005 TGB R50x
2005 Derbi GPR50 2004 Pioneer Nevada 2010 Honda CBF125
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Old Thread Alert!

The last post was made 12 years, 138 days ago. Instead of replying here, would creating a new thread be more useful?
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