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Scorpia's gearbox: "...nah"

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scorpia4
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Joined: 03 Aug 2014
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PostPosted: 20:34 - 26 Jan 2015    Post subject: Scorpia's gearbox: "...nah" Reply with quote
I was riding today and practising my leaning skills on corners. Then I took it into town to the pressure wash and gave it a good scrub before riding home. So I turn off into my friends road where I keep my bike as he's got a large garage. I downshift to first and... Nothing happened. It was all rev and no go. I free wheeled to his and tried again. I let the clutch out slowly while applying throttle and a most alarming sound came from deep in my little bikes belly. I quickly shifted to neutral and walked it into the garage. Anyways I heard parts that should be attached to things rattling around in the gearbox. I had problems previously with the bike slipping from second into neutral. And its gearbox oil was changed in October. I checked the level last week and it was fine. A new gearbox assembly is 40 monies online so not so bad.
The bike has 21k on the clock but its still a bit gay that I've only had it since October and it's already suffered a catastrophic failure. The top end seems to be fine however, although there's a rattle from the cam chain. I'm just lucky it happened a few hundred feet from his house rather than miles and miles away Laughing
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wristjob
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PostPosted: 21:05 - 26 Jan 2015    Post subject: Reply with quote
what bike?
have you got any oil in it?
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pits
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PostPosted: 21:11 - 26 Jan 2015    Post subject: Reply with quote
Cool story bro. Thumbs Up
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scorpia4
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Joined: 03 Aug 2014
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PostPosted: 21:15 - 26 Jan 2015    Post subject: Reply with quote
wristjob wrote:
what bike?
have you got any oil in it?

Not checked yet. Its on my to-do list for tomorrow. 2004 cbr 125
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scorpia4
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PostPosted: 21:19 - 26 Jan 2015    Post subject: Reply with quote
pits wrote:
Cool story bro. Thumbs Up

Thank you so much. It means a lot coming from you Dance!

MC wrote:
CBR125 iirc? Bikes upset over the spills


Maybe but it was slipping right after I got it, before I fell off numerous times.
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Rogerborg
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Joined: 26 Oct 2010
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PostPosted: 21:54 - 26 Jan 2015    Post subject: Re: Scorpia's gearbox: "...nah" Reply with quote
scorpia4 wrote:
its gearbox oil was changed in October.

Its gearbox oil, you say? Thinking

While it's apart, take the opportunity to clean the internal oil strainer.
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Last edited by Rogerborg on 08:41 - 27 Jan 2015; edited 1 time in total
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scorpia4
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Joined: 03 Aug 2014
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PostPosted: 22:36 - 26 Jan 2015    Post subject: Reply with quote
[quote="MC"]
scorpia4 wrote:

Slipping or sometimes getting neutral on downshifts?

Slipping into neutral during upshift from first. It was slipping down randomly recently as well.
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trevor saxe-coburg-gotha
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PostPosted: 06:31 - 27 Jan 2015    Post subject: Re: Scorpia's gearbox: "...nah" Reply with quote
Rogerborg wrote:
scorpia4 wrote:
its gearbox oil was changed in October.

Its gearbox oil, you say? Thinking


Pre-unit cbr innit m8.
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Jim Mc
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Joined: 28 Dec 2010
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PostPosted: 07:20 - 27 Jan 2015    Post subject: Reply with quote
Practicing cornering in the middle of winter?
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Rogerborg
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PostPosted: 08:47 - 27 Jan 2015    Post subject: Re: Scorpia's gearbox: "...nah" Reply with quote
trevor saxe-coburg-gotha wrote:
Rogerborg wrote:
Its gearbox oil, you say? Thinking

Pre-unit cbr innit m8.

Ah, I wonder what he's using in the primary drive casing. Some people swear by ATF.
____________________
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Iain.
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PostPosted: 09:35 - 27 Jan 2015    Post subject: Re: Scorpia's gearbox: "...nah" Reply with quote
scorpia4 wrote:
A new gearbox assembly is 40 monies online so not so bad.


I highly doubt that since replacing the thrust washers alone on my CR125 gearbox cost more than that. Wink

Infact, that had broken two cogs & I recall pricing them up at £80 a piece at trade monies.
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scorpia4
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Joined: 03 Aug 2014
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PostPosted: 15:52 - 27 Jan 2015    Post subject: Re: Scorpia's gearbox: "...nah" Reply with quote
Iain. wrote:
scorpia4 wrote:
A new gearbox assembly is 40 monies online so not so bad.


I highly doubt that since replacing the thrust washers alone on my CR125 gearbox cost more than that. Wink

Infact, that had broken two cogs & I recall pricing them up at £80 a piece at trade monies.

https://m.ebay.co.uk/itm/261489453051?nav=SEARCH
Clicky Wink
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Aff
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PostPosted: 15:56 - 27 Jan 2015    Post subject: Re: Scorpia's gearbox: "...nah" Reply with quote
scorpia4 wrote:

https://m.ebay.co.uk/itm/261489453051?nav=SEARCH
Clicky Wink


That isn't new, that is from a used bike with unknown mileage.
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scorpia4
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Joined: 03 Aug 2014
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PostPosted: 16:05 - 27 Jan 2015    Post subject: Re: Scorpia's gearbox: "...nah" Reply with quote
Aff wrote:
scorpia4 wrote:

https://m.ebay.co.uk/itm/261489453051?nav=SEARCH
Clicky Wink


That isn't new, that is from a used bike with unknown mileage.

I'm aware of that. But my bike isn't new either and has 21k on the clock so its unlikely to be in worse condition than mine is. Its also advertised as intact and the company selling it seems to have a reasonable return policy if its flawed. Also I'm a youth so I cannot afford a brand new gearbox assembly from Honda Smile

And I should clarify when I said new I meant new to me not as in its a new part. My bad Very Happy
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stinkwheel
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PostPosted: 16:23 - 27 Jan 2015    Post subject: Reply with quote
In B4 front sprocket come off.

Spontaneous, catastrophic gearbox failures are very rare. Clutch failures less so. Chain/sprocket failure is common. Any of the three could cause a total loss of forward drive.

So, before you go ordering a gearbox, I'd get that front sprocket cover whipped off and have a look to make sure it's a) Still on the splines and b) Has teeth on it.
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scorpia4
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Joined: 03 Aug 2014
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PostPosted: 18:00 - 27 Jan 2015    Post subject: Reply with quote
stinkwheel wrote:
In B4 front sprocket come off.

Spontaneous, catastrophic gearbox failures are very rare. Clutch failures less so. Chain/sprocket failure is common. Any of the three could cause a total loss of forward drive.

So, before you go ordering a gearbox, I'd get that front sprocket cover whipped off and have a look to make sure it's a) Still on the splines and b) Has teeth on it.


Thank you! That's really useful advice, I'll take a look. But I am doubtful its that because I replaced the sprockets and chain in October. But I'll certainly take a look thanks Very Happy
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sickpup
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Joined: 21 Apr 2004
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PostPosted: 01:41 - 28 Jan 2015    Post subject: Reply with quote
Seen this on a CBR125 years ago, Honda were about to replace the gearbox under warranty. The foot rest hanger was loose.
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Rogerborg
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Joined: 26 Oct 2010
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PostPosted: 09:02 - 28 Jan 2015    Post subject: Reply with quote
scorpia4 wrote:
stinkwheel wrote:
In B4 front sprocket come off.

I am doubtful its that because I replaced the sprockets and chain in October.

I'm less doubtful of that.

Always check the easy stuff first.
____________________
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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scorpia4
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PostPosted: 03:02 - 29 Jan 2015    Post subject: Reply with quote
Rogerborg wrote:

I am doubtful its that because I replaced the sprockets and chain in October.

I'm less doubtful of that.

Always check the easy stuff first.[/quote]

My dad and I did it together. He used to have bikes back in the 80s Wink I'd ask for his help with this but he lives up near banff.
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