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Maintenance & Repair => Mechanical => Topic started by: Dom1 on February 21, 2014, 09:08:05 AM

Title: It runs, just not well.
Post by: Dom1 on February 21, 2014, 09:08:05 AM

Got my son's shitbox CBR125R in the garage at the moment.

It has been stood for a while so I have had it on the trickle charger and it starts and runs after a while to warm up, but its not right.

My current plan is to empty the fuel tank, refill it with fresh fuel and some injector cleaner of some description.

My concern is that it may be a bigger problem than old fuel cos I seem to remember him saying it wasn't running right before he laid it up.

So first, any recommendations for injector cleaner?

Second, any other ideas for the reluctance to start and generally not revving properly? I am thinking maybe head gasket, but I want to rule out the obvious first.
Title: Re: It runs, just not well.
Post by: Green_Ninja on February 21, 2014, 09:17:42 AM
Fresh fuel, clean/replace fuel filter, new plug at least that's where I'd start, you sure it's injected not carbed?
Title: Re: It runs, just not well.
Post by: Dom1 on February 21, 2014, 09:23:03 AM
Well bugger me with a fishfork Wikipedia says the 2004 CBR125R is carbed.

Shows how much time I have spent looking at it i.e. not much.

It had a new plug pretty recently so I am starting with the fuel.
Title: Re: It runs, just not well.
Post by: ash on February 21, 2014, 09:25:48 AM
How long has it been stood ?
Title: Re: It runs, just not well.
Post by: Dom1 on February 21, 2014, 09:27:54 AM
Since November I think.
Title: Re: It runs, just not well.
Post by: Tiiimmmaaayyyy on February 21, 2014, 09:32:16 AM
The fuel should be ok, I've left fuel longer than that with no problems. Give it a good thrash and see if that sorts it out.

Valve clearances?
Title: Re: It runs, just not well.
Post by: ash on February 21, 2014, 09:33:41 AM
Quote from: Tiiimmmaaayyyy on February 21, 2014, 09:32:16 AM
The fuel should be ok, I've left fuel longer than that with no problems. Give it a good thrash and see if that sorts it out.

Valve clearances?

+1
Title: Re: It runs, just not well.
Post by: Dom1 on February 21, 2014, 09:46:50 AM
Think I may need to purchase a Haynes manual.
Title: Re: It runs, just not well.
Post by: Nat on February 21, 2014, 10:08:45 AM
This one should help:

(http://www.satellite-evolution.com/group/site/wp-content/uploads/2012/07/014.jpg)
Title: Re: It runs, just not well.
Post by: the invisible dog on February 21, 2014, 01:51:08 PM
Quote from: Nat on February 21, 2014, 10:08:45 AM
This one should help:

(http://www.satellite-evolution.com/group/site/wp-content/uploads/2012/07/014.jpg)

Is that the carb'd model?  :rolleyes:
Title: Re: It runs, just not well.
Post by: greenmeeny on February 21, 2014, 02:32:35 PM
Quote from: Nat on February 21, 2014, 10:08:45 AM
This one should help:

(http://www.satellite-evolution.com/group/site/wp-content/uploads/2012/07/014.jpg)
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Oooooo......always wanted one of those for a winter hack.