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Discussion Starter · #1 ·
I have always kept my bike in top shape oil changes every 2000miles service every 5000miles but at 18000 miles now it just seems to be loosing power! plug looks realy white and furry but looking at the plug which was last changed its a more richer healthier looking plug. I am running the CR9E instead of the CR8E manual says either one but the last time it was serviced a 8E was put back in! to be fair it has never been right since its last service so any body got any clues I have drained float bowl (which had bits of crud and a slight bubble of water in) and just running out of ideas!! also I run super unleaded any help appreciated.
 

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Discussion Starter · #3 ·
White furry plug
Sounds like it is running lean.

Try going back to the standard plug & normal unleaded(super unleaded in an untuned bike is just a waste of money), try that for a full tankfull, see how it is now running & then check the plug for colour.
Chris.
I have a standard plug in at the moment and when i compared it to the CR98 which is the higher heat range the 9 was loads darker and richer and was still using same superunlead! has any one got the standars carb setting any ware so i can check from scratch! thamks chris will try norm unleaded ta
 

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Why are you servicing it every 5000 miles? Honda recommend a service every 2500 miles!
 

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may be ur bike just needs a good internal clean, ie check all fuel lines, carb jets and valve clearences etc

i agree with whats been said be4, dont use super unleaded, normal is just fine and only use the cr9e plug for say motorway use.

if the plug is white then ur running lean, as said be4

depends on how u ride the bike

r the tyres properly pumped up...too low and it will slow u down?
 

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Id start with the camchain. That seriously can reduce the power of your bike.
Sorry but the cam chain will not reduce the power to your bike, if it is stretched you will know about it due to the noise, with the "not enough power to pull the skin off a rice pudding" power delivery of the CBR125r, you will have very little chance of stretching it to effect the performance of the bike.

As the bike is running lean it will effect the performance of the bike.

Check the following, fuel filter, carb diaphram & carb jets, best bet is to take it to a dealer & check the carb & blow the jets out.

Have you taken out the air filter, as that will make the bike run lean.

Chris.
 

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Sorry but the cam chain will not reduce the power to your bike, if it is stretched you will know about it due to the noise, with the "not enough power to pull the skin off a rice pudding" power delivery of the CBR125r, you will have very little chance of stretching it to effect the performance of the bike.

As the bike is running lean it will effect the performance of the bike.

Check the following, fuel filter, carb diaphram & carb jets, best bet is to take it to a dealer & check the carb & blow the jets out.

Have you taken out the air filter, as that will make the bike run lean.
Chris.
Clearly have no experience with the cbr then.
 

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clearly, im on 23.000 km. (cant be bothered to convert them) and my chain tension has started to have a mind of its own... im thinking about buying a new one as resetting it makes my bike run smooth for like ...500 km
Im not quite on that many.... in the region of 13000 miles and my cam chain is away to give up. Im looking forward to it going pop
as i cant be botherd to replace it. Karloss had the same problem with hes, dunno if he fixed it tho.
 

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Im not quite on that many.... in the region of 13000 miles and my cam chain is away to give up. Im looking forward to it going pop
as i cant be botherd to replace it. Karloss had the same problem with hes, dunno if he fixed it tho.
mine started the chingely changely since i put on my unlimited cdi and started revving it to the 13 000 range
(ooopsie) lol i love raping my bike, once i just opened full throttle with the clutch in and it when to what i would asume 14-15000 rpm!!! it was like hmmm imagine the clock on the wall showing 15:15 about there, wouldnt go any more. lol but i only did it once to see how high it would get, anyway after the cdi and loads of raping it started having the problem. hopefully with a new one it will work sweet like before. ill do it once i get the 160 cc malossi kit (i love that thing i gotta have it). OH i just converted your miles and your at 20.000 km's aproximately lol so you are as high as me
 

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abc - are they from a workshop manual?
 

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how much that set you back?how many pages is it?
 

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?40 from ebay. ?60 from dealers. I dont know how many pages there are as its divided into 21 sections with their own pages. I have the parts manual as well which not only covers the CBR125 but all of the Honda bikes sold in Europe and the USA.
 

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mine started the chingely changely since i put on my unlimited cdi and started revving it to the 13 000 range
(ooopsie) lol i love raping my bike, once i just opened full throttle with the clutch in and it when to what i would asume 14-15000 rpm!!! it was like hmmm imagine the clock on the wall showing 15:15 about there, wouldnt go any more. lol but i only did it once to see how high it would get, anyway after the cdi and loads of raping it started having the problem. hopefully with a new one it will work sweet like before. ill do it once i get the 160 cc malossi kit (i love that thing i gotta have it). OH i just converted your miles and your at 20.000 km's aproximately lol so you are as high as me
If i was you I would check that there has not been any valve to piston contact, as at those revs the you could have experienced a bit of valve bounce, this can leave very lightly bent valves, which would cause a loss of compression etc & power loss


Chris.
 
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