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Discussion Starter · #1 ·
hi guys, dunno if you can help or not.

i recently bought the wife a cg125 as shes doing direct access A2, the problem we have is a lack of speed.

the bike will not hit 60 unless i leave it in 4th gear... i am told they should get to 65 even 70 (with a back wind) but this seems to get no where near.

where shall i start?

plug?
air filter (where is it?)
oil change? (which oil shall i use?)

will these help??

also would it be an idea to clean the carb, if so what do you reckon, something i shove in the tank or into the carb itself, what shall i use.

i await replies before racing off to the shop.
 

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Hi There

The CG is a great commuter bike.

Is it new? If so the running in process should be done, also the engine will be stiff so to say. Once it's run in it will loosen up and top speeds will come.

If it's second hand I suggest a good service, change the oil, spark plug, air filter. Also consider getting the carb cleaned and set properly.

Check tyre pressure as well.

Another thing to consider is the petrol quality.
 

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125cc's saddest c*nt
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It?s really difficult to answer question like this over the internet. To know if a bike is running badly you need to see it run. If there is something wrong then there are too many possibilities of what it could be to give any useful advice.

I would suggest taking it to a garage/knowledgeable friend and asking them to give the bike a quick check over. A good mechanic will be able to tell if there is something obviously wrong quite quickly. They fix bikes all day 5/6 days a week and are generally very good at spotting problems.

If you don?t want to take it to a garage then get a Haynes manual and follow the instructions for a service, if everything is 10% out then that will make a big difference to the performance.
 

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Discussion Starter · #5 ·
cheers chaps

the bike wasnt run for 3 years, and is a 2001.

i think it really needs a service and clean up..

so as mentioned before..

what type oil, i know i dont need fully synth but what shall i use and how much do i need.
i will change spark plug
what carb cleaner.. because i have a funny feeling it will be 'gunky'

i do appreciate you input, thanks
 

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125cc's saddest c*nt
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Oil plug type will be in a Haynes Manuel, I sound like an advert but they are excellent value for money. If the bike was sat for 3 years I would say it would definitely benefit from a service.

Cleaning the carb would seem like a good idea. I am not a fan of ?in the petrol? cleaners, they just seem a bit pansyish. A good spray of carb cleaner is my favourite. Don?t forget to read the instructions some say you should spray with the engine running.
 

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If it's been standing for that long I suggest changing the fuel pipe as well. The flow will be better into the carb.

Drain the oil and put in some 10w/40. Get the same type spark plug, make sure the gap is right. Change the fuel filter if there is one.

A good spray of carb cleaner should do wonders for the carb.

Make sure the battery is charged up.
 

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I used a CG125 to take my test and on the training we went down the A2 and basically you will have to be redlining it in 4th to get to 60 as 5th is pretty useless I managed an indicated 63 in 5th I think its more of an overdrive. This was on a 55 plate bike which had been run in. Even the instuctor said he rode one around and only got to about 65-67 with the wind behind him. So I'd say what your getting from yours is about right and wouldn't worry about it.
 

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i think it really needs a service and clean up..

so as mentioned before..

what type oil, i know i dont need fully synth but what shall i use and how much do i need.
i will change spark plug
what carb cleaner.. because i have a funny feeling it will be 'gunky'

i do appreciate you input, thanks
See the owners' manual for that info!
 
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