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Thread: CG125 head work

  1. #1
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    Cool CG125 head work

    Finally decided to go for headwork.
    Reasons for getting work done

    1) Bike doing missing upon release of throttle
    2) A ton of carbon deposits in exhaust (my hand got covered in black carbon when mechanic revved it a bit)
    3) Smoke both on high and low RPM
    4) Small deposit of oil spotted on spark plug (it's seeping in to combustion chamber)

    Bought all the stuff myself on whole sale rate mostly, details of parts bought with pics are as follows
    All parts bough are genuine

    Cylinder:

    CG125 head work -1566815CG125 head work -1566816CG125 head work -1566817CG125 head work -1566818

    Piston with std rings

    CG125 head work -1566813CG125 head work -1566814

    Valves (High quality Japanese) + Exhaust washel

    CG125 head work -1566819

    Push Rods

    CG125 head work -1566820CG125 head work -1566821

    Cylinder Base Gasket

    CG125 head work -1566822


    Valve Stem Seal

    CG125 head work -1566823CG125 head work -1566824

    Cylinder head gasket

    CG125 head work -1566825CG125 head work -1566826

    Parts Bill

    CG125 head work -1566828



    Will get the work done on Saturday, i have got a question does engine need to be dismounted from frame or the entire work can be done while is it fitted ?

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    abobobilly @r1 @vickytulla

    If you ride like there's no tomorrow, there won't be.

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    Nope, no engine dismount is needed for such a work.
    Riders on the storm ... literally.

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    When you get the work done, don't forget to notice the quality difference between the new cylinder, and the older one. You will be deeply surprised.
    Riders on the storm ... literally.

  4. #4
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    NO! You don't have to demount the engine for entire work.

    I was facing same misfire and low stroke and power loss issue with my bike since last 3-4 months, went to mechanic last month for routine checkup and came to know the big valve is leaked. So got new valves, rings and piston and now bike is going smooth with crispy cracking sound. Mechanic asked me to complete 1000kms and come back for further tuning, but so far just 18kms done.

    Total charges for all work:

    Rings+Piston - Rs. 840/
    Valves: Rs. 560/
    Valve Seal: Rs. 120/
    Clutch Plates: Rs. 480/
    Kit: Rs. 270/
    AHL Oil: Rs. 370/
    Cylinder Bore: Rs. 150/
    Valves Polish: Rs. 250/
    Mechanic Charges: Rs. 1,200/
    Total: Rs. 4,240/

    Extras:
    New Speedometer: Rs. 1,200/
    New Grips: Rs. 800/
    Dream is not that which you see while sleeping it is something that does not let you sleep.

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    Quote Originally Posted by abobobilly View Post
    When you get the work done, don't forget to notice the quality difference between the new cylinder, and the older one. You will be deeply surprised.
    "MODERN" engine have aluminum cylinder's but as aluminium is soft metal manufacturer add iron bore in cylinder (which ensure less wear and tear) cylinder being lighter than older one means that either AHL is forging new cylinder head (near to impossible or too good to be true + there is no advantage of forging a head cylinder) or they have reduce the quality of iron bore

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    Quote Originally Posted by saboor73 View Post
    "MODERN" engine have aluminum cylinder's but as aluminium is soft metal manufacturer add iron bore in cylinder (which ensure less wear and tear) cylinder being lighter than older one means that either AHL is forging new cylinder head (near to impossible or too good to be true + there is no advantage of forging a head cylinder) or they have reduce the quality of iron bore
    Lighter cylinder means less overall weight, that's an addition of 2-3bhp right there. No ???

    On a serious note the cylinder seems to be heavy enough,will have to check the weight difference with the old when it comes out, if there is any.
    If you ride like there's no tomorrow, there won't be.

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    Quote Originally Posted by Chaudhary007 View Post
    Lighter cylinder means less overall weight, that's an addition of 2-3bhp right there. No ???

    On a serious note the cylinder seems to be heavy enough,will have to check the weight difference with the old when it comes out, if there is any.
    LOLz now cg fan will be like "wazan kam hai bike udam bagegi"

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    Nice parts selection mostly orignal...dear i have seen a thread from a lahori guy he had a very nice looking push rod then AHL one..he said that those rods are japeneees..they were looking great finishing and weight was cool as compare to AHL ones. i tried to find those rods here in RWP but could't find. please tell me the model of your bike and the total running before this head work due.

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    Quote Originally Posted by awaiz43 View Post
    dear i have seen a thread from a lahori guy he had a very nice looking push rod then AHL one..he said that those rods are japeneees..they were looking great finishing and weight was cool as compare to AHL ones. i tried to find those rods here in RWP but could't find.
    That's @abobobilly you are talking about he had Japanese installed but now recently he had comprehensive work done and installed genuine AHL ones.
    Japanese ones are available at Muhammadi Autos (Commitee chowk) for Rs900. Just tell them you need Japanese push rods not the AHL ones


    Quote Originally Posted by awaiz43 View Post
    please tell me the model of your bike and the total running before this head work due.
    2011 approx 35k kms. Getting opened first time
    If you ride like there's no tomorrow, there won't be.

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    Quote Originally Posted by Chaudhary007 View Post
    2011 approx 35k kms. Getting opened first time
    the engine gave up at 35k km only isn't that too early??

  11. #11
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    Quote Originally Posted by saboor73 View Post
    the engine gave up at 35k km only isn't that too early??
    I don't think so it's about this time that most of these "HONDA" engines start exhibiting this oil reduction problem whether it be 70 or 125, some people tend to ignore it until major fault arises, other's just get the bore done and ring pistons replaced and some like myself get this comprehensive work done.

    Also my daily route consisits of 5 lane wide expressway where maintaining a low speed is not an option, not to mention riding at constant speed. Therefore although my clutch plates are in pristine condition due to lack of riding in congested places and traffic, head needs work due to constant riding at high speed.
    If you ride like there's no tomorrow, there won't be.

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    Quote Originally Posted by Chaudhary007 View Post
    I don't think so it's about this time that most of these "HONDA" engines start exhibiting this oil reduction problem whether it be 70 or 125, some people tend to ignore it until major fault arises, other's just get the bore done and ring pistons replaced and some like myself get this comprehensive work done.

    Also my daily route consisits of 5 lane wide expressway where maintaining a low speed is not an option, not to mention riding at constant speed. Therefore although my clutch plates are in pristine condition due to lack of riding in congested places and traffic, head needs work due to constant riding at high speed.
    its true i have 2011 model CG125 last time i went to Islamabad for oil change from LQ dealer the oil was bit short not too much but oil came out of my bike was bit low in quantity. previously i was using Caltex Haovline but not satisfied with that oil..this was the 2nd time i used liqui moli for my bike..i will see up to next oil change if oil reduce again i will go for head work. now a days i am checking hard on oil level.so far its going cool

  13. #13
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    Had head work done today, it's too early to say anything but a few observations

    1) Piston was screwed and had an inch of carbon on top of it, so replacement was justified
    2) Silencer also had carbon in it and was comprehensively cleaned using petrol and compressed air.
    3) The original crackling sound of CG is back
    4) Mechanic suggested 800km of running and oil change and tappet setting at 500kms
    5) Push rods were next in line to cause trouble, good thing i had bought them so had them replaced.
    6) Cam follower, cam shaft and cam gear are still in good condition and can last for quite some time.

    Rest will try to post pic i have all the stuff which came out. Mixture is rich at the moment so cant judge economy.
    Almost 3 litres of petrol was used......yes 3 litres but i was satisfied that at least he as cleaning each and every part thoroughly.
    All genuine parts were used so hopefully there should be no trouble.

    Labour= 600
    Oil = 400
    Total = 1k
    If you ride like there's no tomorrow, there won't be.

  14. #14
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    3 liters of petrol for cleaning just that?

    I barely used 1L. Barely.

    Mechanic kuch ziyada he khula hath rakhnay wala ho ga.
    Riders on the storm ... literally.

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    Quote Originally Posted by abobobilly View Post
    3 liters of petrol for cleaning just that?

    I barely used 1L. Barely.

    Mechanic kuch ziyada he khula hath rakhnay wala ho ga.
    It's dealership workshop they have this compressed air type nozzel hanging above each terminal

    What they do is they attach a plastic pipe from the fuel cork and by holding both the pressure nozzle and pipe together spray the petrol. The pressure of the air is too much, so for cleaning it's excellent.
    Knsa roz roz head khulwana hta ha aur abhi hai bi Rs74/L
    If you ride like there's no tomorrow, there won't be.

  16. #16
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    So break in period completed?

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    [QUOTE=Chaudhary007;4772441]Had head work done today, it's too early to say anything but a few observations

    1) Piston was screwed and had an inch of carbon on top of it, so replacement was justified
    2) Silencer also had carbon in it and was comprehensively cleaned using petrol and compressed air.
    3) The original crackling sound of CG is back
    4) Mechanic suggested 800km of running and oil change and tappet setting at 500kms
    5) Push rods were next in line to cause trouble, good thing i had bought them so had them replaced.
    6) Cam follower, cam shaft and cam gear are still in good condition and can last for quite some time.

    Rest will try to post pic i have all the stuff which came out. Mixture is rich at the moment so cant judge economy.
    Almost 3 litres of petrol was used......yes 3 litres but i was satisfied that at least he as cleaning each and every part thoroughly.
    All genuine parts were used so hopefully there should be no trouble.

    Labour= 600
    Oil = 400
    Total = 1k[/QU


    Please recommend mechanic


    Sent from my iPhone using PW Forums

  18. #18
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    [QUOTE=jawad_1;4919515]
    Quote Originally Posted by Chaudhary007 View Post
    Had head work done today, it's too early to say anything but a few observations

    1) Piston was screwed and had an inch of carbon on top of it, so replacement was justified
    2) Silencer also had carbon in it and was comprehensively cleaned using petrol and compressed air.
    3) The original crackling sound of CG is back
    4) Mechanic suggested 800km of running and oil change and tappet setting at 500kms
    5) Push rods were next in line to cause trouble, good thing i had bought them so had them replaced.
    6) Cam follower, cam shaft and cam gear are still in good condition and can last for quite some time.

    Rest will try to post pic i have all the stuff which came out. Mixture is rich at the moment so cant judge economy.
    Almost 3 litres of petrol was used......yes 3 litres but i was satisfied that at least he as cleaning each and every part thoroughly.
    All genuine parts were used so hopefully there should be no trouble.

    Labour= 600
    Oil = 400
    Total = 1k[/QU


    Please recommend mechanic


    Sent from my iPhone using PW Forums
    Anmol Honda Center, Adyala Rd, Rawalpindi

    https://www.google.com/maps/place/Ho...43f8d94601c3a4
    If you ride like there's no tomorrow, there won't be.

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