Survey by Qualaroo
+ Reply to Thread
Page 1 of 2 12 LastLast
Results 1 to 20 of 22
Like Tree3Likes

Thread: Complete engine overhaul, increasing bore, stroke, new power components. Any guides?

  1. #1
    PakWheeler Follow
    mateen001's Avatar
    Join Date
    Jun 2014
    Location
    Gujranwala
    Age
    25
    Posts
    54
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default Complete engine overhaul, increasing bore, stroke, new power components. Any guides?

    Hi,

    I'm about to have an old CD-70 (1991) undergo a complete engine overhaul where the idea is to:

    -Increase the bore and stroke from the (khradiya wala) for increased engine displacement (aiming for 100 cc + )
    -Obviously adding new, larger pistons and whichever components are needed to accomodate the new displacement
    -Replace ALL old engine components with new and improved ones.
    - New, better carburator, clutchplates

    Make any additional changes which are required to make this old engine perform 100% with all the upgrades, tunings and components.

    ---------------------------------------------------------

    I know the mechanic will and should know most these things himself, however I strongly feel that it's best that having knowledge of exactly what needs to be done beforehand myself will be best. This way I can specifically communicate to the mechanic about what I want I and make sure that nothing is missed.


    So does anyone know if there's a guide on Pakwheels that covers every aspect that needs attention, or a list of components and things that needs to be done in order to bring a 72 cc Honda CD 1991 to perform well with a new displacement of 100 cc + ?

  2. #2
    Senior PakWheeler Follow
    hidalgo's Avatar
    Join Date
    Mar 2011
    Location
    Rawalpindi
    Age
    26
    Posts
    6,627
    Follows
    2
    Following
    0
    Mentioned
    148 Post(s)
    Tagged
    16 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    dear it can be done , change the crank to 78cm3 (brand new is av for 1.2k in rawalpindi) change the head cylinder to 11o cc and install 11o cc piston it will cost you around 2k from bilal gunj, install quingqi clutch box install cg 125 carb and install pod filter , i my self have increased the bore of my 7o and i m running cd1oo piston in it

  3. #3
    Senior PakWheeler Follow
    vickytulla's Avatar
    Join Date
    Oct 2009
    Posts
    8,421
    Follows
    38
    Following
    2
    Mentioned
    876 Post(s)
    Tagged
    31 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    these days 125 and 138cc head/Cylnder/Pistons are also in market price is around 13k for a set you can try that too...they produce enormous power and have a dedicated oil pump for each valve pair (its a 4valve engine) and work with saem 110cc Road Prince crank.
    https://www.pakwheels.com/forums/motorcycle-travel-diaries/277725-sober-riders-visit-khunjerab-adventurous-way-via-nori-pass

  4. #4
    Senior PakWheeler Follow
    JustFarooq's Avatar
    Join Date
    Apr 2006
    Location
    Faisalabad
    Age
    33
    Posts
    1,037
    Follows
    0
    Following
    0
    Mentioned
    29 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Quote Originally Posted by vickytulla View Post
    these days 125 and 138cc head/Cylnder/Pistons are also in market price is around 13k for a set you can try that too...they produce enormous power and have a dedicated oil pump for each valve pair (its a 4valve engine) and work with saem 110cc Road Prince crank.
    Vicky bhai whats the effect of valves in power of the engine in simple is a 4 valves engine gains more power than 2 valves?

    Allah o Akbar
    ALLAH U MMA SALLE ALAA MUHAMMADIN WA BAARIQ WASALLAM

  5. #5
    Senior PakWheeler Follow
    vickytulla's Avatar
    Join Date
    Oct 2009
    Posts
    8,421
    Follows
    38
    Following
    2
    Mentioned
    876 Post(s)
    Tagged
    31 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    in simplest most form = more valves more power ...


    details :
    Multi-valve - Wikipedia, the free encyclopedia

    Quote Originally Posted by JustFarooq View Post
    Vicky bhai whats the effect of valves in power of the engine in simple is a 4 valves engine gains more power than 2 valves?

    Allah o Akbar
    https://www.pakwheels.com/forums/motorcycle-travel-diaries/277725-sober-riders-visit-khunjerab-adventurous-way-via-nori-pass

  6. #6
    Senior PakWheeler Follow
    hidalgo's Avatar
    Join Date
    Mar 2011
    Location
    Rawalpindi
    Age
    26
    Posts
    6,627
    Follows
    2
    Following
    0
    Mentioned
    148 Post(s)
    Tagged
    16 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    vicky bhai cmplete 4 valve engine is available? Or just head and cylinder with piston, valves and stuff

  7. #7
    Senior PakWheeler Follow
    vickytulla's Avatar
    Join Date
    Oct 2009
    Posts
    8,421
    Follows
    38
    Following
    2
    Mentioned
    876 Post(s)
    Tagged
    31 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    20k from engine without CDI and rectifier but with carb...

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435019



    Complete engine overhaul increasing bore stroke new power components Any guides? -1435020




    Quote Originally Posted by hidalgo View Post
    vicky bhai cmplete 4 valve engine is available? Or just head and cylinder with piston, valves and stuff
    https://www.pakwheels.com/forums/motorcycle-travel-diaries/277725-sober-riders-visit-khunjerab-adventurous-way-via-nori-pass

  8. #8
    PakWheeler Follow
    IceCold's Avatar
    Join Date
    Aug 2006
    Location
    Lahore
    Age
    33
    Posts
    610
    Follows
    2
    Following
    0
    Mentioned
    20 Post(s)
    Tagged
    1 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Quote Originally Posted by vickytulla View Post
    these days 125 and 138cc head/Cylnder/Pistons are also in market price is around 13k for a set you can try that too...they produce enormous power and have a dedicated oil pump for each valve pair (its a 4valve engine) and work with saem 110cc Road Prince crank.
    So can this head be fitted on for example my jackpot without alternation?

  9. #9
    Senior PakWheeler Follow
    vickytulla's Avatar
    Join Date
    Oct 2009
    Posts
    8,421
    Follows
    38
    Following
    2
    Mentioned
    876 Post(s)
    Tagged
    31 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    yep but I will not recomend to riun a brand new nice bike...


    how ever :

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435062

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435063

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435064

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435066

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435067

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435068

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435069

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435070

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435071

    Ref:
    https://www.pakwheels.com/forums/att...ve-maintenance

    and Alterations threads of @FC



    Quote Originally Posted by IceCold View Post
    So can this head be fitted on for example my jackpot without alternation?
    https://www.pakwheels.com/forums/motorcycle-travel-diaries/277725-sober-riders-visit-khunjerab-adventurous-way-via-nori-pass

  10. #10
    PakWheeler Follow
    mateen001's Avatar
    Join Date
    Jun 2014
    Location
    Gujranwala
    Age
    25
    Posts
    54
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    [QUOTE=vickytulla;4423768]yep but I will not recomend to riun a brand new nice bike...



    how ever :



    Complete engine overhaul increasing bore stroke new power components Any guides? -1435068

    Lollywood should make a movie featuring Gullu Butt with this yellow bike - "sabb ganda hai parr dhanda hai yeh"

    Company - Ganda Hain - YouTube

    This is not right man, gari woh nehi rehti aggr engine badla jae...andr se jo marzi badl loh..but don't call it a Honda anymore :p

    Would anyone happen to know of professional bike modders in Gujranwala??? I don't think it's realistic that I first get a 3 year degree in engineering before I know every detail on what to change and how myself.

  11. #11
    PakWheeler Follow
    IceCold's Avatar
    Join Date
    Aug 2006
    Location
    Lahore
    Age
    33
    Posts
    610
    Follows
    2
    Following
    0
    Mentioned
    20 Post(s)
    Tagged
    1 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Quote Originally Posted by vickytulla View Post
    yep but I will not recomend to riun a brand new nice bike...


    how ever :

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435062

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435063

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435064

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435066

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435067

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435068

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435069

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435070

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435071

    Ref:
    https://www.pakwheels.com/forums/att...ve-maintenance

    and Alterations threads of @FC
    Is ko dekh ker dil main khail utta tha why not, app phela he wahan ponch ga or mana ker diya. Nahi itni jaldi to nahi keroon ga but now that i know kah this can be done, i might look into it in the future.

  12. #12
    PakWheeler Follow
    adil_dar's Avatar
    Join Date
    Nov 2006
    Location
    Gujranwala
    Age
    40
    Posts
    745
    Follows
    1
    Following
    0
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Guys

    My younger also had his 70 (2006 model redone) and he also wanted to do the same my only question was whether he was going to change crank shaft Complete engine overhaul increasing bore stroke new power components Any guides? -1435099


    As a rule these crank shafts are different according to the piston bore and the pressure that piston goes through, It has enough weight to hold and balance all above factors.

    Changing bore piston everything and leaving it can be a serious mistake, Better check with a good mechanic first.

    MAteen you have mentioned your city gujranwala if you live here i can guide you to a good mechanic.

    But my personal opinion is that do not go for bigger bore and piston with its stock crank shaft.

    BTW those who have changed bore and piston to a bigger size, and havnt changed the crank shaft have you ever noticed vibration in engine on higher RPMs?

    On second thoughts i have indicated to it in pic some mechanics call it weight.

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435108
    (i love pakistan)
    adil_dar@hotmail.com

  13. #13
    Senior PakWheeler Follow
    vickytulla's Avatar
    Join Date
    Oct 2009
    Posts
    8,421
    Follows
    38
    Following
    2
    Mentioned
    876 Post(s)
    Tagged
    31 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    48cc to 72cc crack/weight is same from 78cc to 107 crank is same from 109 to 124cc cranks are same. hope that helps.
    https://www.pakwheels.com/forums/motorcycle-travel-diaries/277725-sober-riders-visit-khunjerab-adventurous-way-via-nori-pass

  14. #14
    PakWheeler Follow
    mateen001's Avatar
    Join Date
    Jun 2014
    Location
    Gujranwala
    Age
    25
    Posts
    54
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Quote Originally Posted by adil_dar View Post
    Guys

    My younger also had his 70 (2006 model redone) and he also wanted to do the same my only question was whether he was going to change crank shaft Complete engine overhaul increasing bore stroke new power components Any guides? -1435099


    As a rule these crank shafts are different according to the piston bore and the pressure that piston goes through, It has enough weight to hold and balance all above factors.

    Changing bore piston everything and leaving it can be a serious mistake, Better check with a good mechanic first.

    MAteen you have mentioned your city gujranwala if you live here i can guide you to a good mechanic.

    But my personal opinion is that do not go for bigger bore and piston with its stock crank shaft.

    BTW those who have changed bore and piston to a bigger size, and havnt changed the crank shaft have you ever noticed vibration in engine on higher RPMs?

    On second thoughts i have indicated to it in pic some mechanics call it weight.

    Complete engine overhaul increasing bore stroke new power components Any guides? -1435108
    yehi to baat hai bhai, Just like doctors in Pak treat you like a cow or sheep and just tell you to eat this and **** off, the mechanic will just "fix it" and dismiss you.

    What I mean to say is that if a person wants to "customize" and overhaul their standard 72cc engine into a 105cc one which gives the same engine performance of a Junoon or pridor 100cc engine then there must be a proper method and list of things that needs to be done.

    It's definately not as simple as to increase bore and stroke, you need new components that will be compatible with the new engine volume, you need new carburator that accomodates the increased oxygen demand - thus if you want to be successful in converting a 72cc engine into a 100% performing 100cc+ engine you need to either be an engineer and know what you are doing or you need a guide or 3rd option - Know a mechanic who knows this "engine boosting" business like he knows eating and sleeping.

    Yes, I stay in Gujranwala whenever I come to Pak. My chacho bought me a 1991 model cd-70 and he's having work done on it from some friend mechanic.


    The purpose of this thread was the hope of finding some technical person who could lay out some list or brief guide on specifically what needs to be done to bring out 100cc of power from a 72cc engine.

    (What to buy, what type, what to configure and change etc)

    Anyway I appreciate many of the posts, thank you all

  15. #15
    Senior PakWheeler Follow
    saboor73's Avatar
    Join Date
    Oct 2013
    Location
    Karachi
    Posts
    10,553
    Follows
    25
    Following
    0
    Mentioned
    351 Post(s)
    Tagged
    14 Thread(s)
    Problems Posted
    0
    Problems Solved
    6
    Best Answers
    2
    Good Answers
    25

    Default

    Quote Originally Posted by vickytulla View Post
    these days 125 and 138cc head/Cylnder/Pistons are also in market price is around 13k for a set you can try that too...they produce enormous power and have a dedicated oil pump for each valve pair (its a 4valve engine) and work with saem 110cc Road Prince crank.
    @vickytulla can you tell me the name of the brand under which this produxt are been sold

  16. #16
    Senior PakWheeler Follow
    vickytulla's Avatar
    Join Date
    Oct 2009
    Posts
    8,421
    Follows
    38
    Following
    2
    Mentioned
    876 Post(s)
    Tagged
    31 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    the horizontal engines ? they are from genuine Honda - Made in Japan.

    Quote Originally Posted by saboor73 View Post
    @vickytulla can you tell me the name of the brand under which this produxt are been sold
    https://www.pakwheels.com/forums/motorcycle-travel-diaries/277725-sober-riders-visit-khunjerab-adventurous-way-via-nori-pass

  17. #17
    PakWheeler Follow
    mateen001's Avatar
    Join Date
    Jun 2014
    Location
    Gujranwala
    Age
    25
    Posts
    54
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    I told the mechanic to increase the Bore to 57mm and stoke to 42 mm (CD-70 engine) , new displacement 107cm^3

    Are these numbers okay? Safe? Wrong? Troubling? Im really confused about how different bike models have different bore/stroke ratios.

    Most bikes seem to have a larger bore vs stroke, Yamaha Junoon and Hayabusa have larger stroke

    Maybe a silly comparison but I read that heavyduty vehicles like Trucks, Hummer jeep have very large stroke in their engines where as nas cars, Formula 1 cars have much greater bore for higher rpms.

    There's definately more to an engine than cc's - internal components must match and work together and then overall engine design.

  18. #18
    Senior PakWheeler Follow
    saboor73's Avatar
    Join Date
    Oct 2013
    Location
    Karachi
    Posts
    10,553
    Follows
    25
    Following
    0
    Mentioned
    351 Post(s)
    Tagged
    14 Thread(s)
    Problems Posted
    0
    Problems Solved
    6
    Best Answers
    2
    Good Answers
    25

    Default

    Quote Originally Posted by vickytulla View Post
    the horizontal engines ? they are from genuine Honda - Made in Japan.
    @vickytulla I was not asking about the brand name of imported engine I was asking about the big bore kit you mentioned of 125cc and 138cc

  19. #19
    Senior PakWheeler Follow
    saboor73's Avatar
    Join Date
    Oct 2013
    Location
    Karachi
    Posts
    10,553
    Follows
    25
    Following
    0
    Mentioned
    351 Post(s)
    Tagged
    14 Thread(s)
    Problems Posted
    0
    Problems Solved
    6
    Best Answers
    2
    Good Answers
    25

    Default

    Quote Originally Posted by mateen001 View Post
    I told the mechanic to increase the Bore to 57mm and stoke to 42 mm (CD-70 engine) , new displacement 107cm^3

    Are these numbers okay? Safe? Wrong? Troubling? Im really confused about how different bike models have different bore/stroke ratios.

    Most bikes seem to have a larger bore vs stroke, Yamaha Junoon and Hayabusa have larger stroke

    Maybe a silly comparison but I read that heavyduty vehicles like Trucks, Hummer jeep have very large stroke in their engines where as nas cars, Formula 1 cars have much greater bore for higher rpms.

    There's definately more to an engine than cc's - internal components must match and work together and then overall engine design.
    any update

  20. #20
    Senior PakWheeler Follow
    vickytulla's Avatar
    Join Date
    Oct 2009
    Posts
    8,421
    Follows
    38
    Following
    2
    Mentioned
    876 Post(s)
    Tagged
    31 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    those engines come in qauds, trikes and mostly those engines have no emblem , no name no brand, just chinese bikes mostly named by the province in which they were assembled mostly hongzhou, ChongQong e.t.c....


    Quote Originally Posted by saboor73 View Post
    @vickytulla I was not asking about the brand name of imported engine I was asking about the big bore kit you mentioned of 125cc and 138cc
    https://www.pakwheels.com/forums/motorcycle-travel-diaries/277725-sober-riders-visit-khunjerab-adventurous-way-via-nori-pass

+ Reply to Thread
Page 1 of 2 12 LastLast

User Tag List

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •