Illegal Yamaha 125Z Racing Bike

July 20th, 2008 3:27 pm by

This article is taken without permission from http://www.mysportbikers.com/portal/index.php?
option=com_fireboard&Itemid=27&func=view&
id=1017&catid=52&limit=6&limitstart=6.
Hope they will forgive me!

Please go here for the original content of the page.

What was modded on that bike…?
block and piston
- Original Yamaha 125zR block.
- Bored tu 57mm using DT125(enduro) RK brand piston.
- Ported and polish the block.

Engine head
- OEM header.
- Skimmed the header and polished it.

Clutch
- Standard Y125z manual clutch system.
- Original Yamaha friction plate.
- GT Racing clutch springs.

Carburation
Actually that bike got 2 carburetor unit.
- Carb Mikuni for Suzuki Panther 150. [Main jet 300, pilot 28.5]
- Keihin PWK 28mm. Ported to 30mm. [unknown]
- paired with FCCi Racing reed valve.

Ignition
- Fully Standard. Even the CDi is standard.

Exhaust
- BM Power + YY Pang exhaust manifold + custom made end can silencer.

Suspension
- Standard OEM front and rear suspension system.

Final drive
- Using 15/34 MCS sprocket setup with TP Racing 415 chain.

Wheels
- COM* 17×1.4 alloy rims with hi-polish 125z hubs.
- Camel 50/90 tyre. very2 kecik punya tayar.

Brakes
- Standard front disc brake system.
- Rear disc brake system was removed due to no use of using it.


Security

- None. This bike was staying in the house all the time except when it was needed on the road.

Which shop do all this ?
- my friend’s house. Of coz la this is his bike.


How fast can it go ?

- 180km/h on 4th gear. after that cant calculate due to meter limit is only at 180km/h.
- 16sec for a kilometer.

Please remember: RACE ON TRACK ONLY! DRIVE SAFELY!

All feedback, comment and criticism are welcomed for us to improve the article and this blog. You are invited to response in the comment section below. Thanks.

13 Responses to “Illegal Yamaha 125Z Racing Bike”

  1. 135lc JB says:

    In Johor,the new model of 135lc modified and reach up to 267km/h with custom made Thailand parts.You can find in Skudai.Owner is a chinese.The bike was also fully modified with Racing Boy parts.If you have $$$,confirm everything you can reach but also have limit la…

  2. Kishan says:

    hi chesecake,
    no offend too, but i own a 125z as well, and modification few years back while i was in kolej, used RX-Z carberator, with LC piton, one piston ring, sprocket 14/35, and my 4th gear was hitting the 180km/h already, and can easily exceed 200km/h when using 5th & 6th gear, i tried with RR & RX-Z & etc.it is possible, when i ride, i use only upto 5h gear, 6th gear is too fast already bro, so yes, it is posible bro….and the feeling is wow!laju!!!!!!!!!!!!!

  3. eddy says:

    Why not, CheeseCake?

  4. CheeseCake says:

    No offend bro but 180km/h on 4th gear is impossible based on your mods. Again it is impossible to go 180km/h on 4th gear based on your mods.

    If u said 5th gear at 180km/h then i believe. 5th gear can go even faster than 180km/h.

    But if 4th gear happen to go until 180km/h on your bike, then it must be something with your speedo.

    Peace.

  5. sayrool says:

    125z kome parak gler minyak,kalo nk tuning kasi jimat ckit cmne bro?

  6. york says:

    bahagian enjin apa yang nak di ubahsuai dan di install dengan part apa,coz motor masih original belum di ubahsuai lagi

  7. york says:

    apa part motor yang perlu di tukar untuk menjadikan motor power kuasa enjin dan apa nama part dan motor yang nak di ubah suai ialah y125z

  8. Bro says:

    kalo ko xnk usik block susah la.pe kate ko cari block len je jgn gune yg ori.ko adjust block ckit je n tkr spoket mmg leh mkn la stkt rxz..

  9. Anonymous says:

    dekat sarawak SS2 dapat cecah 235KM/j
    135LC kat sarawak dapat main 125z…
    LC tu cc die 210cc…entah apa mende dia orang ltk dalam LC tu

  10. Razi says:

    Salam bro..

    Aku nak tolak Performance Carburator Mikuni TM Flatside. Ukur lilit antara 34 ke 36mm aku tak sure tak ingat. Berminat email kt aku semilirsakti@gmail.com

  11. FiQ_x says:

    i use y125z..i jus wanna make it a little bit fast..boleh makan rxz sudah la…but without touch block(mengusik block moto,jus kai standart jerk block)..
    apa yg perlu wat ek??
    tolong beri nasihat..

    -fresh border-

  12. Halole says:

    i don’t know. you need the read the original source of the article. IMHO, i think a lot of race is won.

  13. rem says:

    how many races won by using this bike? huhu.respect ah,nice mod

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