YAMAHA XTZ 125 188cc 66mm bore up / YBR / JYM / D.I.Y.

Update 2nd Feb, 2021
The bore-up engine had a serious problem of overheating.
The problem is presumed to have been caused by poor heat transfer due to machining at the bottom of the cylinder.
It eventually failed to drive 100km and replaced it with a 140cc spare engine.
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Homemade YAMAHA XTZ 125 188cc 66mm bore up
- 66mm bore-up kit from Aliexpress
- Aftermarket high cam
- no EGR
- roller rocker arm
- PZ27 carburetor / main jet 105, pilot 35
- EU 2 CDI
- 5 friction plates of the clutch

[@kamparuma6287]

I2 ang matindi na upgrade,,musta nman kaya i2 sa longride

[@BasaysayTv]

what size of jettings u use and fuel screw turns?

[@Gustavophilipee]

Bom dia, sou do Brasil gostaria de saber aonde posso comprar esses braços oscilantes roletados, pode me ajudar?

[@marieteryzhbalonga2817]

Hi Bro I have yamaha xtz 125 and I want to change my bore kit . Do i need to change the connecting rod? Thanks

[@rodelferenal6215]

Hi,magkano Ang magastos magpa change ng bore kit at connecting rod,ipagawa ko maging 188cc,,xtz 125 motor ko.

[@shaidalompay9476]

Paano po kinabit ang oil coler

[@vintagevelo1392]

Hello my friend-whats a real incrase of this mods?

[@pogz2021]

I HAVE MY XTZ 188 CC CYLINDER HEAD IS MIO HEAD WITH 4 VALVE HIHI ALSO CYLINDER BOR IS MIO plig and play all stock connecting rod today he's birthday 5 years no problem 5000km change oil yamalube violet label stock carb hehehe

[@claicodake]

boss my xtz din ako gusto ko gayahin sayo. meron ka available na parts para dito ?

[@Megafacu1]

hllo bro , what is the model of the head ? thnks !

[@bobbertomster]

How does the bike run after 10month?

[@Kaputolan]

Boss ano pong high cams ang ginamit mu?salamat

[@user-sx6qu2bh2t]

Hi buddy, I have a Yamaha YBR 125 and I want to change roller arms to avoid the ticking noise from the engine, can you tell me what bike they are from or a number to buy.

[@SNsLife]

Hi Bro, The number of roller rocker arm fit to ybr125 is '5WB-W53020-00'. :)

[@user-sx6qu2bh2t]

@@SNsLife Hello friend, I can't find anything on the internet under this number, can you tell me where you bought them from so that I can order them too

[@user-sx6qu2bh2t]

Hello friend, I can't find anything on the internet under this number, can you tell me where you bought them from so that I can order them too

[@SNsLife]

@@user-sx6qu2bh2t
Hi bro, You can order it at the Taobao under the link.
item.taobao.com/item.htm?spm=a1z09.2.0.0.67002e8dLFYPLj&id=528068611751&_u=t3ajo2hed8d8

[@Gustavophilipee]

A gente que é do Brasil sofre, não entregam aqui

[@kamandagngisangmaniklad2498]

Boss pano mo kinabit ang oil cooler nayan?

[@SNsLife]

Terima kasih.