i dont tknw is there any engine for sale in the market now
best engine are RX115 or RXK135
Recently i bought RX125Z engine its also great engine kind of RXZ IN 123cm3 and these 125cc engine with y.e.i.s are very rare
RXZ135 engine is also great engine
but being in PAKISTAN we have to care about availability of engine parts and also those parts too whom would be relate dto engine performance
115,125,135 the parts of these engine are almost same one can easily swap from here to there, n the performance of these engines are well known n proved, rxz paida bhi nhi hoa tha jab rx k engine nay legendary role play kia tha market main, is liy hum 115 k engine ko let down nhi kersktay
if one would have good engine of 115 or 135 than i hope it cud fulfil his demands and aims on road
but when we compare two stock rides, as like rx115 to rxz then no doubt the new toy has edge on 1980,s tech
but keep in mind i am talking about only stock bikes
jahan tak Z k engine ki bat ha to no doubt us ki performance good hoti ha 115 ki body main but like stock nhi hoti coz i have ride original rxz...... and its quarter throttle response is still with me
z k engin ek frame main lganay k liy thora frame alter krna hota ha @waseem you know it already
engine ki performance would required a combinations of parts, both electric and mechanical
if you need to install z engine then the required parts will be
1-engine rxz (5pv1 or 5pv2) latest models
2-cdi (double pulser) original 55k
3-plug coil (3v6-mo) original yamaha rxz
4-exhaust rxz 55k
5-carburetor (55k-01 or 5pv-00)
this is the real combo
karachi main mechanics rxz ka engine bikes main lgatay hain but due lack of parts woh log coil or cdi original nhi lga sktay and by the way mechancis ko original parts numbers ka bhi nhi pta woh to bas jogar kr rhay hotay hain jahan bike jis kisi bhi parts pr fit beth jay un k liy wohi original part ban jata ha
so i wont recommend you rxz engine withut having original supporting parts
and one thing more if you have all the parts but cudnt get its original carb then the all above parts are useless
i m talking about real rxz performance not jogari engine
its better for you to get 135 engine the more power the roaring sound, hope for the best