YinXiang 重庆银翔摩托车(集团)有限公司

[TB-Racing]

Yeah I figure when they say they do not warranty the race engine that they do not last long.
I wonder about the Daytona engines, they are not cheap at all.
They have upgrade kits for them, that include a temperature gauge and they say stay under 90 degrees Celsius.

TB Racing, in your experience, which Chinese stock "big bore" horizontal is the most reliable, durable and suitable for everyday use?

G'Day Zorge,

Really like the original genuine Jincheng 50-90cc engines (great tuning potential) for Z50 bikes.

Own a few Zongshen 124cc (ZS154FMI) engines, some of the ZS154FMI engines (4-speed manual gear box) are bored out to 138cc with race cam and cylinder heads modified, great torque monsters (not really revvy engines). Unfortunately Zongshen discontinued the reliable Zongshen 124cc (ZS154FMI) engines 2-3 years ago and just before they did ordered a few for myself and other Z50 owners.....

I am a active member of a few international Z50 "Monkey Bike" boards and the Daytona engines (made in China under license for Daytona / Japan) get some very good solid reviews.
Apparently they are about to release a new generation of the Daytona engines with stronger cases, improved gearbox = better gearing (ratio between 2-3 gear) and a decompression cam for easier starting next month.

Now, high performance big bore engines, nothing beats a custom hand-build Z50 horizontal race engine using either the old Honda GB4 engine cases, a Honda Nice 108cc (Thailand) or a full blown Takegawa engine in my opinion. Building another engine right now but that special one off custom race engine will take some real time.....

Attached a pic of the Zongshen 124cc (ZS154FMI) engine (ZS154FMI-2*xxxxxxxx* <> X = engine numbers) with Honda SS50 style clutch and engine cases. They are bullet proof and ultra reliable with a great gear box (4-speed manual 1-N-2-3-4) crank mounted clutch.