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Product Code: MBO022

YX 140cc Engine Kit – Z40 Cam (Manual) Kit 1

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The new generation of 140cc engine from the YX factory. With the factory fitted Z40 Camshaft upgrade, the factory claim 16bhp at the flywheel from this engine. The YX 140 engine is one of the most popular horizontal lay flat engines in the world and having had so many slight revisions over the years to tweak this masterpiece to perfection this is as we would say one of the strongest engines you could put your money into.


Why are our engines different to other sellers engines?


Other seller engines:

Engines are sold boxed, un-opened and unchecked and with no adjustments carried out which if left unchecked could cause potential problems and furthermore serious damage.


Our engines:

We carry out a full inspection to ensure all components are present and make all adjustments “Which are always required” to timing and valve clearance settings. We drain the transport oil which is not suitable to use for running your engine.


What does this mean for me?

This means your engine can be fitted straight into your bike with the peace of mind that a professional technician has set it up to run perfectly for its breaking in period, which is the most important point of the engines life……. just add good quality 10w/40 semi synthetic motorcycle oil and away you go.


Engine can be used to upgrade the following:

Pit Bikes, Honda Dax, ST, SS, CUB, Monkey, Z50, Mini Trail, Chaly, ATC 70, ATC 90, the list goes on and on!


Comes complete as follows:

-Complete Genuine YX140 140cc engine with Factory Z40 Cam upgrade 16HP

-All-up 4 speed manual gearbox N-1-2-3-4

-Removable side cases

-Output sprocket


Complete with:

-Inlet manifold and spacers

-12v coil stator fitted as standard should you wish to run lighting.


These engines are 440mm long, 280mm wide. Top mounting is 93mm wide with an 8mm bolt hole, Rear mounting hole is 82mm wide with an 8mm hole. They also have the 4 M8 threaded holes on the underside which are 88mm apart left to right and 44mm apart front to back, These are to hole centres.


Please note: All our engines need to go through a braking in procedure.


Please follow the engine installation guide we include as this will helps you in setting up and getting the most from your new engine.



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