anyone ever heard of this, mate bought one today and when going to have a look at it myself the engine casings and the shape of the engine is the same, all the same markings, including yammy on the side,powervalve, 3mb etc?? even when using google images and sc manual they all look like theyve got one cus i first thought previous owner may have put a dt engine in
as it being the shape of a rs125/ybr the differences i can see are that it uses a different exhaust, runs through the middle of the bike rather than to the side, different choke setup as the choke is on the handlebars next to the clutch, different rad, airbox etc
If it is the case, which is must be its probably the re/x engine as its an 08 plate, leccy start and has the kickstart option,
nothing much regarding them on ebay but im sure if they are the same it may be a cheaper way to get engine parts cheaper than normal because of them seeming not that popular??
They are licensed I believe. I don't think they are Yamaha engines but are using Yamahas design. I would avoid and suspect inferior quality personally but not 100%
not sure about the 2 smoke engines,but i know for a fact the chassis and the 4 stroke lumps are thrown together... mate had 1 for 4 mothns to learn on an it literally fell to bits proper shocking build quality,pity cos it handled lovely.....
he bought an 08 plate for 1300 :/ would of got myself a nice dt if i was him, but then again when i went down there he didnt know how to turn on the engine and when it wsant starting he blamed it on oil lol, when it really needed the choke ;)
never had a go on the stroker one like i say,but the 4 banger handled nice if it was mine i'd remove and replace every bolt with stailess and threadlock and torque them all as i went let us know how it goes with that lump in it...
the engines are yamah, the gilera badge is stuck on with doublesided tape and yamaha is underneath, the engine codes are the same as yamaha, and all the internals are the same as the dtre/x
(yamaha on his casing, not gilera :)
proper shocking build quality,pity cos it handled lovely.....
if it was mine i'd remove and replace every bolt with stailess and threadlock and torque them all as i went 
