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Hi folks! I just wanted to know whats your experience with shimming the 155z to reduce the axial end play of its shafts? It seems to be a bit controversal, I read proper shimming should give a litte less wear/more durability but on the same time this kinda engines seem to need quite a bit of...

Hi folks! I just rebuilt my engine (zongshen 155ccm) after changing a broken intake valve. I did test compression with a (cheap, analog) gauge and it says about 7bar (~100psi)... Compression ratio should be 11.5 : 1 according to webshops that stock that engine. I did bed the valves with...

Hi folks! I'm currently working on my ZS155 engine (runnning a oko28 flatslide). Got a akunar cam (midrange) and HD valve spring set on its way. In the meantime I'm flowing/porting the head. Carb is set up pretty much spot on for current setup. Now I thought the next thing to optimize...

Hey folks, just wanted to share some pics of my ride. It's the latest model stomp KZ (UK) with some ups: -Zongshen 155ccm -OKO 28mm Flatside -Kayaba 36mm USD forks (275mm travel!!) -UFO plastic kit with Metal mulisha decals -replaced EVERY single screw with high grade ones -renthal fatbars...

Educate me about the Zongshen 155 please Hi folks! I gues I heaven't introduced myself yet, I'm watchin this site since about half a year since it's got very informative tech sections! I'm 23, living in Austria (yep, pretty much on the other side...) and got a Stomp midsize pitbike last...