The 2015 Z2-140 has a completely BRAND-NEW chassis moving from a single spine to a twin beam construction. This allows for increased rigidity and thus stability ay high speed, but more importantly allows space for the extra-long rear shock & the subsequent huge swing arm travel. Stomp learned in 2014 that in order to match & then beat Bucci lap times, they needed more suspension travel, and the all-new chassis design is a direct result of that experience. The Z2-140 still boasts the ‘exclusive to Stomp’ SR140C/Z-40 cam engine. Stomp buy in the YX140 and then fettle the engine with stiffened valve springs & a high lift race cam (known as the z-40 cam). The result is 2 HP more than any other YX140 engine on the market. It might not be quite Zhongshen 155 territory, but its most of the way there and significantly cheaper to install than the Z155 which would see retail prices creeping over the £1000 mark. If you look after the SR140C, it will prove a very reliable and cheap engine to run. Stomp still retain the big wheel version (17/14) for those more into field hacking who need that extra stability in muddy conditions. Specification: Specification: stomp racing sr140-c z-40 race cam 14 hp all-up 4 speed gearbox start-in-gear 26mm carb race foam filter aluminium shot blast finish cases with stomp logo cnc oil cooler with braided steel hoses 735mm usd oil filled forks cnc machined legs with massive 8’ of plush travel finished in black anodise drop forged black anodised triple clamps (yokes) oval race alloy muffler 28 mm big bore front pipe, features full length alloy heat shield for style and protection sdg hubs with steel rims for strength hi tensile steel, light weight twin beam frame long travel nitrogen filled rear shock crf70 polypropylene hi impact black plastics kit 3m exclusive 2015 stomp graphics kit, factory fitted wrap around crf number board with front brake pipe tidy pro taper style alloy light-weight bars hydraulic front and rear disk brakes with light