Although I’m a dire 2 stroke fan and will cling onto them kicking and screaming, unfortunately 4 strokes are the way forward with emissions laws and so forth, but they’ve always been slow. Well not anymore! The amount of tuning parts for Chinese scooters is surprisingly low considering they’re generally the best selling scooter when you group all the various brands together who sell the same basic scooter, but there’s now enough parts out to get a fairly good performing scooter, although it still won’t be a patch on the 2 stroke scooters. Unlike the 2 strokes where the exhaust makes quite a large difference in power delivery, 4 strokes aren’t affected as much so firstly I’d recommend fitting a big bore kit, after all, there’s no replacement for displacement. Airsal manufacture an 80cc big bore kit for the 4 stroke Chinese scooters, which is a surprisingly high quality piece of kit, with an Aluminium cylinder and nickel silicon carbide barrel coating for minimal friction, which helps when you consider how many piston rings the 4 strokes have! Fitting the Airsal big bore kit is fairly simply on the Chinese scooters, although it’s still a lot more complicated that two strokes since you’ll ...

Although the Peugeot Speedfight 50cc engine is quite slow out the crate, the engine (especially the LC 50cc version) is very responsive to tuning as long as you use the right parts. As with other brands of scooters, always go for the best quality parts when tuning Peugeot Speedfight 50cc’s and not any old cheap crap. The same 2 stroke engine is fitted to most Peugeot scooters, so this guide also applies to the Vivacity, Jet Force C-Tech, Ludix & Blaster models. Peugeot Speedfight 50cc Tuning: Performance Exhaust Although I usually recommend fitting a Giannelli exhaust to most 50cc scooters when tuning, Peugeot Speedfights work very well with LeoVince performance exhausts as well. For the Peugeot Speedfight, both these exhausts are similar priced with the LeoVince ZX being £126 and the Giannelli Reverse exhaust being £117. As always, the decision is between maximum power and reliability; the LeoVince ZX is a slightly higher performing exhaust and has roller weights included with it, but the Giannelli Reverse comes with a warranty. When tuning Peugeot Speedfights, bear in mind LeoVince exhausts come with a restrictor cone in the manifold end of the exhaust that is tack welded on, you’ll need to grind / hammer / ...