How to derestrict the carb on some 50cc 4 stroke mopeds/scooters. Mainly Chinese GY6 engines, but some others use the same principle (Piaggio Fly, Vespa) Sam Just got my new RS4 50 Replica modell 2015 sport bike. Unfortunately the RS4 mopeds sold in Sweden are restricted to 40km/h. I am not interested in breaking speed records or so, I have an A class motorcycle license and own a BMW F800R and a Honda CBF125. I just don´t like that the RS4 will not perform as much as it can.
At the bottom of the range, the 49 cc “50” runs a 39 mm bore and 41.4 mm stroke with a blistering 1.9 horsepower and 3.0 pound-feet of torque. The engine is restricted to 30 mph, though with
First you should clean the power valve to remove built up carbon and rubbish. The wire is located near the Yabbard under the Gulloide Monk. This must be lifted out and the accumilated dog detritus
Fresh oil, fresh air filter, fresh fuel filter, new spark plug. Gap the plug to whatever its sposed to be set at, get the valve clearances done too while you've got the feeler gauges out. Clean the chain, clean it realy realy well, lube it well with some decent lube and set the tension just right.
Fantic revolutionises the MY 2021 Motard range: here is the new XMF 125 Performance. The brand new Minarelli 125cc 4-stroke makes its debut, a latest generation electronic fuel injection engine capable of ensuring an increase in performance while complying with Euro 5 homologation parameters. General information. Model. Fantic XMF 125 Performance. The only thing that is really restrcting your speed is the washer in the variator. The exhaust restriction is just a power restriction which. If you only de-restrict the variator, as there is a power restriction still on the engine the scooter will not be able to get up to 45mph. It will stay around 38mph give or take. If you are 16 you will need to buy a 2 stroke bike to de-restrict for more speed. Birky_41. 4,200 posts. 181 months I also have a Lexmoto Hunter 50cc. I have put a new 125cc exhaust on, and a A ‘grey area fix’ (your 49cc scooter still looks stock and has a 49cc VIN but is 80cc) is to put a big bore kit on your 49cc, you won’t really go faster but you’ll get to your top speed faster you will definitely feel that. You’ll probably need to tune the carb, I needed to change both jets on a stock 49cc carb. WEgpdn.
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    • how to derestrict a 125 4 stroke