Good day all together , I have the following problem at my Peugeot Kisbee 50ccm , who had for half a year the problem that he occasionally stuttered and did not reach his 50 km/h anymore but only 30-35 uphill only 15. he also always had misfired while driving ( I think , because the continuously out of the exhaust when driving banged )I tried to find the problem unfortunately without solution . About 2 weeks ago he then did not go at all ! What did I try everything t ? Petrol distributor is in order hoses are densely cleaned carburettor ( auxh a new carburettor tried ) intakes replaced ( because the porous was) new spark plug All oil renewed ( because it was time ) spark plug renewed ( then he jumped on but ran much worse than usual and had only thrust power up to 25 km/h and took no gas went down to 5 km/h approximately and took gas again ) It is a 4-stroker has everything original nothing changed but no G arantie more is a year of construction from 2013 and has about 3,500 km on it.