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Mate I cleaned the spark plug and pulled the head thing off that the spark plug is screwed into. Wire brushed all that up. Cleaned the foam from the air filter and also put a hose back on that fell off a while. This hose is about 8 cm long and 3 cm in diameter. I think it's some sort of air hose. Anyways put all the bits back together and scooter is running smooth as again!!! It's fixed. For now anyways. Thank u so much for all ur help. I really appreciate it. Cheers

Also where is the auto Marie choke on this thing.

Ok. So would thy explain why when the bike starts and it's cold it's good and runs well with full power then all of a sudden its power drops out and there is none

I don't know how to check all that stuff haha. As I said I'm a major noob when it comes to scooters. Ok it take about 5 mins to get it started the first time. Then u can turn it off and start it straight away after that. It's not just under pressure. It's basically when it's warmed up after about 5 mims of riding it. So after 5 mins of riding it,it will be at full throttle (not full speed) and all of a sudden all power just dies. It takes between 20-30 seconds for complete power loss. While I'm still holding the throttle on full the bike isn't moving but it hasn't turn off. Maybe it's getting too much oil or something? It has 4778 kilometers on it

Would the fact it was marine grade oil he put in it screw the scooter?

my vibe 50 2t is totally failing. Strays perfect every time no problem. Could idle forever if I wanted it to. The problem starts when I put pressure on the bike. Eg; going up a hill. Two people on it. I'll have it on full throttle and it will b all good. Then go up a hill and it just slowly Boggs out. Within 30 seconds it's bogged to a stop (still running) still on full throttle but the bike has no power and is making a rank bogging noise. Still idles fine after this.