vespa pk 50 with 100cc

[todd the mod]

my vespa pk 50 with 100  kitt on it will not let me run it for more than 15mins without it dying but when it dies it give off the sound as tho the timing is out but i keep checking at it is fine also it will just start to die and i will give it throttle and it will sound like it is being starved of fuel but i have checked the jets and fuel tap and they are both clear   

so if any of you have a suggestion on what it might be would be a great help as im only 16 i only know the major parts

[tiger]

have you changed the carb and the inlet manifold as this would starve your engine of oil if you still have the fifty one on and make it overheat or sieze

[todd the mod]

well it has the 100 carb and all that stuff on i was just wonderin that 100 kitt is faster than the 125 i had on it so maybe the kitt on it atm is 125 kitt because i bought it on e-bay and the guy wasnt to sure wot size it was he just said he thought it was a 100 do u think that might be the case because i have checked every thing out  ... .......  well thank you for your suggestions   they are very much apreciated in this frustrating time for me

[Worz]

If it really is a PK50 engine and what you bought from Ebay is really a kit, then it's probably a 110cc-112cc. That's the maximum 50cc kits go to.

[todd the mod]

well i bought the whole engine complete so maybe it was more than a 50 to start with i dont know  do u think it is worth tryin to find my old carb and everythin from the 125 and see if it works

[Worz]

It's easy to find out what engine it is. Under the rear shock absorber, on the engine itself, is a square flat bit of engine. Wipe it over with a cloth. You should have the engine number between two stars: * 00026343 *. Just above that is the engine model number: V51A or V15B. Let me know what that bit says.

[todd the mod]

right well i am actualy off to spain for 2 weeks  so i will have to give you the number when i am back and can i just say thank u so much for ur help and u have made me feel realy welcome so thank you