speedfight 100 dellorto phva 17.5 problems - bike starts well but as soon as you accelerate it starves of fuel but is happy to tick over indefinately- carried out usual tests, fuel delivery good cleaned carb jets etc all fine.replaced e choke then replaced again with manual choke makes no difference. funnily enough if you partially remove choke by 1mm the bike then runs much better , but the minute you reseat the choke full the problems starts again. have never come across a problem like this can anyone help as its unridable. many thanks

lee williams, September 2010

hello my bike start when i suck the over pipe and runs for about 20 seconds then it sound like it drowning and then cuts out

kieran, April 2011

thanks adam will give it a go. cheers

lee williams, September 2010

what groove is the circlip on the slide needle set in ? try moving it to the groove nearest the pointed end of the needle.if that doesnt work then check the reed petals on the reed valve are not broken or cracked as ths will also cause the problem.

adam bike doctor, September 2010