The reason I say change dizzy is my first Rs all of a sudden wouldn't run only if I kept the revs up through eccelerator if I let of it would die it would start but only run for 15mins then cut out then wouldn't start for 15mins then run for 10mins then wouldn't start for 10mins then 5mins and so on then some1 suggested dizzy as there was something in it that would get hot and break down so I changed dizzy for a new 1 and was sound after that if you can get a good second hand 1 just to try see if that works