i tried the wd40 but the switch seems fine, I have tested the hd leads, checked the spark plugs etc. i have also checked the fuel is coming through and opened up the fuel tap and everything. it seems to only run bad after a good thirty minute run. it runs fine when cold and starts no problem and will sit ticking over but after a long run it cuts out at lights, dies on the straight (and catches again before it stops completely) just runs very badly. any ideas?
i have had a look through some of the earlier threads but am not having much luck.
i can't understand why this problem would only occur after a good run . . .
i am a bit of a novice so any ideas would be very much appreciated.