And I'm going away on Sunday :/ Struggling to get up to speed, backfiring and popping. So far I have: Reset rocker clearance to .006 Set timing to the 8 (7.5) degrees (but won't run nicely) Played the the carby but nothing seems to change.... Odd Changed no.4 spark plug even though they are brand new NGK, pulling no.4 lead didn't seem to make much difference and now it makes a bit of change if the lead is pulled. Still not running better, I can't figure out what I have done, I haven't even been driving it. It has a new bosch coil and eBay electronic dizzy and single fake Weber.