Hi Guys,
Got my ETZ re-built after the big end bearing flew away about a year ago, and obviously somewhat taking the piston with it.
The piston was 0.4mm clearance to bore anyway, so decided to get an over-size and re-bore the barrel.
The barrel / head are a re-bored 250, so thought it wouldn’t be any real issue to get it sorted.
Anyway. Engine re-built, squish band at 1mm, timing at 2.5m BTDC and it runs backwards 50/50 chance!!
I put the timing to 3.5m thinking that it is running backwards because it is too retarded?? It runs forwards now, but not the best punch.
Before the rebuild I was running at standard timing and had no issues, is it perhaps now owing to the compression being so much higher perhaps?
Any help guys? Want to get this otherwise punchy machine run in and running nicely for those Summer Jaunts in the country..