OK, get all that.
But as long as you make a note of how much you back the mixture off, I don't see how that would be a concern. sure it'd weaken the mixture across the range but they often leave it running a little rich. It is obviously tuned on the "performance" side, even if just a tad.
all I know is, that if it was me, that is what I would try first.
Does your oil smell of petrol?
Of course you could take it back to them, they got your money after all, and ask them about it.
Best of luck, I know one could get a bit hyper about this, but they are pretty robust machines.
Thanks for the patience with this lad Stan, much appreciated.
Having tried BPE5 plugs to no avail (except the introduction of pre-ignition) I did a few things.
1. I put the BPE6 plugs (cleaned up with a gas torch) back in.
2. I popped the top off the SU Carb and reset the jet to the recommended "starting point" for tuning.
3. I swapped the heavily filed "Custom Needle" [god it had been hacked about] and put a stock BDL needle back in.
4. I ran it till it was at normal operating temperature then set the idle revs and made the jet adjustment as per the SU manual and then reset the idle speed on the idle screw.
I have been out for a blatt around the town just now and up that hill a couple of times, no performance or any other issues. Got home and it was idling rock steady and not missing a beat.
When it is cooled down I will pull a plug and take a look.
Now it went to that tuner with a BDL needle in it and it was problematical at that time.
One of the other things he did change as well as the needle and the "tune" was he changed the coil and declared the one in there was for a contacts ignition and NOT a high power coil for contactless ignition.
So, it is potentially possible that my original problem was the "wrong" low-power coil and the BBA needle it came to me with or the BDL needle I fitted would have all been fine with the correct coil.
I really don't know.
I am a novice in these matters, but I can convince myself that this scenario is what has been happening.
What I can say for sure is that the "Tuners" idea of a tune was just all excess petrol for max BHP with no regard to engine longevity. "
Bore-Washing-R-Us".
I shall wait and see how it goes over the next week or so.
