Well that was interesting, most expansive overalls I have ever worn, my leathers!
1st day , 1st track session 3 slighting laps. Went out and lined up , engine revving cleanly. Out on track started to misfire, felt like the engine would clear, but it didn't. Had run bike at Mallory previous August, over two days with no engine issues and had not changed anything since to the timing side of things. Came in from that session and changed the spark plugs, engine running now revving freely.
Next session , same misfiring, pretty much has soon as the bike was on track. Brought her back in, drained petrol in tank even though I put some of Esso's finest in only approx 2 weeks previously. Engine seemed to run OK, next session mis fire returned.
Noticed when the misfire occurred the rev counter needle would flicker, and at time the shift light(led) would flicker ( very faint) indicating to me a
stray voltage. Swopped out Lithium battery for a known good gel one, even though I have fitted a Rick's Motorsport Voltage/reg built to charge Lithium batteries correctly. Same fault on track.
Ran through ignitech test procedure which was fine when the engine was cold , and appeared to be fine within minutes of misfire appearing.
Check coils out when cold and straight after misfire with multi tester - Ok. There were times when we didn't or could see a spark.
On the bike is a oil temp gauge which indicated approx 25c when misfire occurred.
So is the problem time or heat related ?
Replaced PCB timing pick up board, same result.
I have 3 washers behind PCB board mounting post, decided to remove 1 washer on the Monday. Thus moving board inwards. Sunday afternoon I had received permission from Focus Events to run the bike around a piece of tarmac which I think is used to layout a Go Kart track. Ran the bike around for 15mins with the PCB board set with only 2 washers, ran OK. Back in garage splash of fuel, out on circuit ran well, went over Start and finish line, misfire ********.
Tuesday removed another washer, bike started but didn't rev freely, felt woolly.
Due to track conditions , and not having any rain tyres, had to wait till approx 1400 before going out. By this time it was 'Open Pit Lane'. No misfiring out on track but the engine was just flat, brought the bike straight in. First positive the tyres ( Michelin Power GP2 ) felt good in the damp conditions.
Will be collecting bike from Focus Events 21st, but have already arranged to try another black box - Thanks Rob.
Big thanks to the team for their support, managed one complete session on Tony Jimenez's V twin Aprilia , thanks Tony.
feeling excited.
will be your gauge ( and any new aches and pains regarding riding position)
