Kytronic & dyno jet changes
Posted: Fri Mar 07, 2014 9:50 am
After several trials with various retard units i tried the new kytronic to attempt to dial out the usual mid range 'dip' on tuned engine, the fitting and set up are very simple although can bit a bit tricky to get on the CDI as the spade terminals are not quite in line.
There is a great set of instructions on the MB site and the initial trial used the extreme settings D&E but the drop of 12 degrees left the engine a little uncomfortable on the road, it was like an on off switch.
Finally settled on curve 7 which seems a little conservative but actually evened out the engine and created a really smooth curve and even a easy ride with power coming on at lower revs and holding through the range so no changing down!
The engine spes is road tuned TS1, camlam ultimate crank, v force, TMX35 and franspeed race exhaust.
The key point was at most settings the mid range dip in timing created quite a lean spot, the change needed wasn't a simple clip change but a completely richer needle! Following a conversation with Andy Francis he also confirmed this with some work he had completed with his exhaust.
Conclusion, a great product without the expense of a full variotronic however it needs careful setting up and close attention to the jetting.
The final setup resulted in a 2.0 pilot, 310 main and the needle change was from 57 / 3rd clip to 56 2nd clip, Andy had mentioned one setup even needed a 55
There is a great set of instructions on the MB site and the initial trial used the extreme settings D&E but the drop of 12 degrees left the engine a little uncomfortable on the road, it was like an on off switch.
Finally settled on curve 7 which seems a little conservative but actually evened out the engine and created a really smooth curve and even a easy ride with power coming on at lower revs and holding through the range so no changing down!
The engine spes is road tuned TS1, camlam ultimate crank, v force, TMX35 and franspeed race exhaust.
The key point was at most settings the mid range dip in timing created quite a lean spot, the change needed wasn't a simple clip change but a completely richer needle! Following a conversation with Andy Francis he also confirmed this with some work he had completed with his exhaust.
Conclusion, a great product without the expense of a full variotronic however it needs careful setting up and close attention to the jetting.
The final setup resulted in a 2.0 pilot, 310 main and the needle change was from 57 / 3rd clip to 56 2nd clip, Andy had mentioned one setup even needed a 55