FinnRC36

I am using GP-shifting on my 3rd gen. It was accomplished by using gear linkage that is not pivoted around the footpeg but a bit forward. It was from an old CBR600F. I had to drill and tap a M8 mounting hole to the foopeg hanger and lengthen the shift rod. The linkage I used is steel so I could weld them myself. I don't know if there's enough material to drill and tap the footpeg hanger on other generations. Here's a pic of my setup: It looks like it fouls on the side stand bolt but doesn't. It's very close though.

I don't see how this would work on any of the 180 degree motors as one piston will always be at BDC when the other is at TDC per bank. I could see how it would work on a 360 degree motor though. When you 'twin-twingle' the V4, your pairing changes from across the bank to across the V... so you do in fact get both paired pistons at TDC at the same time. Whether this is relevant to the discussion I'm not sure - I am only about 80% up on the content here so far, but will learn more because I want to run a coil on plug set-up too :) You really can't have two pistons at TDC at same time with a 90º V4 with a 180º crank no matter how you you turn the cams. The piston position depends solely on the crank and the v-angle. So I can't see how that would work without changing the crank to a 360º or 90º one (which doesn't exist to my knowledge).

I don't think this could work with the VFR's 180º crank as there is there are no two cylinders that are in TDC the same time as with a 360º crank you can pair 1&3 and 2&4. This connection only allows to run to 2 different timing advances which is fine for conventional I4 or a 360º crank V4 engine but with a 180º crank the other cylinder would be in BDC with a fresh air/fuel mix while the other cylinder is ignited. I think this is the reason 3rd and 4th gen have 4 coils and 4 coil drivers with individual timing. If you'd pair 1&2 and 3&4 the other cylinder would be half way to exhaust or intake stroke while igniting the other depending on the cylinder to be ignited. Is that a problem I don't know but I have doubts. Also the paired coils would have to get signal from both coil drivers and this connection does not do this. I think the same goes to 5th and 6th gen also as they have 180º cranks also.