Leaderboard

Old topic I know, but in discussing the merits or otherwise of CoP vs normal coils, no-one mentioned ignition interference suppression. This is a very big deal and manufacturers put a lot of effort into passing the strict regulations. Resistive plugs were a BIG improvement, but stuffing the coil right on top of the plug has to offer the best improvement of all. I doubt performance or even emissions really has anything to do with it. Ignition suppression is probably the biggest factor, but packaging now plays a very big part in vehicular design. Just trying to cram everything into the available space can be tricky and with bikes they need to be able to place everything for optimum weight distribution. CoPs are simply better at all these. Whether it's worth doing on an older bike is just down to personal preference. I like the idea of freeing up some space and saving a bit of weight. As long as they work correctly it'll make bugger all difference to the performance though.

Hi BusyLittleShop thanks for the praise. Greatly appreciated. With the urethane bobbins in the cush drive, you may as well say there is none, bar for them giving a little flex under load. There is no slop in the drive at all but I do think for chain/sprocket life, the bobbins are a good alternative. I've ridden many race bike with no cush and I understand exactly what you are saying, but for a roady, I think I still prefer a little give.