As far as performance goes you can get just about all any china girl is capable of giving by just running a stock cdi, I've registered over 9000 rpm on two of my engines running a stock cdi, the jag and lightening cdi isn't gonna give any benefit, if someone likes how rhey look and like the idea of the bigger coil thats fine, kinda like chrome wheels doesnt make a car faster......So map are u saying running a stock cdi is the way to go......jag and others are a snake oil product.
Just speaking in general terms here (and my background is with V8 cars) the products in question aside here, there must be something in being able to fine tune your timing to suit individual motors, 4 stroke cars for example, the factory always soft tunes cars, with no other mods, fine tuning the advance curve always improves drivability and throttle response, even more so, once you raise the compression ratio and or improve valve timing it is a must to alter ignition timing.
FWIW all the hard core bike guys spend hundreds on the best CDI to improve performance.
Two main issues are 1, spark strength and timing.
The higher the compression ratio the stronger the spark needs to be.
Timing needs to have a slightly different curve than standard and will, in most cases, need to be retarded at WOT with higher comp/rpm and improved port timing.
A standard unit may be suited to mass production but once you play with these things, head, compression, porting and the like then you will, in my opinion, need some way of improving the ignition and dialing in the timing.
Well, Toothy what I say on all of this isn't etched in stone by any means... , but I can speak from personal experience and relate to what other have said they have experienced, I know there is suppose to be a new version of the jag cdi that doesn't have the big timing retard in it like the original model had or has, what you have may do everything you ever need or want it to do, I say if you're happy with it and if it aint broke leave it be... no need to fix something that aint broke, just ride safe and enjoy it just like it is, obviously jag is still making his. Di because people like it, I have said what I have to let people know that they shouldn't buy the more expensive ignition parts under the impression that they will see a noticeable power or speed gain, when it has been proven that the stock unit does a good job for cheap, if someone enjoys tinkering and trying new gadgets and gizmos like I do then by all means buy one and try it out... I waiste a little money here and there on my bikes but its part of the hobby for me and I dont chance more than I can afford to loose, like I said I have a Lightening CDI and I have a Rocket CDI and several stock units, I plan to test lightening against the rocket for top speed and I know that there for sure wont be any felt difference up to top speed between the two, but I cant tell someone they need a Jag a Lightening or Rocket CDI because it will make their bike faster becausethat just isn't being honest.Map,
I really respect what you have to say. I bought the unit within the last three months so it must be the latest and greatest. With no prior experience with basic china engine set ups I can't compare. What I'm running might be great or poor to someone in the know. I really don't want to pull my wiring to see......but would I be better off with stock? ....got to try, damn!!
These bikes are a challenge .... The gf is laying down some heat!
seems swapping CDIs between the two bikes could yield an answer to whether it is making a diff.One bike is running a stock cdi and the other isn't, it could be that the better coil is helping out some on the one bike but the bike with stock coil will scream at mid 40's mph pulling myself at 215lbs