andy.t Posted February 20, 2012 Report Share Posted February 20, 2012 Just wanted a bit of advice on Electronic ignition. I'm thinking about fitting some Electrex World electronic ignition on my AJS Stormer and was looking for a bit of confirmation as to whether it would noticeably improve the engine pick up from low revs. The bike is fitted with points and set up 2mm btdc a the moment and does actually run a treat but I keep telling myself that static ignition like what I have can't be getting the most out of the engine. Any advice from any two stroke experts out there, I know some of you must have been motocross stars at some point. Cheers for any replies. Quote Link to comment Share on other sites More sharing options...
jon v8 Posted February 20, 2012 Report Share Posted February 20, 2012 Most people say that the performance benefit is further up the rev range where the electronic advance starts to come in - rather than the fixed original setup.I would have thought that easier starting and smoother running at low speeds would be just as welcome. Plenty of people around here have adapted it to allsorts of bikes with excellent results. Quote Link to comment Share on other sites More sharing options...
andy m Posted February 20, 2012 Report Share Posted February 20, 2012 Isn't the AJS Stormer a mx bike, ? if so then it will be up the rev range. As Jon said easier starting and smoother running all helps... Quote Link to comment Share on other sites More sharing options...
andy.t Posted February 21, 2012 Author Report Share Posted February 21, 2012 Thanks for the replies so far. Could anybody let me know what they think... when a bike has static ignition at what point would the optimum efficiency be for the fixed setting on the points be?.If for example on my bike at 2mm btdc, if the best power would be at 5000rpm then I'm kind of thinking that the electronic ignition would probably give benefits lower down the range. Just trying to figure out when the bike was designed what made them come up with the 2mm btdc as the best setting and if I fitted electronic at what point would that improve things. I know you can play around with the static settings pending on the state of tune of the engine but would like to go electronic unless there's no great advantage.cheers for any more advice Quote Link to comment Share on other sites More sharing options...
dadof2 Posted February 21, 2012 Report Share Posted February 21, 2012 It will improve performance accross the range. A two stroke needs less advance at higher RPM (unlike a 4 stroke) I suggest you have a look at the PVL home page (difficult to find - I will post link tonight) and read two stroke tuning by A Graham Bell. I would be inclined to give the programable digital ignition serious consideration. Cheers Quote Link to comment Share on other sites More sharing options...
jon v8 Posted February 21, 2012 Report Share Posted February 21, 2012 It will improve performance accross the range. A two stroke needs less advance at higher RPM (unlike a 4 stroke) I suggest you have a look at the PVL home page (difficult to find - I will post link tonight) and read two stroke tuning by A Graham Bell. I would be inclined to give the programable digital ignition serious consideration. Cheers Thats a good point,and from memory the Electrex kits give 28 degrees of advance from the base setting.Be worth getting the specs before spending any money,or holing a piston etc. Quote Link to comment Share on other sites More sharing options...
bashplate Posted February 22, 2012 Report Share Posted February 22, 2012 Thanks for the replies so far. Could anybody let me know what they think... when a bike has static ignition at what point would the optimum efficiency be for the fixed setting on the points be?.If for example on my bike at 2mm btdc, if the best power would be at 5000rpm then I'm kind of thinking that the electronic ignition would probably give benefits lower down the range. Just trying to figure out when the bike was designed what made them come up with the 2mm btdc as the best setting and if I fitted electronic at what point would that improve things. I know you can play around with the static settings pending on the state of tune of the engine but would like to go electronic unless there's no great advantage.cheers for any more advice I think they give you the '2mm'btdc as an easy measurement, as it saves you setting up a degree disc to do it via crank degrees. Quote Link to comment Share on other sites More sharing options...
feetupfun Posted February 22, 2012 Report Share Posted February 22, 2012 I think they give you the '2mm'btdc as an easy measurement, as it saves you setting up a degree disc to do it via crank degrees. A fixed setting is a compromise to suit the whole RPM range. For trials bikes it is usually chosen to provide the best performance at low to mid RPM. On an MX or road race bike it is chosen to provide the best performance at the top end of the RPM range. An ignition that has the correct curve for a motor and application gets rid of the compromise Quote Link to comment Share on other sites More sharing options...
Johnny Posted February 22, 2012 Report Share Posted February 22, 2012 Get it fitted! My nephew raced a stormer. When he fitted electronic ignition it transformed the bike. Easier starting, crisper pick up and smoother running throughout the rev range. Quote Link to comment Share on other sites More sharing options...
mattylad Posted March 6, 2012 Report Share Posted March 6, 2012 I have used electronic ignition from different sources on my Yamahas TY175 and TY250 both were an inprovement in the reliability of tickover and drive from low rpm as well as the ability to rev hard. well worth the inverstment in my opinion. Quote Link to comment Share on other sites More sharing options...
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