number6 Posted October 21, 2013 Report Share Posted October 21, 2013 I have having trouble to get a spark on a Jawa laydown I have cleaned all earthing points and checked all wiring. I am using a selecta red box and ignition from my running engine. The only thing I have not tried is the dyno (silver thing that sits in middle of red ignition behind case) But do I need a pulley to get them off or can I make something to use? Thanks Quote Link to comment Share on other sites More sharing options...
Vince Posted October 21, 2013 Report Share Posted October 21, 2013 Two bolts that go al the way through the threaded holes in the rotor will do the job. Quote Link to comment Share on other sites More sharing options...
number6 Posted October 21, 2013 Author Report Share Posted October 21, 2013 Brilliant thank you Vince, I have changed that so got my complete ignition and spark plug from my working bike and there is still no spark! any ideas on what could be wrong? Thanks Quote Link to comment Share on other sites More sharing options...
rainman Posted October 21, 2013 Report Share Posted October 21, 2013 Faulty cut out? Quote Link to comment Share on other sites More sharing options...
number6 Posted October 21, 2013 Author Report Share Posted October 21, 2013 ok ill try that thanks Quote Link to comment Share on other sites More sharing options...
number6 Posted October 27, 2013 Author Report Share Posted October 27, 2013 tried cut out still nothing. Could my timing be out? does anyone have the disc and tools needed to set up timing? also a brief run through of how to do it thanks Quote Link to comment Share on other sites More sharing options...
rainman Posted October 27, 2013 Report Share Posted October 27, 2013 Where are you based? Quote Link to comment Share on other sites More sharing options...
number6 Posted October 28, 2013 Author Report Share Posted October 28, 2013 Surrey Quote Link to comment Share on other sites More sharing options...
Great Central Posted October 28, 2013 Report Share Posted October 28, 2013 tried cut out still nothing. Could my timing be out? does anyone have the disc and tools needed to set up timing? also a brief run through of how to do it thanks If the timing is out, you will still get a spark. Have you taken the cutout out of the sytem altogether and just tried it with the coil and stator? You make no mention of the spark plug but I assume you have tried another. I know that you said you cleaned all the earth connections but is the earth wire ok? When you swapped the coil did you swap the plug cap with it? Sorry if these questions seem pointless but if you have changed the coil and stator from your other working bike, and checked teh cutout it should work. Quote Link to comment Share on other sites More sharing options...
number6 Posted October 28, 2013 Author Report Share Posted October 28, 2013 hello thanks I have tried every thing apart from trying to run without a cut out. Its just this bike was fully running and ok but I changed engine and nothing else changed i.e red box & cut out then I didn't get a spark so I took the plug, red ignition and dyno out of my running engine and put into this engine, still no spark. I am really confused that's why I thought if timing was out then I would not get a spark! Maybe engine just needs to hit the scrap heap!!! Quote Link to comment Share on other sites More sharing options...
Great Central Posted October 28, 2013 Report Share Posted October 28, 2013 hello thanks I have tried every thing apart from trying to run without a cut out. Its just this bike was fully running and ok but I changed engine and nothing else changed i.e red box & cut out then I didn't get a spark so I took the plug, red ignition and dyno out of my running engine and put into this engine, still no spark. I am really confused that's why I thought if timing was out then I would not get a spark! Maybe engine just needs to hit the scrap heap!!! The engine condition has nothing to do with the spark. I hope that when you are saying there is no spark you are meaning no spark at the plug and not that the engine doesn't run. In effect, there are only 4 components to the system: the spark plug, the cutout, the coil, and the stator/rotor. You have changed the coil and the rotor/stator from a good bike that runs so they are ok. Can you confirm that you changed the rotor as well as the stator? You have changed the plug for a good one so that is ok. That only leaves the cutout, so connect up the system without it in the loop and see what happens, or swap it from the bike that does work.Hope this helps. Quote Link to comment Share on other sites More sharing options...
number6 Posted October 29, 2013 Author Report Share Posted October 29, 2013 I will try by passing the cut out every thing is off my running bike even the cut out! It is really strange. From my running bike I am using the same chassis and following parts from my running engine, Cut out Red Ignition box Spark Plug Spark plug Cap Red ignition (behind casing) the Silver cylinder magnet dyno that sits on shaft in middle of red ignition. All earthing points have been cleaned as well. So I am really stumped as everything has been used from my running bike onto this engine. Quote Link to comment Share on other sites More sharing options...
speedibee Posted October 29, 2013 Report Share Posted October 29, 2013 I will try by passing the cut out every thing is off my running bike even the cut out! It is really strange. From my running bike I am using the same chassis and following parts from my running engine, Cut out Red Ignition box Spark Plug Spark plug Cap Red ignition (behind casing) the Silver cylinder magnet dyno that sits on shaft in middle of red ignition. All earthing points have been cleaned as well. So I am really stumped as everything has been used from my running bike onto this engine. How are you testing for a spark ? Quote Link to comment Share on other sites More sharing options...
number6 Posted October 29, 2013 Author Report Share Posted October 29, 2013 having plug in plug cap and wife holding it against the engine plate whilst I spin the back wheel Quote Link to comment Share on other sites More sharing options...
speedibee Posted October 30, 2013 Report Share Posted October 30, 2013 having plug in plug cap and wife holding it against the engine plate whilst I spin the back wheel It's probably sparking , it's really difficult to turn the wheel fast enough and see the spark at the same time . heres a couple of suggestions for you , 1. assemble the known good ignition and try starting the bike , 2, get your wife to hold the plug not the cap and see if she yelps . . whats your skill level with speedway engines on a scale of 1 to 10 , because there is another way but you would need to be at least 6 . Quote Link to comment Share on other sites More sharing options...
number6 Posted October 30, 2013 Author Report Share Posted October 30, 2013 Ill go for option 2 haha!! and I know a bit but still trying to teach myself so I would say a 4 have stripped down engine before but that was with another rider. Quote Link to comment Share on other sites More sharing options...
speedibee Posted October 30, 2013 Report Share Posted October 30, 2013 Ill go for option 2 haha!! and I know a bit but still trying to teach myself so I would say a 4 have stripped down engine before but that was with another rider. Ok lets try this third option . only if you feel confident though .. mark the centre rotor against the outside with a dot of tippex . ( so you dont put the case back !80 out ) remove the case that the electrics are bolted to with the electrics still in place , take the coil off and bolt it though one of the screw holes to the case , stick the case in the vice , and spin the rotor with an electric drill , hold the plug against the case and you should see sparks , (word of advice here , dont take the plug away from the case until the rotor has completely stopped or you get option 2 ) hope you can understand these instructions if anything is not clear , just ask Quote Link to comment Share on other sites More sharing options...
Triple.H. Posted October 31, 2013 Report Share Posted October 31, 2013 having plug in plug cap and wife holding it against the engine plate whilst I spin the back wheelOne thing i do know is when it comes to mechanics wives and girlfriends generally dont cut the mustard though far easier on the eye than there male counterparts. Quote Link to comment Share on other sites More sharing options...
dsracing21 Posted December 1, 2013 Report Share Posted December 1, 2013 Seems to me the selecta box has gone, the red version is rubbish for jawas, I have scrapped about 4 and 1 of them is new, you can get them repaired for £50 red boxes work 1 day and goes the next day. , disconnect the cut out completely, wack in a new plug and get your selecta re-wired. Then it should fire up no probs. Quote Link to comment Share on other sites More sharing options...
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