January 3, 200719 yr Hello I bought a 4RT about a month ago and it have run wonderful until last monday when after a gentle wash it refuses to start. I have in order: -Replaced the spark plug with a new one. Yes there are bright sparks. -Measured the ignition coil resistance (pg 6-3 in manual OK). -Measured the ignition pulse generator resistance (pg 6-4 OK). -Measured the PGM-FI system connector (pg 6-5 OK). -Connected the PGM-FI warning unit (pg 6-6). When I put the power switch on and run the check I first got a short blink then after about 2 seconds a long blink followed by two short blinks then again after a few seconds a long blink followed by two short blinks. Looking at pg 6-7 it is obvious that I got a code 12 which says: "Loose or poor contact on injector connector" or "open or short circuit in injector wire" or "faulty injector". I am not shure what the first short blink means, perhaps it is a code 1 (symptoms "poor idle) but it is not repeated and the problem is that the engine doesn
January 3, 200719 yr Ferrett Flasher will probably answer this one properly, but the reason it will not start is probably because the throttle is open some way. The best check I have found is to adjust the throttle cable so that there is some slack, make absolutely sure, the throttle butterfly is not open, then kick it over gently. There is NO history of 4RTs not starting, the chances of it being a electrical problem is remote, so before you start replacing injectors, go back to basics. Remember, no throttle. Let us know what happens.
January 3, 200719 yr O.K. this may sound stupid but, at the last trial my bike wouldn't start after I walked a section . After many kicks I talked to another 4rt owner and he said to put the throttle wide open and then let it go, then the next time you kick it hold the throttle open just ever so slightly. I didn't think it would work but it started first try He said it reset the computer or somthing, Mine has been fine since Just a thought.
January 3, 200719 yr my neighbour (sp?) had this problem with his bike . Any way after 2 hours or so i said open the throttle full and kick it throught slowly so he did. Then he kicked like you normly would and it went first time
January 3, 200719 yr Have you had the injector out and checked the 'o' ring is there, ok and hasn't let any water past? Unlikely but worth a look. Check the connector is seated properly and is clean and dry. Don
January 4, 200719 yr I will state the obvious (we have all done it im sure) is there petrol in the tank?? is there water in the petrol?? never heard of injector probs yet but you never know,good luck
January 5, 200719 yr Author I made the reset procedure described on pg 6-6 in the manual and.......it starts . Running a bit rough the first 15 seconds or so then cleaning up and back to normal idle. It seems to work OK now. I
January 11, 200719 yr Just reading through the above and myself and a friend have a similar problem with Repsol 07 models. The starting of the two bikes are a big problem after 1 1/2 laps of a normal trial - big problem to start. The strange thing is we have tried both std and ptb bodies with no change in the result ! We have also tried the idle sitution as well - no better. I have run my bike for 45 mins on idle stopped it and re-started it at home no problem. Have also run it completely out of fuel at home and re-started it no problem !! The problem arises only after some competition use. We have also tried the diagnostics test which has no faults along with new spark plugs !! Anyone got any ideas ??
January 11, 200719 yr Author As far as I know the best starting procedure is that to put the piston at TDC compression stroke and then with a long slow kick and no throttle at all try to start the engine, and I agree, it is more difficult to start the engine when it is hot. However, no starting problem for me during the last week . Carl
January 11, 200719 yr Believe it or not I've tried this as well !! Have even tried reducing 5% fuel for starting at below 1800rpm for starting purposes only. Has anyone tried using the 5 grade plugs which run hotter from what I'm told ??
January 11, 200719 yr Wonder if the air filter is blocking up in some way??? The only time I have had trouble starting mine was after cleaning and re-oiling the air filter after the 1st ride out/run in. With the air filter out the bike started and ran fine. As soon as I dropped it in with the flame guard the bike stopped and wouldn
January 11, 200719 yr Hi, regards the air filter I've already got the Jitsie fitted to mine as I run one on last years bike - seems to let them rev more ??!! Run the flame guard though as I know of another guy who caught the air filter on fire on a sherco when he removed the flame guard !!!! Sounds like the tools will be with me at the next trial - not really sure this is the true problem though ?? Any Ideas ??
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