DillHD Posted May 23, 2014 Share Posted May 23, 2014 I posted a thread a while back about my bike that would not start after couple week of not being run & I also posted the bike started and was getting "healthier" this was not the case, far from it.Ever since my last post about this bike the bike has not started AT ALL.When you kick the bike the dash lights up which indicates the bike engine is on but within milliseconds it goes offIf you use the electric start the bike try's to start but the dash doesn't light up.Things iv tried:cleaned carb (three times)cleaned jets2 new spark plugsfresh petrolcleaned exhaustdifferent wiring loompetrol is getting to the carbBump starting it, a little more luck here, when bumpstarting and the clutch is released the bike somewhat turns on but it sounds like its trying its VERY hardest to cut its self out as soon as you let the throttle of or the bike stops rolling the bike will cut out.Iv even took the side of the engine case of and got a cordless(drill) on the nut and the bike wont start(i know VERY stupid but It was my completely last resort) While doing this It was at 3000 revs and when the cordless stopped so did the bike.It's like im trying to start a bike with the Killswitch on, only... it doesn't have one.I cannot take this bike to the garage as its miles away and don't fancy pushing it that far, I don't even have anything I could transport the bike in, nor do I have any mates to check it out as they're all car guys ;(Iv completely had it with this bike and so close to selling it, ANY help AT ALL is 110% appreciated. I miss my bike . Quote Link to comment Share on other sites More sharing options...
Mr Fro Posted May 23, 2014 Share Posted May 23, 2014 Any chance you can link to the original thread so we don't all repeat the same stuff again? Quote Link to comment Share on other sites More sharing options...
DillHD Posted May 23, 2014 Author Share Posted May 23, 2014 Any chance you can link to the original thread so we don't all repeat the same stuff again? Sure, no problem. here: viewtopic.php?f=5&t=52597 Quote Link to comment Share on other sites More sharing options...
Mr Fro Posted May 23, 2014 Share Posted May 23, 2014 Cheers buddy. I don't think you said what bike it is...So what happened with it's recuperation? Loads of white smoke and then what? Quote Link to comment Share on other sites More sharing options...
Adam Posted May 23, 2014 Share Posted May 23, 2014 Just read the previous thread and no one mentioned the battery... What condition is that in? Check the voltage of it with the bike off and then on if you can keep it running or get it running! Quote Link to comment Share on other sites More sharing options...
DillHD Posted May 23, 2014 Author Share Posted May 23, 2014 Cheers buddy. I don't think you said what bike it is...So what happened with it's recuperation? Loads of white smoke and then what? The bike is a 2012 SM50, as for the recuperation there was quite alot of white smoke but after some idleing it seemed to have gone down abit but not by much, if I turned the bike off It would start almost instantly off the electric starter, so I thought hey its fixed now! The next day It didn't start and hasnt since. The odd morning when I try it, it sometimes stays on for 1 second (doesn't seem much but you can tell it idled nice for that 1-2 seconds rather than instantly cutting out (literally)) but then It wont start again for the rest of the day.Honestly, to me, this bike is a mystery. Quote Link to comment Share on other sites More sharing options...
DillHD Posted May 23, 2014 Author Share Posted May 23, 2014 Just read the previous thread and no one mentioned the battery... What condition is that in? Check the voltage of it with the bike off and then on if you can keep it running or get it running! The battery is in OK condition, not the best if im honest but it holds it's charge after trying the electric starter for some 20-30 mins it starts to go dead and needs to be charged but I cant see that being the problem. Quote Link to comment Share on other sites More sharing options...
rennie Posted May 24, 2014 Share Posted May 24, 2014 I know nothing at all about sm50,s!But! It can't be that complicated surely.Is it a 4 stroke? or a 2 stroke?Take spark plug out, hold against engine, crank over are you getting a good spark?(try not to give yourself a shock!)has it got an air filter? if so is it clean/clear?Are you sure that fuel is getting through?If you have fuel/air/spark it should go! Quote Link to comment Share on other sites More sharing options...
DillHD Posted May 24, 2014 Author Share Posted May 24, 2014 It's a 2 stroke and iv put the spark plug to the engine before and it's giving a good spark, it's deffiently getting air and fuel. It's a mystery Quote Link to comment Share on other sites More sharing options...
eastanglianbiker Posted May 24, 2014 Share Posted May 24, 2014 its starting to sound like the crankshaft seals might of gone and allowing compression to escape out into crank cases if you take the case off the left hand side of the engine t hat has the alternator in it does it smell of fresh petrol type smell?? this was a common fault on 2 stroke suzukis back in the days of the gp100 and such like they would suddenly blow the casing off when running due to fuel build up in casin then going bang and taking said casing off down the road Quote Link to comment Share on other sites More sharing options...
rennie Posted May 24, 2014 Share Posted May 24, 2014 ok then if it's a 2 stroke I haven't heard you mention2 stroke oil! Is it a seperate tank for the oil?or in with the fuel? Quote Link to comment Share on other sites More sharing options...
DillHD Posted May 24, 2014 Author Share Posted May 24, 2014 ok then if it's a 2 stroke I haven't heard you mention2 stroke oil! Is it a seperate tank for the oil?or in with the fuel? The 2stroke oil is in a separate tank Quote Link to comment Share on other sites More sharing options...
DillHD Posted May 24, 2014 Author Share Posted May 24, 2014 [UPDATE] So today I finally managed to get it to a friends garage and was running all different tests on the bike, electrics, compression etc... The bike was in perfect shape in those departments. But then he took the spark plug off and tried starting it and it sounded flooded... Badly so he leaves it open lets some evaparate for the few hours it was not messed, when we come back to the bike it started to "cough" somewhat, sounding much much much more like a bike. Then to "fasten up" the de-flooding we put a blowtorch over the where the sparkplug would be and tried starting it and flames came right out indicating there is quite some petrol/oil in there so after a few attemps of this and using compressed air machine we got most of the petrol/oil out we heated the sparkplug put it in and waala it started, not straight away but eventually. So as of right now the bike starts BUT I have another problem *sighh* the bikes throttle barely does anything nor does the screws on the carb (we were adjusting the carb screws to set the idle correct). When you move the throttle cable the bike will climb revs on its own which is not seeming so easy to fix as the cable is not trapped on anything the cables are lubed and the throttle "handle" isnt getting stuck, when the actual throttle is pulled its doing very little, but what can I say at least the bike actually starts now heh?Sorry for the wall of text. Quote Link to comment Share on other sites More sharing options...
Adam Posted May 25, 2014 Share Posted May 25, 2014 Sounds like the throttle cable is too tight. Rather you thN me with the blow torch in the engine!!! Quote Link to comment Share on other sites More sharing options...
DillHD Posted May 25, 2014 Author Share Posted May 25, 2014 Sounds like the throttle cable is too tight. Rather you thN me with the blow torch in the engine!!! I have removed the air filter so I could see the pin and when you pull the throttle the pin moves perfectly, just like it should. Im so confused. When the bike wasnt running (weeks ago) I cleaned the jets from the carb, is it possible for me to screw them in too much or too less? And this is causing it?Also if I pull the throttle back alot the bike bogs down and cuts out, maybe this is something key Quote Link to comment Share on other sites More sharing options...
acting_strange Posted May 25, 2014 Share Posted May 25, 2014 Sounds like the throttle cable is too tight. Rather you thN me with the blow torch in the engine!!! I have removed the air filter so I could see the pin and when you pull the throttle the pin moves perfectly, just like it should. Im so confused. When the bike wasnt running (weeks ago) I cleaned the jets from the carb, is it possible for me to screw them in too much or too less? And this is causing it?Also if I pull the throttle back alot the bike bogs down and cuts out, maybe this is something key Have you tried running the bike without the air filter and see if that makes a difference.. Quote Link to comment Share on other sites More sharing options...
DillHD Posted May 25, 2014 Author Share Posted May 25, 2014 Sounds like the throttle cable is too tight. Rather you thN me with the blow torch in the engine!!! I have removed the air filter so I could see the pin and when you pull the throttle the pin moves perfectly, just like it should. Im so confused. When the bike wasnt running (weeks ago) I cleaned the jets from the carb, is it possible for me to screw them in too much or too less? And this is causing it?Also if I pull the throttle back alot the bike bogs down and cuts out, maybe this is something key Have you tried running the bike without the air filter and see if that makes a difference.. Yes, makes no difference. Also now, the bike is starting to rev up on its own and then cuts out around 22 - 2400 Quote Link to comment Share on other sites More sharing options...
eastanglianbiker Posted May 25, 2014 Share Posted May 25, 2014 did you remove the float bowl to clean the jets for the carb and while doing so did you happen to touch the float or bend the centre bit that has a brass shut off valve hanging on it that goes into fuel inlet and closes off the fuel once the required amount is in the float bowl,if you have altered that you might be either starving it of petrol (not letting enough into float bowl) or flooding it (allowing to much petrol into float bowl) Quote Link to comment Share on other sites More sharing options...
DillHD Posted May 25, 2014 Author Share Posted May 25, 2014 I removed the filter to double check, and actually the bike runs better with the filter off and actually revs. But if I take the pipe leading to the filter box off the bike wont start. Quote Link to comment Share on other sites More sharing options...
DillHD Posted May 25, 2014 Author Share Posted May 25, 2014 did you remove the float bowl to clean the jets for the carb and while doing so did you happen to touch the float or bend the centre bit that has a brass shut off valve hanging on it that goes into fuel inlet and closes off the fuel once the required amount is in the float bowl,if you have altered that you might be either starving it of petrol (not letting enough into float bowl) or flooding it (allowing to much petrol into float bowl) I have actually bent the float but I bent it back (i barely even bent it, i bent it like quater of 1mm). What directions could you give me to ensure my float is set correct? Extra info: The throttle is delayed quite a lot when you first pull it back but as soon as it "gets going" at high rpm theres no delay. Also the bike will bog down if I rev it to quick, If I leave the bike running for 2 mins it will rev very high then slowly bog down and if its lucky just barely stay alive 9/10 it bogs down and cuts out.I honestly think it is the carb, more specifically the fuel going into the carb but I just cant figure a way to fix it.EDIT: I just remembered I "bent" the float on the carb weeks ago and since then I have had the bike running after that and it revved fine, so it cant be that.. im baffled Quote Link to comment Share on other sites More sharing options...
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