asimo Posted June 16, 2014 Report Share Posted June 16, 2014 I have a sherco 2004 200 cc 2 stroke hi please help as I cannot get this bike to go I just bought it and have ridden it twice the third time it start revving fast then stoped and hasn't gone since I towed it today trying to clutch start it, no go. I always pulled out the plug and it is always dry? why is that? what makes the fuel go to the plug is it the carbie or the bottom end seals? is there a fuel pump any where? I have stripped the carby twice, cleaned the air filter , unhooked the kill switch. and new plug x 2 it has a spark the fuel is not getting to the spark olug does anyone know why? regard's asimo Quote Link to comment Share on other sites More sharing options...
shercolad Posted June 16, 2014 Report Share Posted June 16, 2014 May sound basic but are you getting fuel through the tap Sometimes need to go right back to the start and check one thing at a time Cheers malc Quote Link to comment Share on other sites More sharing options...
zerorev3rev4 Posted June 16, 2014 Report Share Posted June 16, 2014 as above is petrol tap in correct position ,, if yes and no flow they tend to have a filter on the tap inside the tank Quote Link to comment Share on other sites More sharing options...
asimo Posted June 17, 2014 Author Report Share Posted June 17, 2014 I have the same trouble only no fuel on the plug. what makes the fuel come to the plug? I have cleaned the filter in the tank and the fuel leaver is in the right position. I have fuel in the carby but not getting to the plug I cant work out why the plug is always dry. cheers asimo Quote Link to comment Share on other sites More sharing options...
copemech Posted June 17, 2014 Report Share Posted June 17, 2014 (edited) Perhaps the jets are plugged. Did you remove and clean the pilot and main jets? Is there fuel in the bowl? Is the banjo screen clean? Edited June 17, 2014 by copemech Quote Link to comment Share on other sites More sharing options...
zerorev3rev4 Posted June 17, 2014 Report Share Posted June 17, 2014 I have cleaned the filter in the tank and the fuel leaver is in the right position. I have fuel in the carby but not getting to the plug I cant work out why the plug is always dry. cheers asimo if theres fuel in carb and all jets are clear there must be a problem with compression or crank case pressure ie crank seals ,unless exhaust is blocked Quote Link to comment Share on other sites More sharing options...
asimo Posted June 17, 2014 Author Report Share Posted June 17, 2014 hi all, thanks for trying to help I have fuel in the carby bowl and the floats are in the right way I did a compression test and it was over 140psi the fuel hose is not squashed the fuel cock is open I have not checked the exhaust pipe to see if is blocked but I will, never thought of it. how would I check the crank case pressure thanks again I cant wait to ride it again Quote Link to comment Share on other sites More sharing options...
zerorev3rev4 Posted June 17, 2014 Report Share Posted June 17, 2014 Have you tried a drop of fuel in plug hole whats the story before this problem Quote Link to comment Share on other sites More sharing options...
zerorev3rev4 Posted June 18, 2014 Report Share Posted June 18, 2014 i mean drop of fuel in spark plug hole just a thimble full ,have you changed plug might just pay to try a new plug as might not be sparking under load Quote Link to comment Share on other sites More sharing options...
asimo Posted June 18, 2014 Author Report Share Posted June 18, 2014 this started when I bought it a month ago from Perth I got it home, rode it twice no problems then on the third ride it started and I put into gear and it revved out and stoped then I kick start it again, put it into gear to ride off and it would rev out and stop. this just kept on happening until it wouldn't start at all. the spark is pretty weak. the bike had not been used for 18 months before I got it. any ideas would be helpful cheers asimo ps I have change the plug 3 times, just cant figure it out Quote Link to comment Share on other sites More sharing options...
thats_a_five Posted June 18, 2014 Report Share Posted June 18, 2014 The symptom you describe "rev out and start" sounds exactly like a fuel supply problem. When 2 strokes get lean, they rev up quite high and then stop. Things that can cause this: 1) Plugged fuel tank vent. 2) Plugged or dirty fuel filter in tank 3) Plugged or dirty fuel tap in tank 4) Plugged or dirty in line fuel filter - if fitted 5) Plugged or dirty fuel inlet filter on carb 6) Sticking fuel float and needle in carb 7) Plugged or dirty jets or fuel passages in carb. 8) Bad fuel with water contamination You said that the spark looks weak but the plug is always dry so spark is not likely to be the problem. Clean everything again. Especially the carb. Complete strip and soak in solvent or ultrasonic cleaning. Blow through all the passages with compressed air - forward and reverse direction. Pass a thin copper wire through the jets. hold the jets up to light and you should be able to see light through the hole. Clean the starting circuit (choke). Check or replace all the rubber parts. Refill with new, known good gas. Let us know how you get on. Quote Link to comment Share on other sites More sharing options...
asimo Posted June 22, 2014 Author Report Share Posted June 22, 2014 hi guys thanks for the help but Sherco still doesn't go a friend dropped around and kicked it over as I held onto the spark plug and we couldn't get a spark he thinks its the stator, trigger and or the coil?????? at this point I am ready to try anything. if its the stator, where can I get a new updated one? cheers Asimo ps thanks to you guys I have learnt a lot about Sherco in a very short time. I spent a couple of hours building some easy sections with a front end loader. I hope to ride them one day. optimist Quote Link to comment Share on other sites More sharing options...
zerorev3rev4 Posted June 22, 2014 Report Share Posted June 22, 2014 are you in uk ? might pay to send stator cdi and coil altogether to be checked maybe west country windings Quote Link to comment Share on other sites More sharing options...
tony27 Posted June 23, 2014 Report Share Posted June 23, 2014 If you suspect the stator is the problem check the resistance values that splatshop list, it can be done in place with only the tank out & only takes a few minutes http://www.splatshop.co.uk/stator-repair.html If the values are close then the stator is unlikely to be the problem, I had a disappearing spark at 1 stage that turned out to be a cracked plug lead that I only found by chance when I saw an arc to the fan housing in the dark Quote Link to comment Share on other sites More sharing options...
t-shock 250 Posted June 23, 2014 Report Share Posted June 23, 2014 I would be looking at the stator, these fail often on sherco & beta machines of that era. Quote Link to comment Share on other sites More sharing options...
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