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Post by graemestab on Aug 23, 2011 18:11:43 GMT 1
Hi Guys i desperatly need help otherwise an LC shall be scrapped. I am building a special the problem is it wont start. the engine was stripped cleaned inspected and rebuilt with new seals .all bearings seamed fine. carbs cleaned out and set to standard floats ajusted to stop overflowing. new rings as bores are good ( and still standard ) new gaskets ect I have a strong spark set timing as per manual carbs are defo clear done them 3 times now seams to be getting fuel ie the plugs smell of fuel. y wont it start any ideas . by the way i dont even get a pop as if it isn't firing but it defo is
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Post by graemestab on Aug 23, 2011 19:00:41 GMT 1
hi yes i have tried this and the carbs are fine
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Post by ivymike on Aug 23, 2011 19:40:09 GMT 1
might sound silly, check the carb slides are closing fully, if not then bike will just be flooding .
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Post by greenlandy on Aug 23, 2011 19:45:25 GMT 1
recheck your timing and jetting.
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Post by davey on Aug 23, 2011 19:48:56 GMT 1
now guys this really isnt a piss take ,try taking out the plugs and heating then up with a blow lamp,get thenm nice and hot but not glowing obviously, stick em back in and try. this has worked for me on many 2 strokes including very tempremental jet ski,s. not a guarrentee but its really worth a try mate
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Post by jollyr6 on Aug 23, 2011 20:30:15 GMT 1
id try what i did when i was a kid and still do get a small amount of petrol put in each plug hole put plugs back in if it fires work back from there it worked for me engine struck up first kick hope this helps crude but effective
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daveg
Drag-strip hero
ProClassic
Posts: 268
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Post by daveg on Aug 24, 2011 10:03:20 GMT 1
Do you have compression?
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Post by graemestab on Aug 24, 2011 17:14:50 GMT 1
sorry guys been away anyway jetting is all clear standard pilots 240 mains as its running chambers carb slides cut out facing the rear bowls are on the correct carbs. flooding may be an option as it stinks and petrol oil mix coming out of pipe flanges .i will check the slides. can you have to much oil as i mixed it strong for first start up.
Im mostly concerned that i dont even get a pop nothing it has compression feels about the same as my mates runner Baffled
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Post by gazilla on Aug 24, 2011 17:21:35 GMT 1
Switch off fuel spray inside carbs with WD40 or carb cleaner and kick it over.It should startif timing correct but not fuel.might help.
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Post by graemestab on Aug 24, 2011 17:42:55 GMT 1
Cheers for your help guys but still no joy just tried neat unleaded 97 ron in plug holes def got spark kicked over and guess what f**k ALL not even a pop how about easy start anyone tried it ..can timing be 180 degrees out dont see how on a 2 stroke .
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Post by drew1967 on Aug 24, 2011 18:12:13 GMT 1
I Think both plugs spark at same time. One to ignite fuel and other is wasted. So can't be 180' out.
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Post by stanlc7189 on Aug 24, 2011 23:20:14 GMT 1
This is really puzzling! If you have compression, have a correct fuel/air mixture and have a spark at the right time, it should go at least 'POP'! It might sound daft and possibly irrelevant, but I had a similar problem with my 2-stroke strimmer. Couldn't even get a pop out of it. Turns out I'd gone way overboard on the oil content in the pre-mix. Once I'd put fresh fuel in and the right oil/fuel ratio it went like a b*stard! Have you tried reducing the oil as I take it you're running pre-mix?
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Post by davey on Aug 25, 2011 1:15:27 GMT 1
did u try heating the plugs yet
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Post by graemestab on Aug 25, 2011 17:16:29 GMT 1
hi dave havent yet as i havent got a blow lamp but im thinking the oil is a bit strong tried carb cleaner and again nowt .its going in the skip soon piece of shit lol
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Post by greenlandy on Aug 25, 2011 19:43:46 GMT 1
Have you left the petrol tap on? it might be flooding the crankcases did this on mine had to take the exhausts off and took a couple of days to dry out. HTH Matt
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Post by wozzap on Aug 26, 2011 7:38:35 GMT 1
If you think that the timing is 180 deg out, then swap the plug caps over
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Post by drew1967 on Aug 26, 2011 14:40:54 GMT 1
Been trying to get mine started too. Loads of problems. Got it running on one side but popping and bogging down. Ended up stripping carbs re-setting everything. Floats were ok, air screws were way out and I blanked off the oil intake ports (don't know if it makes a difference) balanced everything up again. Think air screws were main problem. Might be worth checking.
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Post by ivymike on Aug 26, 2011 21:57:53 GMT 1
sounds like if you have mixed it strong that the crank cases are full of oil/ fuel. as other man says warm plugs up. you can do them on the gas stove then run outside and put them in. plus make sure the needle is in the right clip. warming plugs defo works.
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higgsy
Thrash Merchant
Posts: 458
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Post by higgsy on Aug 26, 2011 23:13:53 GMT 1
Take the plugs out, push it round the block in gear, this will empty the crancase of any remaining fuel mixture, spray some easy start or WD40 down each bore, put clean plugs back in, bump start down road with no choke. It should start. It sounds like flooded engine to me.
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Post by ivymike on Aug 28, 2011 18:03:24 GMT 1
have you managed to start it yet? another problem could be if your crank seal is faulty, thus dragging in gear oil when you try to start it
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Post by drew1967 on Aug 29, 2011 19:49:02 GMT 1
Did you sort it Graeme. I seem to have same problem now. Was running now not a pop. Cleaned the pilot jets and emulsion tubes. They were really blocked and crudded up. Ran a bit before now nothing.
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Post by wiseric on Aug 29, 2011 20:47:53 GMT 1
I remember that problem well. I ended up getting my bike towed for about 1/2 mile (something I would never think of doing today but I was young and foolish back then, now I'm just foolish ;D). It started firing and making horrid poping and banging noises. The next 1/2 mile it finally started to run but smoked horrendously and would not rev for a while, I thought a crank seal had gone but it came right in the end and all because I had left the bike standing with the tap on for a week. ran fine after that.
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Post by graemestab on Sept 1, 2011 14:32:00 GMT 1
right Guys a big thank you for all help and suggestions. i have now sussed it and when corrected started first kick it is no longer a piece of shit but my baby again. i'm sure im the only total t**t on the planet to have done this but for ref and future problems REMEMBER TO DO THE HEAD BOLTS UP WITH A SPANNER i did them hand tight then forgot to torque down hence crank cases full of rad water ....what a prick
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Post by rabbit57 on Sept 1, 2011 17:39:39 GMT 1
Sure we've all done somthing dumb with a bike I know I have in the past.Glad your up and running again.Bob.
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Post by gazilla on Sept 1, 2011 21:56:03 GMT 1
Would suggest checking all nuts and bolts as you memory may be going.;-)
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Post by gazilla on Sept 1, 2011 21:56:14 GMT 1
Would suggest checking all nuts and bolts as you memory may be going.;-)
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Post by bare on Sept 3, 2011 16:32:30 GMT 1
So You figure it's been Full of rad water for what? 2 weeks !! IF... that's even close to accurate.. it's now time for a Complete and Total rebuild. there's every chance the water caused rust spots in the crank bearings... in the very least. Fix it now or fix it later , at twice (triple?) the cost. These engines are fragile and simply don't suffer foolish well at all.
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Post by wiseric on Sept 7, 2011 0:04:53 GMT 1
Not sure there will be any damage to the crank. If the water was mixed with coolant it should have helped prevent corrosion. Plus there would have been a mixture of fuel and 2 stroke oil in there as well so there is a good chance no damage has been done. I would run it first and see how it goes before doing an expensive rebuild.
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Post by billy on Sept 7, 2011 1:17:45 GMT 1
Not sure there will be any damage to the crank. If the water was mixed with coolant it should have helped prevent corrosion. Plus there would have been a mixture of fuel and 2 stroke oil in there as well so there is a good chance no damage has been done. I would run it first and see how it goes before doing an expensive rebuild. I'd 2nd that mate, I wouldn't be too worried tbh. He could just ride the bike and it'll eventually clear away the coolant.
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