Overboost Posted September 26, 2009 Report Posted September 26, 2009 ok, looking for ideas as to WTF happened today... first the problem: bike ran excellent, took it out, warmed it up as usual, raced my friends DS 650 (as usual) stomped his ass (as usual) went for a trail ride, within 2 miles, bike started to run like shit, ran but wouldnt go over 40 or so, got out 6 miles, came back in, did some checking and this is what I found.... the cylinder on the left side runs but not as it should, pipe is warm and the right side is so hot you cant touch the pipe, you can lay your hand on the left and it is only just above warm., it blows lots of smoke out the right side when you get on it hard, idles just fine.. this is what I did... pulled the plugs and changed them, swapped plug wires, changed coil pack, took apart carb, set float, cleaned filter, pulled reed, exhaust pipe, compression check (147PSI) removed flywheel checked stator. all had either no effect or did not appear to be anything wrong with these things. what chaps my ass is, it ran fine then shit all of a sudden on one side only...idles fine but wont pull up top or rev over 7500 or so..... WTF,....,^*&*(&^&%%$$%$&^*(^$ any ideas? Quote
locogato11283 Posted September 26, 2009 Report Posted September 26, 2009 i know you say you swapped plug wires, but im wondering if you didnt foul that plug. a plug can foul so that it wont run worth a shit on the top end, but still idle and run alright at lower rpm's. id try a couple new plugs and see if that might be it. itll be a quick, cheap test.. Quote
Overboost Posted September 26, 2009 Author Report Posted September 26, 2009 I usually carry enough plugs to stock an auto zone store... I put in 3 different plugs into that cylinder and it still did the same thing....that is why I am so puzzled. each one comes back out slightly wet, not "fouled" it fires and the pipe gets hot but the harder you ride it, the colder the pipe gets. if you let it idle, they stay about even, when you give it hell, it cools down...like spark not firing Quote
Overboost Posted September 27, 2009 Author Report Posted September 27, 2009 any other thoughts? Quote
quikshee Posted September 27, 2009 Report Posted September 27, 2009 Just a thought, did you swap and try all those things at once? or each one at a time? To me it sounds like your getting weak to no spark on that cylinder. Quote
Overboost Posted September 27, 2009 Author Report Posted September 27, 2009 I tried each one individual. starting with swapping in new plugs. that was my first thought is it sucked a plug, then I went to the coil, then carb, reed. still ran the same, so I brought it home and tested compression being that was my next thought was I smoked a cylinder. it sucked being I only got to ride it 2 good miles yesterday. at least I stomped the DS first thing when we got them unloaded. I have the stator cover and flywheel off now, think I am going to try swapping the stator. will the flywheel mags go bad? being that it is keyed, that cylinder will fire off the same mag all the time so if that is crap, seems to reason that it would not fire on that one cylinder reguardless of coil wire position and swapping sides wont change that. just an idea before I change flywheels. Quote
99bansheeboy Posted September 27, 2009 Report Posted September 27, 2009 maybe the carb is screwed up like a plugged jet or something Quote
Overboost Posted September 27, 2009 Author Report Posted September 27, 2009 maybe the carb is screwed up like a plugged jet or something carb is getting changed now. I tore it apart and didnt see anything, but that dont mean something is not lodged in where you cant see it, the main jet port and needle is clear, so I am just going to replace the entire thing and see what happens. Quote
Overboost Posted September 27, 2009 Author Report Posted September 27, 2009 exhaust pipe is wet at the exit.... changed carbs, still does it. could I have sucked a head gasket? I have a NOSS O-ring head on there, maybe it blew a ring out and is sucking in coolant because the smoke is not black smoke its kinda white like coolant, I just ASS-umed it was overly rich with oil. Quote
rubberneck Posted September 28, 2009 Report Posted September 28, 2009 Very possible you are leaking coolant. Do you see bubbles in the radiator if you pull the cap. Also you stated the right side is moking a lot, if it is blue it could be oil, maybe you blew the right crank seal Quote
Overboost Posted September 28, 2009 Author Report Posted September 28, 2009 Very possible you are leaking coolant. Do you see bubbles in the radiator if you pull the cap. Also you stated the right side is moking a lot, if it is blue it could be oil, maybe you blew the right crank seal it is not low on oil in the trans so I am going to guess a no on that, the smoke is more white than anything. pulled the head and the left dome is washed out, the right has nice carbon on the dome and the left is shiney clean, piston was wet, plug was wet. dont smell like oil or gas, just smells wet, I run dexcool for coolant so that is probly the problem and why it dont smell like antifreeze. I am replacing the O-rings and putting in some engine ice, hope this solves the problem. Quote
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