manz Posted November 20, 2004 Report Share Posted November 20, 2004 Just got hold of an 2001 rev3 270. It's been ridden wery little, and otherwise in good condition. It has been standing in an warm garage for about an year, been run twice during that time. We emptied the tank, changed gearbox oils (previous owner had been running something wery thik, clutch was dont freeing at all as cold) to the same elf 740 i use in the montesa. We also changed spark plugs, cleaned filter, and cleaned the carb.... Then we got to start it... =) IT RUNS LIKE SH*T. Pardon my french. At idle, it runs quite ok. Open the throttle abit (very little), still runns ok. Give it a bigger blip on the throttle... heavy misfire, detonation. Checked float level, which was ok. Raised needle. Still same. Noticed that when it gets warm, and we stop it, it fouls the plug. Even if its not wet. We dont have a magneto puller tool so we werent sure that it was ok. Then we hooked it up with a storbelight, put "piston top" position markers on the casing, and on the flywheel. At idle, it fires about 2cm from top (on the flywheel), give it a little more, it goes earlier about Quote Link to comment Share on other sites More sharing options...
colly Posted November 20, 2004 Report Share Posted November 20, 2004 is your timing ok? mine was like this on my gg. the woodruff key on the fly wheel sheared off. Quote Link to comment Share on other sites More sharing options...
marky g Posted November 20, 2004 Report Share Posted November 20, 2004 Didn't the early ones have stator plate problems? Quote Link to comment Share on other sites More sharing options...
feetupfun Posted November 20, 2004 Report Share Posted November 20, 2004 Well done checking with a strobe. Yes whet you are probably seeing is what MarkyG has suggested. To prove to yourself that it is the stator before you shell out for a new one, can you swap just the rotor with another Rev3 to see if the problem goes away? About half the early Rev3s in my club have suffered this failure so we are geting pretty good at diagnosing it now. Quote Link to comment Share on other sites More sharing options...
manz Posted November 21, 2004 Author Report Share Posted November 21, 2004 Hmm, havent checked the stator plate.. but now when you guys mention it... Althou i need to get an magneto puller. So you are sure it isnt the cdi box? Also noted compared to my montesa that the spark is weak. I fail to see it would be the woodruff key, as the magneto sits _firmly_ in place and timing at idle is ok. Quote Link to comment Share on other sites More sharing options...
feetupfun Posted November 22, 2004 Report Share Posted November 22, 2004 Hmm, havent checked the stator plate.. but now when you guys mention it... Althou i need to get an magneto puller. So you are sure it isnt the cdi box? Also noted compared to my montesa that the spark is weak. I fail to see it would be the woodruff key, as the magneto sits _firmly_ in place and timing at idle is ok. It may indeed be the CDI box. If you have another Rev 3 there to use a test parts why don't you swap the CDI box first if you don't have a flywheel puller yet? London to a brick it's the stator coil though. Yes if the timing is right at idle it's not a sheared flywheel locating key. Quote Link to comment Share on other sites More sharing options...
manz Posted December 4, 2004 Author Report Share Posted December 4, 2004 Well, got a new stator plate. And a puller. Woodruff key was in place, we exchanged the stator plate for a new one (around 120 Quote Link to comment Share on other sites More sharing options...
marky g Posted December 4, 2004 Report Share Posted December 4, 2004 try a new Plug cap..cheap and cheerful Quote Link to comment Share on other sites More sharing options...
manz Posted December 4, 2004 Author Report Share Posted December 4, 2004 yeah well, tried that already. (thank god). Wouldnt be nice to notice that you've spent 230€ on parts which didnt help just to notice it was the plug cap the cdi box is around 110€.... Quote Link to comment Share on other sites More sharing options...
manz Posted December 16, 2004 Author Report Share Posted December 16, 2004 Well. I hope you dont think i change a 200 Quote Link to comment Share on other sites More sharing options...
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