Please Help Exciter bogs down after 10 minutes ?

V

Vmax540

New member
My Exciter after starting cold seems to run good but, after 10 minutes it bogs down and progressively gets to the point where it will not even move under it's own power. It will continue to idle but, won't even rev up beyond 5000 Rpms with the track lifted. This engine has a fresh top to bottom rebuild with seals, gaskets, pistons and rings. The stator coils and ignition coils check within specs. before and after it bogs. There is still 130 Lbs. of compression in both cylinders after it bogs down. The carbs are clean with all new gas lines and filter. If you let it cool down it will run for another 10 minutes. I have the choke adjusters backed off the whole way to make sure they are seating (I pull it from a warm garage). The plugs appear wet when pulled and how can I read them since, I only start to get it to operating temp. when it bogs ? Setting it to half choke doesn't help. I have bled the cooling system and it is circulating since the exchangers get warm ? Any ideas..... ? (CDI ?) Thanks Chuck
 
Last edited:

Check those seals. That's a typical indication of a bad one but could be something else. Check the coils/wires/cap with ohm meter when cold and then when hot and see if it is there. Temp increase will change the way a coil can fire. CDIs are almost always work or no work....Blue
 
Shot in the dark here,When you did the carbs what did you do with the vent lines?I only ask this because I had a buddy insist that he put everything back the way it was and low and behold he had connected the vent lines together hence creating a fuel flow problem.Check your vent lines to see if they are clogged or improperly connected to something there not supposed to be connected to.
 
that does sound like a crank seal..I got an old cat that will run great for the first few, then it eventually starts to run horible, followed by not running at all..LOL
anyway, I found it was a crank seal.
 
it could still be the cdi unit...have had a couple over the years loose their timing curve...they start @ 10 D' btdc should and advance to about 37 D'btdc right at around engagement speed(3500/4000) ..otherwise they spark enough to run but thats it.... easy way to check it...mark your clutch in a few spots with white out and find one of the marks with a timing gun ..see if it moves as you increase rev..
 
It Runs....
icon_smile.gif
! ! ! Thanks for all the help ! I bought it with a bad crank so, I never ran it until after the rebuild. And altough, I cleaned the carbs the floats were set at not quite 17mm's and the specs are 17.1 to 19.1mm so, I set them at a strong 18mm and no more bog ! I do have the air screws out 1 turn futher than the spec's. call for so, do I need to drop the pilot jets a size down ? Thanks Again everyone !
 
You must log in or register to reply here.


Back
Top