squid_on_a_300 Posted October 26, 2015 Report Share Posted October 26, 2015 Ok...get this...a little over 1 year ago at a trial with a long loop my 03 300 Pro was acting up..Near the end of the 1st loop it started to sound kind of "dull" then wouldnt take any throttle, bogged out like it ran out of gas and it would not start. I pulled the plug and it was a nice light brown and dry...Figured i had a fuel problem somewhere. DNF'd the event packed up and drove home. Cleaned the entire fuel system. Bike started up and ran great since...Today at the same event, going between the SAME TWO SECTIONS as 1 year ago, the bike did the same exact thing. Deja vu all over again!...Pushed it back to the truck yanked the plug. Nice and tan and dry. Checked for spark...very weak and only on about every other or every third rotation. Got home, checked for spark..nice blue spark. Put the plug in and the bike started right up.... Likely culprit, HT coil or pick up coil?...Im figuring the HT but how can I bench test the HT coil for failure when hot? 2003 300 pro with Kokusan ignition... thanks in advance Squid... Quote Link to comment Share on other sites More sharing options...
lineaway Posted October 26, 2015 Report Share Posted October 26, 2015 So you did not ride the bike for a year? Quote Link to comment Share on other sites More sharing options...
squid_on_a_300 Posted October 26, 2015 Author Report Share Posted October 26, 2015 No...i rode it all season...the problems happend 1 year apart at the same trial on the same section transfer...bike ran fine for 1 year... Quote Link to comment Share on other sites More sharing options...
crazybond700 Posted October 26, 2015 Report Share Posted October 26, 2015 (edited) Bike didnt overheat? Bad coil is possible but usually happens more often then (when a little hot +- 15min or so) Maybe the carb was run empty? Edited October 26, 2015 by crazybond700 Quote Link to comment Share on other sites More sharing options...
dadof2 Posted October 26, 2015 Report Share Posted October 26, 2015 You can't properly bench test a HT coil without proper gear. Warm your bike up at an Auto diagnostics centre and they will be able to check the coil with a clip on tester in a few seconds. Its just a matter of clipping a sensor onto the HT lead or holding a COP probe against the coil. Quote Link to comment Share on other sites More sharing options...
crazybond700 Posted October 26, 2015 Report Share Posted October 26, 2015 There are special apperatus for measuring coils, it has a sparky thingy in it, I use to use one at my old job for mopeds, where they often got broken somehow. Only works if the cdi and coil are loose parts. Quote Link to comment Share on other sites More sharing options...
lineaway Posted October 27, 2015 Report Share Posted October 27, 2015 Just don`t ride that trials next year! Quote Link to comment Share on other sites More sharing options...
lineaway Posted October 27, 2015 Report Share Posted October 27, 2015 http://www.trialscentral.com/forums/topic/57404-fueling-problem/#entry409090 Quote Link to comment Share on other sites More sharing options...
squid_on_a_300 Posted October 27, 2015 Author Report Share Posted October 27, 2015 (edited) Lineaway I thought the same thing...I told one of the guys that I'll check at that event next year! I thought again a fuel issue but the weak spark points to the coil? I'll spring a $100.00 for a new one and see if that thakes care of the issue next year... Edited October 27, 2015 by squid_on_a_300 Quote Link to comment Share on other sites More sharing options...
cbutler Posted October 27, 2015 Report Share Posted October 27, 2015 What about the stater? My buddy's Scorpa would run fine until it got hot ended up the stater was going out. Quote Link to comment Share on other sites More sharing options...
lineaway Posted October 28, 2015 Report Share Posted October 28, 2015 Electric issues don`t usually take a year off good luck on the search. Quote Link to comment Share on other sites More sharing options...
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