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  #31  
Old 06-03-2013
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Great info thanks
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  #32  
Old 06-08-2013
John.R John.R is offline
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Just a quick question, would a faulty kill switch kill spark?

I'm going through the list of issues on my bike at the moment, but it's definitely got spark, and can kick over briefly, then conks out.

When a killswitch fails, can it be intermittently? providing spark when grounding, but when running vibrate/fail
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  #33  
Old 07-08-2013
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It can. Turn the bars to see if it is a lose connection.

Is the plug wet?
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  #34  
Old 15-08-2013
John.R John.R is offline
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Just as a follow up to my issue (for anyone else fault finding).

I ended up with a wiring issue. Loose/dirty connector, although the plug still sparked fine when grounded against the frame.

Just because you have spark doesn't mean you can rule out wiring
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  #35  
Old 21-12-2013
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TTR-250 no spark, arrrgh!

dig dig!

hi all, have an issue with my ttr250, this might get a bit wordy..

stripped carb to renew some gaskets in it, dropped off the tank to do the same to the fuel tap then put all back together.. bike fired up fine and ran good on the stand, idle and rev no problems..finished putting all back together (seat and what not) then went to fire up and no go.. after a lot of pulling the carb back off, re-checking, re-fitting, still no worky..

pulled the plug out, no spark.. ok..
went thru the manual and armed with my multimeter, ive tested all electrical bits and bobs (stator, pulse pickup, ign. coil, kill switch wiring), all are within spec. also confirmed the stand and neutral bypass are still defeated (stops starter motor turning on these anyway). went as far as checking continuity on wires (ign coil feed from cdi, pulse coil -> ign coil earth wire, pulse signal to cdi plug), all good
swapped the cdi unit with my sons ttr, confirm mine works in his bike, his makes no difference in mine... tried shorting a spare plug to the frame, no spark there either.

so, what the hell have i missed?! im usually half decent at this but she finally has me stumped i think :/
cheers!
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  #36  
Old 22-12-2013
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Plug lead / cap?
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  #37  
Old 22-12-2013
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Measures in spec

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  #38  
Old 31-12-2013
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End result is a frayed wire / buggered grommet where it exits the case causing the trigger wire to short to earth. Coils and trigger measure ok as per manual but a quick check to earth as well revealed the culprit

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  #39  
Old 31-12-2013
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Glad you found the culprit, well done.
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