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Old 09-13-2013, 11:00 AM   #105
I Survived The '60s
Valleyrider's Avatar
Joined: Apr 2007
Location: Idaho Panhandler
Oddometer: 1,884
Originally Posted by Inane Cathode View Post
New reeds, seal fine. New crank seals, sealing fine. Compression test 90 psi at this altitude is fine, two carbs absolutely spotless that have the exact same problem has to be impossible. I don't think it's mechanical, i really don't.

I guess the ignition coil could be breaking down or something but its not like its a weak spark. It's either crazy mega fat and blindingly bright, or nothing. When you go to kick these over with the plug out checking spark, it sparks quite rapidly, no? Mine kinda just every once in a while sparks, you know?
The results of your compression test concern me!
At the bottom, read the special note. Not able to pull up any info for the DT400, but your compression sounds low and may be a part of your issue.
'07 1250 Bandit, '06 650 VStrom, '78 SR500E
'68 Yamaha DT1, '78 TT500 and no money
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