1988 Suzuki DT140 performance Issues

Joined
Apr 16, 2008
Messages
14
I am sorry if this has been answered already but I cant find an answer. My issues with this motor is it idles fine in neutral but not when its in gear. It idles along in gear and then kills. When running under power it does good for a little while and then it slows down some and then speeds back up repeatedly. Water pumps strong, carbs have been cleaned. Bulb is brand new and brand new inline filter. Fuel pump is clean and working. I have been told it could be the TPS but I just want other opinions from someone who knows more than who told me it was the TPS. Any ideas? Thank you
 
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