Question about 2000 Yamaha DT 125 R
My bike starts when bumped but wont start of with a kickstart but it used to start with kick untill i put in shed for 3month as wether was bad bike was drained down when put away so has new oil and gas in can you help guys
You obviously look after your machine and very sensible when laying up, however as you are probably aware 2 strokes rely heavily on compression, A. to produce excellent combustion and B. to draw fuel into the chamber. So when you try kick starting you can't get enough revolutions to draw the correct amount of fuel into the cylinder, where as you push start you constantly turn over the engine increasing compression slightly and bingo it fires.
Can you remember how when kick starting it before this problem the feel on resistance when kicking over? has it now become a lot easier? if so you possibly have worn or broken compression piston rings.
A compression test will reveal this, I hope this sorts your query?
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Paul 'W' U.K.
Posted on Feb 06, 2009
Change the spark plug,common problem
Posted on Feb 26, 2009
Take the spark plug our and squirt some light weight oil in the cylinder or penetrating oil. Kick it a few times and it should turn over. Replace the plug and kick start it again.
Posted on Feb 07, 2009
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Posted on Jan 02, 2017
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