Maintenance & Technical > KX500 Original

Parade Lap K5

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Hillclimb#42:
 Hey Guys,
 My K5 always needs a little "parade lap" to warm up and clean out fully. It seems like it cleans out in neutral, but is still loaded up a little at top-end ,in gear,before eventually cleaning out for the rest of the day.
 The problem though, some hillclimbs do not allow pit riding.
1. Does it make any sense that it only cleans out fully, in gear?
2. Can I fix this issue with a float adjustment? or draining gas after a ride?
( Second motor in this bike to have the same trait ) Only happens on first start up of the day...??

Johnniespeed:
 It was my understanding that this is caused by a cold pipe, and the reversion pulses from the pipe do not work correctly until the pipe is hot.
  I do not claim to fully understand this, but I have watched racers use a "Reddy" heater aimed at thier pipe to preheat the pipe and engine.
 My bike does not seem to "warm up" by just running the engine, I have to ride it for a few minutes to get full power.
  I am sure other people on this site can explain this in a more scientific manner, but for me the "cold pipe theory" is easy to understand.
 John

Hillclimb#42:
That does seem reasonable. I've seen some guys with their pipes wrapped with insulative tapes to warm them up faster.
  It seems that it can cool off for an hour or more, and will not act the same way it does on first ride of the day. Maybe I'm wrong about that. I thought it may be fuel in the bowl and gas line that may evaporate and leave me with alot of two stroke oil to get burnt out.
  Why doesn't it clean out well in neutral? The pipe will heat up idling.

tharden:
Mine is the same way.  I can let it idle until warm, but it takes running the bike to clear it out and have power.  I think as you let the engine warm it does not have the proper head temperature to burn the oil in the gas and accumulates in the cylinder and crankcase. Then when you put the engine under the necessary strain it gets to proper head temperature and then clears out the engine.  This is just my thought as the oils in a water cooled engine take a higher head temp to burn compared to a air cooled.   

KX500freak:
my k5,s are rolling right after starting up ,
then a paradelap :lol:with kindness while opening up throttle bit by bit.
after that its giving you the permission to go full out

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