Question about 2003 kawasaki KX 250

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I have a 2000 kx250 2-stroke I have jetted it per the pipe mfr and it starts 1st or 2nd kick when coold. When it is hot you need to kick the @&$(% out of it b-4 it will start.

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Sounds like it's flooding...majority of pipes "don't" require jetting in older 250's...if they sent the jets with the pipe, find a happy medium in the numbers...for instance; if you had a 118 stock, and they said use 124, use a 120 instead...bottom line, you gotta reduce the fuel...quick trick ? just loosen the clamps on the carb and turn it sideways and remove the bowl...you don't have to remove the carb to re-jet...

Posted on Apr 26, 2010

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My sym jet sport x has no power whats wrong with it


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1 Answer

Temperature is to high. the engine runs hot


ok you could have a few things happen here. when is last time you changed your coolant?? start there. next is your fan coming when it needs to?? let your bike idle and see if it kicks on if so let it go till it kicks off. it the fan is not working then your fan motor or temp switch could bad. next have you put aftermarket pipes on the but? if so have you jet the to run with the pipes? if not your running the motor "lean" and this will cause the bike to run hot.

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1 Answer

Hi i just got a 1990 xr600 ! it starts 1st kick when cold but even after just 10 mins of riding she is red hot and is immpossible to start ! why or what causes this ?


Too lean!

Carburation is more than likely set too lean, or like one of my buys, had a cracked inlet manifold..letting in air.

The site below shows the carby in all it's glory with every part and name. The list of jets size# are for the range of riding conditions for that bike. Get jets at least one increment UP in size. They're available from all bike make dealers.

Exhaust, cam or valve timing/modifications will efect jetting to some degree, as will the need of a top end service.

Cheers.

http://www.cmsnl.com/honda-xr600r-90-us_model7779/partslist/E++1601.html

May 19, 2010 | Motorcycles

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04 yz250f pipe at motor glowing red hot


Any reason you had to change the jetting??New pipe,Intakes.?But,even though you may have it a bit rich on idle the pipes WILL get very hot,very quickly without some sort of air flow over the front of the motor and radiator.At the very least,have a strong fan blowing directly on the front of the motor if you are going to let the bike run and you are not riding it.I have seen the white plastics in front of the radiator distort from the radiant heat.Don't idle them for in more then 20 seconds.It can do heaps of damage.Ride the bike and see if its running well.When you stop,turn it off.All the yz and wrf will get very hot at idle.Hope this helps

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1 Answer

My 2000 300 exc it will still get into band but is gutless down low is that my rings


It could be worn out piston rings. But it could also be many other things, like: plugged up slow jet circuit in the carburetor, an air leak between the carburetor and the engine, excess carbon buildup inside the exhaust pipe - or in the exhaust port.
First, I would check the compression. WIth the gauge attached and the throttle held wide open, several good kicks of the kick starter should reveal at least around 100 psi of compression. If it's much lower than that, plan on new rings - or re-boring the cylinder to the next oversize and go with a new piston and rings.
And keep in mind that two stroke motocross engines are all relatively gutless at low RPM.

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1 Answer

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Check the kick down cable. If it sticks the transmission won't shift. I sprayed WD-40 on both the top and bottom connectors , and it worked like a charm. It's alot cheaper them spending 2000 on a new transmission you don't really need.

Oct 30, 2009 | 2000 Jeep Grand Cherokee

1 Answer

I have a 2000 cr80rb 2-stroke and when i kick start it, it sounds like the throttle is up to high.......any soultions


Sound like it's jetted too lean on your idle jet in your carburator. That will make sound like it's "running out of fuel." If that's true, you plug will turn white if you let it run that way for a while.

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1 Answer

Missfiring, banging on over run,starts after about 10 minutes


Weak or failing ignition coil and/or module will cause this, as will a flooding carb.

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1 Answer

R6 huge bog


Check the TPS to be sure but it sounds more like fuel supply problem when it is cold.Check the chock valves in the carbs.When it kicks in if you close the throttle does it do it again or it does not do it at all after those 5-10 min?

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