Question about 2002 KTM LC4 625 Sc

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Hard to kick plug in/out backfires possible causes

Have a ktm 620 sx 2000 model hard to start back fires hard to kick with the plug in or out any possible remedies

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  • scott_77
    scott_77 May 11, 2010

    Timing may be out. Has it had any major engine maintenance recently?

  • me86 May 11, 2010

    When was the last valve adjust performed?

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  • 11 Answers

Check vale clearins if that fails check statour / pick up . make shour it hasent broke the woodruf key in the fiy wheel

Posted on Jun 07, 2009

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Posted on Jan 02, 2017

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2003 KTM 250 SX won't start. When you kick it, it starts to fire but never turns over. I accidently put the wrong gas in it. It takes 60:1 but I didn't put enough oil in it. It died while I was riding it....


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I try to kick start it and it just backfires, and then right after there is so much compressions it just about takes my leg off


hi,this should be fitted with a decompessor,if it is not,then try this,gently turn the bike over with the kicksart untill you feel the piston coming up to top dead centre (you will feel the compression rising)thenlet the kickstart return to its normall position,now give the kickstart a good healthy kick and the bike should fire up,if you think a 450 is hard work,wait till you try a 500 velocette with no decompessor if you dont get those things right they will either fire you over the handle bars into the workshop bench or break your leg in the process or worse a combination of both the above..good luck..hope this helps...cheers

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How do i start my ktm 450sx thats a kick start model 2006


get the kick start so its just about to go on the compression stroke and stand on the kick start and rev it as it dioes it remember there are 4 strokes and 1 firiung stroke also use the choke on cold starts for 30n seconds

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2005 ktm 525 sx is hard to kickstart , is there any trick to maket it more easy to kickstart?


Yes, there is a proper way to start the engine. Four controls are on your bike to assist in starting.
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  • The " Hot Start " Lever, used when the engine is hot. Pull the lever to lean the fuel mix when the engine has been running.
  • The de-compression lever, always used.
  • The throttle, used to prime the cylinder.
Don't kick, instead, push the kick lever downward. You will feel the back pressure as the piston is going upward on the compression stroke to the point the pressure is great enough that the kick lever "locks up". You are very close to TDC. NOW, pull in the de-compression lever. Push the kick lever a little bit more to get the piston past TDC. Now release the de-compression lever. Give the throttle a 1/4 turn then let it snap closed. A diaphragm in the carb gives a shot of gas when this is done. DO NOT do this multiple times because you will flood the engine. Leave the throttle closed when kicking. Now give a strong kick through the full sweep of the kick start lever. Quickly get your foot off the kick lever at the end of the kick to avoid any chance of "kickback" from the kick lever. This happens in the case of a misfire, aka > backfire. It can be very painful, and can even break a leg. I am serious about that. Repeat the process (but without the throttle priming), until the bike starts. A good battery, a clean spark plug, a clean carb and clean air filter will also aid in starting.

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250cc engine


250cc engines vary on size and design by make and model. It is possible to put on in however you will have to make a bunch of modifications and possibly make some new engine mounts and on top of that it may not be a Kawasaki motor tha ends up fitting. For the difference in power its not really worth the hassle unless you are on an adventure..

Joe

May 26, 2009 | 2000 KTM SX 125

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