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Starting issues

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Recently i got an 05 rmz450 for a great price, run great, but a few days ago it became a pain to start and will occasionally backfire when starting. Any idea on what might cause this? Easy fix or of to the shop?

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I have a 06 rm-z450. I took it to the shop valves were fine but the carburetor need to be clean, new sparkplug now start at the first kick.

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Thanks for the advice, taking it to cmp suspension to get the valves adjusted, an i just put a new spark plug in, hopefully that should

Solve the problem if not then ill get the carb cleaned

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Any news on your bike?? I have a 2006 rmz450. I bought it and I couldn't get it to start. It would take 20 to 30 kicks!! The guy claimed it only had a hour on a rebuild. I got the bike to start but I messed with a black screw right under the choke I think k it might be the idle air mixture screw. Anyways I've tried bump starting the bike and get nothing. I've tried every variation of the screw and the bike won't start. I bought a new plug and cleaned my air filter and put new gas in. Still no luck. I'm so over this bike and I haven't even rode it yet! Have any ideas ??

Edited by chrislowermz450

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Any news on your bike?? I have a 2006 rmz450. I bought it and I couldn't get it to start. It would take 20 to 30 kicks!! The guy claimed it only had a hour on a rebuild. I got the bike to start but I messed with a black screw right under the choke I think k it might be the idle air mixture screw. Anyways I've tried bump starting the bike and get nothing. I've tried every variation of the screw and the bike won't start. I bought a new plug and cleaned my air filter and put new gas in. Still no luck. I'm so over this bike and I haven't even rode it yet! Have any ideas ??

Im taking it in at the end of the season but after talking to a few 450 owners the valves are usally the issue. One guy got to the point of pop starting his Kawasaki by towing it behind a vehicle. Depending where you go it will cost between $150-350 (350 was at a power sports dealer 150 at cmp suspension). that's got to suck though, the rmz's are great for hill climbs and sand

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