11 450f hard starting

7 replies to this topic
  • poppa

Posted June 20, 2012 - 01:54 PM


Using the high load/ sand map at the top of this forum, the bike is hard to start after a hard run get off. Anybody have any ideas? Bike has about 50hrs, good gas, oil changed every race. Dosen't seem to be as much an issue with bone stock map.

  • poppa

Posted June 21, 2012 - 05:48 PM


prolly rider error in the starting technic?

  • poppa

Posted June 23, 2012 - 08:24 PM


come on, somebody has a comment.

  • ka24s14am

Posted June 24, 2012 - 09:59 AM


my 2012 can be funny about how it wants to start

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  • MX763

Posted June 24, 2012 - 11:38 AM


My 2011 is a bitch to start when it's hot. I have the Jay Marmont tune with an FMF slip on. It fires up cold no problems but when it's hot it's a bitch. I have been using the fast idle/ hot start knob more and it seems to help. I wish they went back to manual compression release. When I went down or stalled my 426 I would just put it in neutral and pull in the manual compression release then kick it through 4-5 times. That beast would start up the first time every time.

  • Joe846

Posted June 25, 2012 - 07:03 AM


Like the other poster mentioned, sounds like procedure error. I thought mine was harder to start with a different GYTR map, but as long as I follow procedure, it starts the same crash, stall or kill switch. The only difference is I have to clear it out, per the manual, with the throttle wide open when if I crash, then start it.

Also, I don't think the starting map is different whether or not you have a GYTR map or not, from what I've heard.

Other issues could be valves @ 50 hours. Mine were on the tight side of spec at the first check, so if yours are already tight it could be causing issues.

  • poppa

Posted June 25, 2012 - 01:34 PM


thanks for the replys. I will go through the procedures with the rider (my son ) again an we are checking the valve lash this week. From what I understood the mapping change that we did wouldn't affect the starting, just a hurry up leg.

  • brentn

Posted June 25, 2012 - 06:23 PM


Pull the cold start knob out and try, yes it works very well when the engine is hot.

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