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May 22nd, 2013, 05:41 AM   #1
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2008 FE450 cuts out when warm.

any ideas? just today engine starts when cold and idles well, after a short ride it dies. When cold it started well again but after about the same time cut out. Did this a few times. Does not want to start when last tried. Fuel getting to carbi ok. Plug looks normal, No strange sounds, however engine did feel like surges sometimes. Would this be a valve problem? electrical or fuel.
Anyone has this happen to their berg?
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May 22nd, 2013, 11:44 PM   #2
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Re: 2008 FE450 cuts out when warm.

Hi Racer,

Even though it is the later type ignition there could be a problem, your symptom is classic to a lot of ignition problems, starts ok when cold then problems start when the engine gets hot, the cause is an insulation break down of the enameled wire on the output source coil.
I bet once it has cooled down she starts right up again.

Regards

Sparks.
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May 23rd, 2013, 02:18 PM   #3
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Re: 2008 FE450 cuts out when warm.

Sounds just like what happened to my FC600 but it didn't cut out, just run poorly with lots of backfiring.When it was cold no problems, 10 minutes after riding the problem started. Had the Sparks rewind and it was back in business, runs great and starts so much easier.
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May 24th, 2013, 03:19 AM   #4
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Re: 2008 FE450 cuts out when warm.

thanks for the advice. I did have problems with the sem on my older bergs, but did not expect this on the kokisan. I will later in the week go through the spark, fuel, valves and then look at the ignition. I am wondering if the carbi kips electics would do this. Strangley the bike just stopped out of the blue under medium throttle. I initally thought it was strange/concerning. First thought was to check the carbi boot that can split and let air in. It started easily on the e start. I rode to a hill and joked that the bike may not start. It started easily on the kick start that I usually use...and went well. 30 seconds later stopped and would not start. When cold started, ran for another 30 seconds and stopped. same procedure three times. Got me to the road.

This would have happened to others??? I will let you know what I find. I have not checked the valve adjustment for some time, but I think this complete and instant cut out is more like ignition as you said. Has anyone else had problems with the kogasan ignition??
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May 30th, 2013, 07:54 AM   #5
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Re: 2008 FE450 cuts out when warm.

Update: have checked the valve adjustment and it is OK without adjustment. Examined the carbi drain plug well: no water, but some fine dust dirt, not much and not uncommon....don't think this would cause the cut out. Checked the plug spart: strong. Started the bike quite easily on the kick, two kicks and then tested the e-start: started easily on both. Road around and around the block waiting for the motor to die as it did after about 3 minutes about 4 times on the weekend before I had to be trailered out of the bush: bike ran perfectly. Parked the bike and let idle until the fan came on, then turned it off. Kicked and e-start both instantly. Could not repeat the problem of the weekend. Given that the bike went well I think it is an electrical problem somewhere....any more ideas before I start testing the stator. One thing though is this problem came after the first ride after putting one of those light weight batteries in. One thing is for sure the problem will not have vanished? Any more ideas?
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May 30th, 2013, 01:19 PM   #6
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Re: 2008 FE450 cuts out when warm.

I have had several wires break just where the wire is crimped to the connector.
a couple behind the headlight and a couple in the fuse block relay block. Bike would still start and run with a Kick but I guess all wires could break in a similar way.

You say that the fan is coming on which should mean that you have water in the rad.
Mine was cutting out when I had not realized that the water hose from the pump had been cut and the bike was getting hot. Eventually sorted when the engine went pop. Only realized all the water had gone when taking the engine out.
Other issues are the carb rubber you have already mentioned. Its not that obvious until you take the carb off.

Good luck.
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June 3rd, 2013, 05:27 AM   #7
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Re: 2008 FE450 cuts out when warm.

thanks, I will have to take the bike by trailer to a track and ride until it cuts out not far from an easy push and check the spark when it cuts out.
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June 13th, 2013, 03:47 AM   #8
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Re: 2008 FE450 cuts out when warm.

update: since many cut outs on open fire road ride, I have sought to find the problem 1)gone around the block a number of times and no problem. I changed the plug, checked the left hand kill switch, and took to a track and not far from the car. Road for a couple of hours on close fire trail, single track and bog: no problems. Stopped a number of times and started on the kick starter and then tested the electic, no problems, however, sometimes it would not kick start but always first hit on button. I don't think the new plug was the issue or the kill button sticking. The hard kick starting a few times I think is just a four stroke thing as over top dead centre approach always worked. In summary the bug has not repeated itself. I will give the carbi a total clean and reset the air screw, but believe the mystery still exists. Will do another close to trailer test and provide more feed back.
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June 15th, 2013, 03:26 PM   #9
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Re: 2008 FE450 cuts out when warm.

Tappets.

Taffy
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June 19th, 2013, 08:57 AM   #10
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Re: 2008 FE450 cuts out when warm.

Subscribed because I am having the same issue but with an Fe570. Though I know I did something really dumb that I am pretty sure cause this. I very briefly reversed the terminals. I was replacing the OEM with a Ballistic and did not realize the terminals were reversed. Just touched it and saw the spark when I noticed but it seems to have fried something. I am replacing the coil but don't think that is it. I am going to look at the stator next. Let me know if anyone thinks I should start a new topic about my issue.
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