Author Topic: KX100 goes hard then bogs down after 5 minutes?  (Read 3962 times)

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Offline Orville

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KX100 goes hard then bogs down after 5 minutes?
« on: March 24, 2013, 02:34:55 PM »
Hi all,
My KX100 goes really hard after start up and for about 5 - 7 minutes, then (when its warm) goes off the boil - will not get back on song and bogs down like its running out of fuel. All I can do limp back to base. What is going on? I changed the plug - it made no difference - same fault. At first i thought it may be an air lock in the fuel dilery - maybe the tank was not vented to atmosphere - so I ran it with the cap off - still no go - wait for it to cool down - whammo - flying superbly - again soon as its warm - bog down time?

Motorrad

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Re: KX100 goes hard then bogs down after 5 minutes?
« Reply #1 on: March 25, 2013, 08:08:39 AM »
have you checked the water pump?    perhapse a broken bolt....



Offline Orville

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Re: KX100 goes hard then bogs down after 5 minutes?
« Reply #2 on: March 26, 2013, 09:06:12 AM »
Ok, so it might be overheating? Thanks shall check that out.

Motorrad

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Re: KX100 goes hard then bogs down after 5 minutes?
« Reply #3 on: March 27, 2013, 05:41:07 AM »
Ok, so it might be overheating? Thanks shall check that out.

very possible....

Offline Ims Roll

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Re: KX100 goes hard then bogs down after 5 minutes?
« Reply #4 on: March 27, 2013, 06:05:54 AM »
could be a bad head gasket? head seals when cold then as soon as in heats up starts leaking?
The 2-smoke runs deep in this one...