Race bike bogging and stalling on corner exit when low in RPM's. Thoughts?

[Chris RC390]

Check your radiator you might have a blown head gasket.

 

[streetfighter]

Check your radiator you might have a blown head gasket.

What kind of repair works are involved if it is a blown head gasket? Re surface the head and fit a new head gasket, that's all?


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[Chris RC390]

Contact KTM performance for their gasket kit and new head bolts. Get the head resurface, you might need remove some of the timing due to thinner head gasket.

 

[Maddog Reynolds]

Just a thought: check the crankcase breathers. My road bike started misfiring occasionally when opening the throttle at low-ish revs. I had white gunk ('mayonnaise') and loose water in the two breather tubes. As a standard road bike, these feed into the inlet near the throttle body. When I changed thenoil and cleared these tubes, the misfire went away completely.

 

[mdabyo]

breathers are fine.. fingers crossed its not a head gasket, i have driven around the neighborhood and seems fine but its not really pushing it. Track day on Thursday so we will see. I should know pretty quick if its a head gasket or not

I flushed the coolant just in case and it was clear and the oil was pretty dirty for only 3 track days but its sometimes hard to tell if there is water in it. no foaming though.

-J

 

[mdabyo]

must have either been the plug or not having the KTM map, the bike is running great this weekend! Saying that i am having idle issues i.e. it seems like it skips a beat everynow and then and stalls at idle sometimes before i go out. but no issues on the track. I tried the 15min idle trick and it seemed to do the trick for a little while then it came back.

Had it on the Dyno as well, curve looks great (thanks Chad the map is awesome) and pushed 41HP.

 

[isaac_]

Woo hoo!


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