If your exhaust got cherry red then your bike is leaning out bad. Of the 2 690's I have owned with over a combined 36,000 miles that has never happened to me. You might have gotten some bad fuel clogging the injector but the O2 sensor should pick that up. I have done the 15 minute idle reset many time and never had this happen also. Check your air filter for being clogged. Any FI light?

 

No FI light and apart from this bike runs fine. The bike is new (300 mi on it) and completely stock. Some other people have also found their 690's and 950's to become red hot. You have to take a look up the exhaust pipe to the cilinder with dim light to see it.

If bike was to run lean that would mean small amount of gas or too much air. Why do you say air filter clogged?

Anyone else with this issue?

 

Me Duek glows red on the 15min idle, but then so did my 950 if left idling for a long time.

 

so maybe it's normal at iddling right? At iddle bike apparently runs excessively lean.

Appart from iddle mine is fine. I've checked up the exhaust to the cilinder pulling aside the road and no signs of reddish color at all. Only at iddle.

 

my previous stock 2010 smc also behave the same thing..red hot at the manifold (near the cylinder block)..
according to my dealer..it's normal for a stock 690 coz it do run a little bit lean from factory.

 

same has said mine. Apparently it is normal. Quite surprising anyways.

1) Do you think excesive heat through exhaust valve might have something to do with rocker arm bearings issue?
2)would this mean running iddle the bike for long is not good?

some guys don't let the bike warm up at iddle, just run at low rpm's.
3) what do you think?

 

but mine stop being red hot as I have installed KTM foam airfilter, Akra end can and Akra Map..