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Old 12-27-2014, 06:32 PM   #1
TravelJunkie OP
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BMW R850R running rough + red hot catalytic converter

Hi All,

Looking for some help. My Dads R850R is running very rough, backfiring at times and no power at all. We have also noticed the catalytic converter is RED HOT after a quick spin around the block. I can only assume this is because unburnt fuel is being trapped in the exhaust and burning up in the hot cat.

This all came about after we changed out the battery and the starter motor. I am thinking something got screwed up when we took off the tank OR when we jumped the bike when the battery was dead.

I did check that the fuel vent lines are free, i have heard that it's is easy to pinch a line and the vacuum caused in the tank causes the fuel to not flow.


Thanks for the help!!
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Old 12-27-2014, 06:33 PM   #2
TravelJunkie OP
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Old 12-27-2014, 08:11 PM   #3
estlerd
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Throttle cables

Check the throttle cables at the throttle bodies. Make sure they are properly seated inside the threaded adjusters. If one is not seated correctly it could cause the problems you are experiencing.
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Old 12-27-2014, 09:02 PM   #4
JimVonBaden
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Quote:
Originally Posted by estlerd View Post
Check the throttle cables at the throttle bodies. Make sure they are properly seated inside the threaded adjusters. If one is not seated correctly it could cause the problems you are experiencing.
That is almost certainly the issue. You dislodged the cable moving the tank.

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Old 12-28-2014, 02:30 PM   #5
TravelJunkie OP
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Fixed! Just got the report back from my Dad, the right throttle cable had been dislodged! Thanks for take the time to reply estlerd and Jim VonBaden, the pics were a huge help. The power of online community!

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