Originally Posted by Endurodude
" . . .the one that comes to mind is F800GS with 12:1 ... several instances has already been recorded of engine failures... probably due to bad fuel."
__________________________________________________ __________________________________________________ _____________
Not wanting to de-rail the post, but is there anything that can help prevent poor-fuel damage in the F800? Yes, good fuel obviously
I have an F800 and it would be useful to hear how others have dealt with this problem.
YES... it's quite easy if you have been warned and know specifically what to watch out for.
note this warning is not just for F800GS... also apply to other bikes with 12:1 compression without knock sensors
the word detonation immediately brings out all sorts of technical mumbo jumbo.... differences between detonation and pre-ignition, has it been remapped,.... etc, etc, etc.
then compound that with most folks wear full face helmet, some with ear plugs. then add tendency to want to ride it out, when our engine stumbles.
high compression (12:1) engines without knock sensors, has only what's between your ears to keep from destroying itself. in the unlikely event of a bad load of fuel with diesel mixed in. let's say a mama fuel vendor pumps gasoline and diesel from 55 gal barrels. then uses the same container to measure/dispense different fuels. or same 55 gal barrel held diesel, then filled with gasoline. it doesn't take very much diesel mixed with gas to effect octane.
most reliable sign of engine detonation/pre-ignition (knocking) is a loss of power! regardless of what is causing your engine knocks a loss of power will result.
DON'T RIDE ON .. STOP! multiple things can cause a loss of power. but if you experience a loss power immediately after refueling, odds are it's fuel related.
take your helmet/ear plugs out. then lightly apply throttle. if you hear engine knocking, drain bad fuel out... put new fuel in, then allow engine to idle only, until contaminated runs out. no big deal... on your way
engine gets the all clear, after you can apply full throttle without knocking. much rather get a dead motor, then one that still runs until it destroys itself. $2,500+ damages could financially end trips.
IMHO BMW should have never released a GS bike without knock sensors. knowing with history of GS bikes. some buy GS bikes for Starbuck trips, but some folks buy a GS bike to travel the world.
and yes ... I've already been slammed a few times for trying to get this warning out. note in no way shape or form am I saying F800GS is not an excellent bike. just that it has NO knock sensor to protect 12:1 engine, if you should get a bad load of fuel.
do a search on ADV and HUBB ... multiple instances of destroyed F800 engines from bad fuel ... including instances of destroyed engines from bad fuel in USA. odds are less, but one can get a bad load of fuel in America or anywhere else.
odds are if they had the benefit of above ... they could have STOPPED...drained bad fuel, idle out contaminated fuel, be on their way