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Old 10-31-2012, 01:14 PM   #11
fred flintstone
Studly Adventurer
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Joined: Apr 2009
Location: Above 7600 ft.
Oddometer: 539
Originally Posted by HardWorkingDog View Post
It seems more prevalent with the 08's but some have reported issues with 09's and with replacement pumps as well.

My guess is that the only thing that has changed is either the supplier (oem) or the quality control forced on the supplier but not the design itself. The pump is used on several different manufacturer's models and random but infrequent failure is a common theme.
I have looked but cannot find any info as to whether bikes which see pump failures are mainly

a) modified with exhaust FMF, airbox etc. and so running a great deal more fuel

b) run the tank dry often, or at least low

c) ridden mostly very hard and/or heavily loaded

d) all of the above.

Reason I am asking is I was wondering if a bike had no major engine mods, rider wasn't really beating the bike up much, never runs the tank dry, would they have zero chance of failure or 1/2 or what? It may be that the pump capacity is very near its limit on a WOT stock engine, and when pushed via mods or excess heat or thrashing whatever, it pukes. Not making excuses it just seems no one has come up with the failure modes and probable causes from my reading up on it. Has not happened to my 08 bike yet but I am pretty easy on it, have other bikes for beating up.
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