hiro Posted August 29, 2017 Report Share Posted August 29, 2017 Possibly water in the tank? Quote Link to comment Share on other sites More sharing options...
Tonik Posted August 29, 2017 Report Share Posted August 29, 2017 How old is the battery? Quote Link to comment Share on other sites More sharing options...
durk Posted August 29, 2017 Author Report Share Posted August 29, 2017 Less than 2 months is my guess Quote Link to comment Share on other sites More sharing options...
Gixxus Christ! Posted August 29, 2017 Report Share Posted August 29, 2017 3 hours ago, hiro said: I'm imagining it like this: When the bike is cold there is some vacuum in the tank. The sound of the fuel pump is showing that. The bikes warms up and the fuel expands and relieves some of the vacuum. But then, after pulling fuel for a while, it starts to create the vacuum again. That might cause reduced fueling...but, that might not be consistent with the power suddenly kicking back in. A mystery. heh Probably something simple. Maybe it is the pump. If this were the case it would just starve the bike out and it would stall and not start until it either sat long enough for the tank vacuum to leak down or the filler cap was opened. The more he describes it the more it sounds like an issue with the pump or plumbing. 11 year old fuel lines could be the issue. Sometimes the insides will deteriorate and you'll get a flapper on the inside that will intermittently impede flow. Or they get soft and don't bend as nicely and pinch. Maybe plumb in a pressure gauge and monitor it while you ride and try to force the failure, if it coincides with a fuel pressure drop, there's your huckleberry. 1 Quote Link to comment Share on other sites More sharing options...
hiro Posted August 29, 2017 Report Share Posted August 29, 2017 1 hour ago, CrazySkullCrusher said: If this were the case it would just starve the bike out and it would stall and not start until it either sat long enough for the tank vacuum to leak down or the filler cap was opened. The more he describes it the more it sounds like an issue with the pump or plumbing. 11 year old fuel lines could be the issue. Sometimes the insides will deteriorate and you'll get a flapper on the inside that will intermittently impede flow. Or they get soft and don't bend as nicely and pinch. Maybe plumb in a pressure gauge and monitor it while you ride and try to force the failure, if it coincides with a fuel pressure drop, there's your huckleberry. What is the cost of a pressure gauge vs a new fuel pump? The gauge is probably much easier to hook up! The old hose theory has promise. But now that I've said that, someone will say age doesn't matter. heh Thinking of cars again, is it possible that the engine is sucking air, or have an issue with an evap system? (If it's more than just a cap and hose.) Quote Link to comment Share on other sites More sharing options...
durk Posted August 30, 2017 Author Report Share Posted August 30, 2017 1 hour ago, Isaac's Papa said: Have you check for diagnostic trouble codes? No I haven't. I thought it would flash a code at me if it had 1 stored. I'll look at the manual. Quote Link to comment Share on other sites More sharing options...
hiro Posted August 30, 2017 Report Share Posted August 30, 2017 How about poor contact within the fuel pump relay? (I'm assuming that's how the system works.) I guess relays don't have problems very often. An error code or some type of meter or gauge might help about now. Quote Link to comment Share on other sites More sharing options...
motocat12 Posted August 30, 2017 Report Share Posted August 30, 2017 I've had luck with nylon flexible hose from dorman with crimp clamps https://www.amazon.com/EnDuraLast-FP-HoseKit-Flexible-Fuel-Hose/dp/B00LPX1JHY http://www.autozone.com/fuel-systems/fuel-line-repair/dorman-5-16-in-8-mm-x-12-in-with-barbs-flexible-nylon-fuel-line-repair/193135_0_0 Quote Link to comment Share on other sites More sharing options...
durk Posted September 4, 2017 Author Report Share Posted September 4, 2017 Installed the new-used fuel pump I got off EBay on Saturday. Took the bike out 2 up today for 1.5 hrs. Pulled in the driveway and dropped off my daughter then went down the road to test the bike out. Bike seemed to run great, no hesitation. This is good news. The last time I tested after my commute from work (30 min ride) I could notice a hesitation. I'm not 100% it's fixed, but seems it could be. The mechanic at the bike shop I stopped at mentioned it could be a bad fuel pressure regulator When I explained my symptoms to a buddy of mine who is a much better mechanic than I he also mentioned the fpr. On the 06 1000rr the fpr is built into the pump. So, maybe that was my problem. Thanks so much to all of you that mentioned things to check out, and help with diagnosis. 1 Quote Link to comment Share on other sites More sharing options...
durk Posted September 18, 2017 Author Report Share Posted September 18, 2017 I had a couple of you ask about my fuel pump swap on Saturday. Thought I'd give an update. Bike is running like a champ now. I did not realize how much it was running like a dog prior to the swap. It feels as though I gained 50hp back. 1 3 Quote Link to comment Share on other sites More sharing options...
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