| Author | Message | ||
     Dsergison |
my fuel pump turns on for a few seconds at the loud primimg level then turns back off when I turn the key on. Then when I start the engine it runs constantly at the loud level. the 2003 xb9 has 5,000 miles. anybody have any experience with this? thanks, Dan | ||
| Xring |
2004 XB9S, 7300 miles. Sometimes I can hear my fuel pump over engine noise, sometimes I can't. Apparently normal. Good luck, Bill | ||
| Kdan |
Yeah, mine does that. | ||
| Crashcourse411 |
The pump is a Walboro. I believe it is a g-rotor style pump from the looks of the pictures in the manual. They make a lot of noise, plus it is hard mounted, so it resonates thru the frame. The noise could also be caused by the regulator that is mounted on the fuel pump outlet, at idle conditions there is a lot of fuel that is just being dumped back in and not being consumed by the engine. If in fact it is a Grotor pump these pumps are known for being loud when warm in all applications not just our Buells. That is why in cars now they use an impeller pump instead. They are quieter and last longer(no contact between moving parts) and they have more flow and pressure capability. I am a Fuel pump Warranty Eng. for a major OEM Auto supplier, and I am hoping to make a quieter pump for my bike this winter. I don't want to have the down time while developing a pump this summer. So in a few months I hope to have maybe some part numbers and stuff for the do-it-youselfer that wants a quiet pump. | ||
| Bakadoh |
oh crashcourse... that would be awesome. | ||
| 99buellx1 |
Just buy the updated pump from Buell. It's now quiet. Part# P0130.02A8A Retail$ 303.93 | ||
| Indy_bueller |
I noticed that mine is alot louder when the tank is near empty. '03 XB9R | ||
| Crashcourse411 |
Granted we make millions of them a year, the pump only costs $15(cost to build not retail) the reg is $4(cost to build not retail) and the rest of the old assembly can be reused except of course the hose should be replaced. I could then buy another set of tires and have some left to pay for a track day. As you can tell I can't stand enormous amounts of markup. It like buying anything with the Harley crest on it. The only thing I have found that did not receive the Milwaukee Markup was Dunlops with the little crest going around the outside. Does this new pump have any marking on it? Manufacturer? Performance specs? and the number one question, is it standard on the new bikes? | ||
| M1combat |
What about engineering costs to get the specs and shape right? That's pretty expensive. What about subsidizing parts that commonly break (levers, pegs, mirrors, blinkers) in a low speed tip over with parts that don't break so often? I don't know that they do that, but I do know that low speed tip over parts are pretty inexpensive for a Buell  . | ||
| Dsergison |
the tank is full. and this started for the first time ever this morning. it was normal and quiet last night. you used to hardly hear it at all after it finished priming. something is not like it was 12 hours ago. | ||
| 99buellx1 |
Standard on 05's manufactured after sept. 1, 2004. Dont know specs or manufacturer. | ||
| 45_degrees |
Mine is just like that... loud sometimes, quiet other times. Doesn't matter if it's low or full on fuel. But it is normal, so I don't worry about it. I was pretty sure it was the regulator... or maybe cavitation?? I work with gear-type positive displacement fluid pumps that are fairly noisy but get really loud when air bubbles are introduced into the pump housing. It takes a long time for them to purge out any air. I trust Crashcourse knows a thing or two on fuel pumps though. Could it possibly be cavitation noise Crashcourse? | ||
| Cruisin |
Get a better exhaust and you'll never worry about the pump  I'm game for rebuilding it with quieter parts for a lot less than $300...sounds like a good winter project. (Message edited by cruisin on August 18, 2005) | ||
| Davefla |
M1, it's good on ya to stand up for the Motor Company like that. But I have to add: what about capitalizing the warehousing costs for stocked parts? I don't mind paying someone to make and store a custom configuration for me, but fuel pump prices in particular seem to be out of control these last few years. I'm not suggesting that I'd ever want to have any sort of automotive product be as reliable as my PC, but MAN would it ever be a great day if Buell parts standardization reached half the level of that market! Ahh, what am I whining about- at least I can still buy fuses most anyplace... | ||
| Crashcourse411 |
I realize that I just finished a project that had to account for all of that.  I just don't like, we sell to OEM $75, they sell to dealer add $150, dealer depending on region of country(RICH/POOR or so it seems), adjust their markup 10%-50%  | ||
| M1combat |
I hear ya Dave... I had a vanilla plain jane normal everyday common fuel pump go out in my '92 Sonoma GT in the middle of Kansas once. Cost me about $250 for the part and to get it replaced. It's a pretty simple little thing... Granted... I had a mechanical fuel pump go out on my '72 Mach and the replacement was something like $25 or so. I did the work on that one though... | ||
| Crashcourse411 |
Depending on the vintage of pump there is a purge hole that allows the cavitation to escape before leaving the chamber. Since it is a positive displacement pump the gears(powdered metal) are meshed together. This allows them to make noise depending on how they "broke in". As it gets hotter things expand and wear, once parts have cooled there is more "play". This only stops once the pump has heat cycled to the max temp and has run a sufficient time to break in. The noise that I hear on my bike could be from either the reg or pump. They are to close together to tell. I could not believe the amount of noise it made when I first bought the bike and took it to the dealer and they said that is how they all sound. I found an engineer here at work that has been around a while and he listened to it at both levels of noise, he believes it is just the pump. The new pumps that are made are impeller driven with plastic impellers. No part contact besides a thrush surface, brush/armature contact, and the mating surfaces in the pressure relief valve. | ||
| Dsergison |
that's great except it happened, litterally OVERNIGHT! oh well. guess I'll live with it. --- and re-up my towing insurance  |
