99 fuel pump maybe

[Heezus]

I hope this is the right thread.

Just bought a 99, amazing for a day then started doing all kinds of weird shit, got it looked at and had injectors cleaned, filters replaced (air and fuel) and a general service. The mechanic said it had been neglected by the previous owner but the fuel pump seemed fine(after reading here I made it a point to ask) . The next two rides were absolutely incredible and why I bought a motorbike way too powerful for myself, the third ride had all the same problems return.

I have searched everywhere I can for what might be the problem and get the impression that 99-00 fuel pumps are unreliable at the best of times let alone with a neglectful owner.

I have booked the bike in for next fri but have since seen an aftermarket fuel pump for a (I think) good price.

I'm not afraid of getting my hands dirty, but wondering if a novice installing it is a bad idea? Also wondering if an aftermarket pump with 43.5 psi and 95lph is a good way to go? Any help is greatly appreciated.

[revhead]

WHY blame the old owner ,parts wear out simple!

its easy enough to do , take your time ,parts are readily ava on the net ,

any further questions please ask!

[Heezus]

Haha I can't blame the previous owner any more than I can blame myself for not getting the bike checked before purchase. Either way it is mine now so I will make sure it is returned to its former glory. As long as the higher than stock psi and lph is ok, I will take my time and bombard you guys with questions as I get to work. Thanks.

[pan]

The 99ers go alright. They do have a notorious problem with the famous little bend in the hose that comes down out of the fuel tank. When you lift the tank it looks fine. When you lower it you can accidentally bend it and restrict flow, which usually results in loss of fuel pressure, stalling, etc...

Anyone that can help with pics of what I'm talking about?

[bazooka]

yes I agree with Pan - make sure it is not kinking when putting tank down - will run like a hairy goat or stop on you. Baz

[yella]

yep have had the kink issue I could ride around normally and it was good but get up it and go close to redline and it would run out, ended up making a alloy tube bend that solved the problem

[Heezus]

Just swapped the fuel pump over and also more substantial fuel and return line. The bike didn't start, turns out it was just not enough fuel in the tank(most had soaked into my jumper). Once it started it wouldn't rev past 3000, I turned it off then on, big improvement but I noticed a slight delay from twisting the throttle to revs going up. Turned off and on again, seemed better but it was too late to keep reving in my sisters garage and too wet to take it out. Fingers crossed tomorrow it magicaly works properly.

I'm pretty sure I got the fuel and return lines right but if anyone knows anything about the results iI'm getting, please let me know.

Also what are the two hoses at the back of the tank? And where do iI route the hose to nowhere? (as it slid out I didn't realise and remember)

Thanks again for all the advice and help.

[revhead]

the 2 x hoses at the back ,one is a vent for the tank and the other if from the filler cap area to drain this ,area if you over fill and flood the cap area just stick them between the swinger and the frame

[Heezus]

Ahhhhh that makes sense. Thanks

[Maj]

Things don't magically work
its either right or not
only way to be sure is test it for pressure and flow

if you have used non standard hoses the chances of kinking are higher , be my first check , then flow /min at 43 psi

[Thompy]

Saw it on FB very recently, someone mentioned a texta'd F in front of the engine number, means it got the strainer recall mod from the dealer, might be worth checking while its down that far, just a thought, and it was backed up by a pic of the actual recall notice, was for gen 1's.

Diesel.

[Heezus]

Latest is I clearly will not be putting a purple "magic happens" sticker on my bike any time soon. Yep, Maj was right, as flimsy as the OEM hoses are, they are moulded. My "more substantial" hoses kinked straight away. Got and installed OEM hoses, no kinks, pump seems to work(don't know how to check pressure and flow rate) but still the same problems. In neutral it struggles up to 3000 then revs it's arse off. Same when trying to ride it.

Any ideas on what else I should try or who I should bring it to?(in Melbourne)

Odd sensation, the more trouble it gives me, the more I stare at it and appreciate its practical vulgarity.

[revhead]

if you have the original over springs from the stock hoses ,put them over the new hose this stops them from kinking ,i have done this to mine ,no probs now

[Heezus]

Springs on already. I checked lines again and again. Does not seem to be the issue, but with my mechanic skills I can't say for sure. Love/hate doing it myself. More success and it would be love/love doing it myself.

[revhead]

thing is ,i found when i bought high pressure fuel line from repco then after about a week i noticed a smell of petrol,only to notice the fuel hose had melted from the inside out, and the bastards charged me $19 a metre, so i replaced it with new hose from ford ,no more hose probs