OK guys I'm in a bit of a pickle, my bike keeps dying on me at speed (highway or when a decent amount of throttle is used). My mechanics narrowed it down to a sh*t fuel pump and badly worn needles and emulsion tubes. Basically i don'h have the 1200 dollars i got quoted to fix this, so does anyone know where i can get them besides Yamaha direct (the tubes and needles). A genuine Yamaha fuel pump is a bullsh*t 450 bucks, however a pump for a cbr-r is only 220 and a guy from a wreckers said that they are pretty much exactly the same. Can anyone vouch for this?? I know that there is generic brands but i have one on there now which has lasted 8 months of use so don't want to waste money on a quick fix. Also i quite dislike the idea of getting rid of the pump and doing that keep-two-litres-in-tank-and-it'll-be-fine thing cos i do around 70 kays a day on it so unless i stop at the servo everyday ill run out of fuel. I got a guy at Yamaha to call mikuni and they dont sell the bits for fzr carbs, even thought they made them all the spare parts went to Yamaha. So help anyone??? please.....
ANY FZR / YZF / CBR / WFT outside-the-tank carb'd bike pump will work. Look on ebay, expect to spend <$50. Hell, a cheap (carb!) automotive fuel pump will do the job. Just don't get a 45 psig FI pump... <!-- s:alcoholic: --><img src="{SMILIES_PATH}/icon_all_coholic.gif" alt=":alcoholic:" title="Alcoholic" /><!-- s:alcoholic: --> I want to say that some have had their 3LN run dry without a pump; we've definitely established that the 2KR needs its pump to get all the gas out. Have you checked your fuel cap vent? Go for a hammer down the highway (safely, please!), and pull over as soon as it start to die - actually, the longer you can hold it the better the test. As soon as humanly possible, get that tank cap off - perhaps a second key, so you don't need to dick around with the ignition, just hit the kill switch. If you hear a WOOSH of air being sucked in, the vent is obstructed and the tank is pumping down. At low speeds, you don't notice it, but when you reach a threshold fuel flow, the outflow of fuel is greater than the inflow of air, and you generate a vacuum inside the tank. As that vacuum gets stronger, it starts to interfere with the flow of fuel, eventually dropping the level in the float bowls and starving the engine. Cheap and simple checks first! <!-- s --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt="" title="Very Happy" /><!-- s -->
Ahhh... that seems entierly plausible, however today before actually starting the bike i hit the kill switch about 3 times to get the fuel pump to do its thing (ie the amount of fuel it should be putting through and it seemed to run better... for a bit). I don't even need to go on the highway for this to happen anymore, ill come out of where i live, give it some gas to merge with traffic in a 60 (kay) zone and 200 meters down the road it will start struggling. Seems to get worse and worse everyday. These reasons make me thing its the fuel pump but im no mechanic.. This fuel cap vent, is there a hole as such that i can check or is it actually part of the cap on the fuel tank? Oh and something i forgot to add to the first post: When it does die, (sometimes it will struggle, i pin the throttle completely and it will accelerate slowly, then back off back to 100 and it will go again but thats only happened twice) to get it going again i simply have to hit the killswitch (fuel pump) once or twice then itll start straight away, as if nothing happened. I'm going to call someone about a second hand genuine yamaha fuel pump tomorrow and see how i go, the guy might also have a set of carbies (as stupid as it sounds itll be cheaper for me to get a whole second hand carby set than just the damn needles and tubes by the sounds of things). But if anyone can let me know about if i can check the fuel cap vent without riding the bike and doing that little trick and where the vent actually is that would be great. Thanks Dontz <!-- s:Biker1: --><img src="{SMILIES_PATH}/th_Biker_1.gif" alt=":Biker1:" title="biker_1" /><!-- s:Biker1: -->
Hitting the kill switch seems to make all the difference - I will go with the fuel pump theory. If you have a 3LN then just bypass the pump completely (join the "in" and "out" hoses together, unplug pump from power) and take the bike for a ride and it should be cured. If it is cured then replace the pump at your leisure. If you have the 2KR do the same but make sure you have over half a tank of petrol.
I have a 2kr, and the carbies have been balanced and cleaned. The guy i called doesn't have a fuel pump and turns out CBR-R fuel pumps will do the same job but the hoses are a different size completely (a lot bigger). It bogged and died on me twice, travelling in 60-70 speeds over about 10 kays.. seems to be getting worse and worse. I'm hoping for a call tomorrow from that guy, he said he'd try and source a genuine one for me. The mechanic and an independant guy who worked on heaps of FZRs said that aftermarket ones wont last long (which i believe as its already happened to me). Charlie, how would i check if the spark plugs are getting enough through? Oh and to make everything more brilliant, the water pump started leaking coolant the other day, out of the gap but the screws are done up as tight as i could possibly do it (alan key with a spanner on the end for better leverage). Would some of that Insta-gasket stuff do the job or would it just keep leaking? thanks
Its dripping out of the gap inbetween where you take the cover off (you can see it from the side with the fairings on) and it has a pipe coming out the middle and 3 alan key screws hold it on. Out of the bottom between the two screws is where its coming from. But only when its hot. If it is the water seal can a paste gasket thingo do the job?? if not then what? cheers
This bike keeps getting better and better :\ I'm going to call up a bunch of wreckers tomorrow and see if they have a 2kr with a genuine yamaha pump (long shot but don't have much choice, its pretty embarrassing when your bike dies on you on the ipswich motorway).
Just an update for anyone who was reading this... On tuesday i found a wreckers who had a whole bunch of different parts for the fizzer and got a second hand genuine pump for it. Seems to have fixed the problem so far. Accelerates right through the rev range (used to start dying at 10,000) and hasn't died on the highway <!-- s --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt="" title="Very Happy" /><!-- s --> But bloody hell it was an effort to put it in, those other mechanics changed the bracket so they could fit in their aftermarket pump and well the genuine didnt fit so well (cue cable ties). The name of the place is City Motorcycle Spares, he's in slacks creek, brisbane and hes got quite a few bits for all different bikes (the first part i saw was a rear shock for a 3ln1 on a rack, if you can't find a part i'd recommend giving him a call.
