when i bought this 2nd hand bike der was no prob at all. Starting it needs just a slingle click and small reving. After 4 days i have problems starting the bike. Bike Status: 1. Fan is on at startup 2. Spark plugs are clean 3. AIr filter is clean 4. Battery OK 5. Engine oil OK 6. my normal cruising rev is 6000-8000 rpm At first It will start wen i fully choke. if i press the start button long enough it will start (about 7 sec.) But now it is really hard to start it up, If i press the start button (fully choke) it will eventually discharge the battery and never start the engine. I connected my battery to an engine assist apparatus and press the start button(full choke)...it will start in 15 seconds. The battery is not the prob since it only discharge if it takes too long for the engine to start. But if the engine would start and rev it a lil until its stable and turn off the engine and after 1 minute or so i start it again....one click and the engine will start. It is only hard to start if i dont use the bike for 4 hrs and up One more problem: Whenever i used the bike (1.5 hrs or 26 kms) and idle it in the garage, the engine will stall after 1 min. I have to rev (every 5 sec) it or suffer the consequence of stalling. What makes it hard to start? what makes it stall? Please help.
The dying could be caused by the low idle speed. You raise the idle speed by twisting the wheel located on the carbs. Raise the idle till the engine sounds 'right' and the idle speed is at approximately 1200-1500 rpm. As for the starting issue, what kind of fuel are you using? This may be critical.
Id say bump up the idle speed as well. Also..when your starting it..do u just hold the start button? If so, try holding the start button and give a small twist on the accelerator as ur doing it.
Based off the information provided, I would hazard 3 guesses: Compression- is low to some degree. As the engine warms up, parts expand. Spark- weak fire coming from the coils. Fuel- pump is not working to up-most capacity.
when u say it eventually discharges the battery... how long does that take? if your battery is stuffed... it will crank over, but not quick enough and the voltage will drop and the coils will not provide a very good spark.. if it seems like it restarts after its been running or started.. well the plugs and chamber will still have a little heat in them which will assist in igniting the fuel, another thing is after its been running... the battery will have a surface charge on it from when it was charging.. that too would help it restart after running.. does the bike start easy when you jump start it? try jump starting it when u first go to start it! mine was a bitch to start on the mornings, had 2 use full choke.. but the other day i found one of the carby-airfilter clamps was loose which would have upset it seeming these bikes are sensitive to letting to much air in.
Thank u people for giving me alot of infos. I found a solution (got the idea from the people in this forum). I tested it this morning and i got an amazing result. 1. Fuel !!!! (Premium is causing me this problems) True they say that higher octane rating is hardr to burn than lower octane rating. I guess that spark plugs cannot easily burn the premium fuel at statup. Premium fuel is denser than unleaded. The carbs cant perfectly atomize the fuel on cold startup. The previous owner of my bike told me that brand new bikes are capable of premium fuel but not older bikes. He was using unleaded fuel for the bike (too late to inform) So I drained the tank and the fuel filter. Pour in the tank 5 liters of unleaded. Charge the battery and pray. after 4 attempts (10 sec of pushing the start button per attempt)...the engine finally run. Im having difficulty at first bcoz i thought that it will take a while b4 the unleaded to circulate in the system. I ran the bike for 2 kms. and after 6 hours i ran it again..the engine starts at 5 sec. (2 attempts) and now it only takes 5 sec (no choke and cold) to start the engine. Prob solve. but my bike is under observation. il will run the bike for 150kms just to make sure that the engine will get used to unleaded again and consumes all traces of fuel. One question: Is there a possiblity that i might damage something in the system bcoz b4 i bought the bike it was running on unleaded...then i used premium for 200kms of running (then the problems occur)..then back to unleaded again?
Still sorta weird that it takes 5 whole seconds for it to start :S. I would have though it should be starting straight away. As I said before...when u hold the start button..do u blip the throttle at all? I find this helps on cold starts..gives it that lil bit extra.
just out of interest, how much petrol did you drain from your fuel tank? i use 98 RON fuel with no problems... simon
Premium vs Unleaded I've heard that a lot of bikes don't like running on premium unleaded, such as the Shell optimax, as it causes plug fouling. My best bit of advice would be to drain all the premium, replace it with regular unleaded and then replace the spark plugs with fresh ones.
i'm not sure why the premium fuel would be causeing the problems with starting, my fzr is definatly not new, its an 88 model with around 74 000 km's on it and i run it with 98 octane and it starts first time all the time. like Grendal said it is a bit weird for it to take 5 secs to start, maybe theres another problem somewhere
when you said you 'drained the fuel filter' did you actually replace it? or just use the old one? maybe its clogged and stopping proper fuel flow to the carbs simon
My husband was running his GSXR 750 on premium unleaded and had all sorts of problems from hard to start to flooding coming out of corners he was advised to switch to regular ULP and we now run both our bikes on it with no problems
I drained the fuel and replaced it with unleaded. its a lil bit weird for me that a very complicated problem was resolved by a simple solution. I woke up this morning tried my bike and the engine starts in 3 sec (cold and no choke with lil throttle). I went to work (26km and mild traffic) with no probs. after my work (9 hrs) i started it again in the parking lot...the engine starts in 1 sec (or shall i say "one click"). I still consider your experiences and infos with your bike and i wont compare it with mine coz my solution its very simple. mybe its not applicable with your fzr. or mybe i ddnt see all the angles. but i wont stop discovering and collecting infos and facts from u (all memebers of the forum). Like wat i said..my bike is still under observation. thank u.. sa uulitin (til next time)
hmmm ok... well as long as the bike is working fine and youre riding again <!-- s --><img src="{SMILIES_PATH}/icon_smile.gif" alt="" title="Smile" /><!-- s --> cheers simon
Agreed - bikes are tempermental - what will work for one person with a specific model of a bike may be totally innapropriate for another. Find what works for you and stick with it. My old fzr liked running on premium, my new bike likes running on regular unleaded (tried it on premium only to find plugs were fouled after a week of riding). I still use premium sometimes on longer journeys though as it does help with mileage (it only fouls in the stop/go stuff).
about using premium unleaded - i was told by the mechanic who sorted my bike out never to use shell optimax in it because its a denser, different fuel designed to run very lean and designed specifically for late model cars which are fuel injected (unlike the fzr) - any other premium fuel or standard unleaded should be fine. I've used both with no real differences noticed
i would like to clarify about my statement abt "drained the fuel filter". WHat i mean was i drained the fuel in the tank and the fuel in the fuel filter.
