ok, so after reconditioning the engine, balancing the carbys, setting the exup at multiple locations, my bike is still running crap, it runs on and off, like when i rode it to work this morning, it was awesome, ran really nice the whole way there, when i rode it home, it ran really bad the whole way home! i dont understand! could the source of my problems be the ingition module? or the pickup for the ignition module? is there anyone in western australia willing to let me plug theirs into my bike and see if it fixes the problem? or does anyone have an ignition module for sale in good workng condition?
whats the condition of your battery?? you would be surprized at the difference a new battery can make i had a similar problem with a fzr 400 the new battery cured it of everything no misses,coughs ,splatters and no hissy fits!!! without doing anything else to the bike.
im not 100% sure, the bike starts fine? do you know what sorta volts/amps the battery should be reading? im also wondering about the pickup, the issue could possibly be caused by heat, when i rode the bike to work this morning at 7 oclock it was quite cold, ran great, this afternoon it was hot, ran like crap, ive often found riding it when the temp is cold it runs better? is there anyway of testing the pickup without having one of those thingographs?
an older battery will put more load on the charging system and less on ignition system cold air is thicker than hot air so maybe you should check the condition of your air filter and perhaps check the mixture screws. this is the way i do the mixtures, let the bike warm up then adjust each screw until the revs are at the highest RPM i.e turn them in, then back out, then back in until you find the highest RPM in each carb do them from 1 to 4 a couple of times, that allows for different compresion and carb condition. also adjust the exup
guess ill have to do a plug cut and see whats happening, the air filter isnt that good, but it still runs bad with the box off, so doesnt suggest to me that would be the problem, the battery doesnt hold its charge super well, coould be the problem but talking to an electronics engineer friend of mine he recons that if there was problems with the pickup or ignition it would be worst under heavy load or high revs, which makes sense... guess ill have to do a plug cut... there is a tiiny bit of surface rust, not much at all in the tank, that wouldnt be the cause? ive also heard something about fuel taps?
If you know that battery is borderline, replace it. The Yamaha line of sportbikes do not work well with a weak battery.
Mine was like that and it turned out to be the coils. I used coils from a FZR1000 and now runs very well indeed
well i did a plug cut and it didnt really tell me muchthey werent white so it isnt running lean, they were a little black, but not realy much carbon deposits, only got a little carbon on one of the plug cuts, werent wet, didnt really tell me much... another strange thing it does is when you try and take off and its running badly if you dont give it heaps and heaps of continual revs, up over 6, it boggs down, and chuggs, and then when you hld the clutch in and try and rev the engine you have to hold the throttle wide open and it just wont rev, that was the only time i got that bit of carbon, it would have to be hellll rich not to want to rev out?, even slowly? hrm coil and battery, battery is easy to replace, probably worth doing anyway if the coils were faulty would you expect it to run worse as the revs got higher?
Coils are cheaper than battery (Coils in UK are £25 a pair 2nd hand). Borrow some off any FZ/FZR to test... they all do the same thing. at least clean the LT side connectors Mine would not take off with the old coils on without a heap of throttle and revs.
sounds like it might be the way to go, how did it run in the upper rev range before you replaced the coils?
well found two potential problems, the charging voltage is only reaching around 12.5-8 volts, and was fluctuating, also checked the thermostat (was thinking maybe the thermostat wasnt opening and causing fuel to vaporise in the carbys, and it turn out the thermostat wont open until about 98 degrees c, (did the old boil test with a thermometer) do u rekon the charging problem is the voltage regulator or the (stator?) coil? anyone know if new parts are buyable? southerncross sports has no parts listed for the fzr <!-- s --><img src="{SMILIES_PATH}/icon_sad.gif" alt="" title="Sad" /><!-- s -->
Not very well. But it was limited testing because I had no documents so was just running it round the housing estate that has speed humps, so couldn't stretch it's legs.
well took the battery out, and it is dead hey, some of the celss had about 2 cm of solution in them, and alot of the cells were like white corroding, and looked like bits were missing and stuff, definately time to replace the battery!!
replaced the battery and it made a huge difference! now it just needs some minor tuning and balancing (my vacuum guages arrived from america yaay! (only took 3 months <!-- s:alcoholic: --><img src="{SMILIES_PATH}/icon_all_coholic.gif" alt=":alcoholic:" title="Alcoholic" /><!-- s:alcoholic: --> )
