FZRSupport: the FZROnline Archive

well here it is i bought this bike from a buddy it was running before he parked it 2 years ago.. when i got it their was no gas in the tank not sure if any in carbs so put fresh gas in it changed plugs, the old ones were still fine but hell y not right. new batt tryed to start wont start, checked fuel pump its pumping. i do believe its getting some gas bc when i try to start it she back fires but not consistently. tryed starting fluid does the same thing tryed spraying gas in carbs still the same. i have spark in all cylinders its a Orange color spark. um yea this it for now let me know what you guys think

well i just finished cleaning the carbs looked like a little bit of rust or rust colored fuel was in a 2 of the bowls every jet was clear and clean. but did notice when removing the carbs on cylinder # 2 the clamp was not tight and black silt was caked on carb 1 and 2. so ill be putting them back on tomorrow. but i dont think that this was the problem. iv been reading alot about this but no definitive answer would a bad voltage reg cause the bike not to start

Compression check? Are the ignition coils in good nick?

A couple of squirts of oil into the cylinders V.I.A the spark plug holes will help if its a compression problem (piston/rings) wont help if its corroded valves/seats though.

the coils are fine i dont thinks its a compression problem... is their a crank sensor on the bike i mean the cdi has to know some how where the pistons are in order to fire right, right. and if so if that is bad would the bike still fire but off timing. i have the carbs off right now and looking down the ports i can clearly see the intake valves and they look brand new not a spot of carbon on them. i know thats not the right way to check them but a visual ins shows that they are clean and seating properly dont know about the exhaust valves. ill be checking the compression this coming weekend but i feel as if it maybe a electrical problem. u know sitting out side for a year.. let me know what yea think

These bikes are TCI not CDI. ReelRazor and a few other can give a better explanation of the differences.

What are the valve clearance(s). Back firing on thse TCI motors could indicate an open exhaust valve when the coil fires on the waste stroke and in essence is using the exhaust system as the combustion chamber.

By your motor firing and back firing you have gas, spark, compression and timing. Your valve clearances may be out of tolerance which again is a sysmptom of hard starting.

How many miles are on the clocks? Whe did your buddy do the last valve shim job?

Razor where you at you have a much explanation of the TCI system than I.

CDI - Capacitor Discharge Ignition, a capacitor is charged up and then dumped through the ignition coil - fast, sharp hot spark, resists fouling, less affected by battery levels, often requires more components / complexity. Positive pulse from CDI to low-resistance primary ignition coil to ground.

TCI - Transistor Controlled Ignition, basically an electronic version of Kettering Points system used since 1913-ish. +12vdc ALWAYS applied to high-resistance primary ignition coil. TCI box grounds power for a few milliseconds each cycle, allowing current to flow; this generates a magnetic field in the coil core. When the TCI shuts the current off at the appropriate moment, the mag field collapses, inducing a big voltage in the secondary side of the coil. Very simple, but much more finicky in power requirements. Weak battery can cause hard starts; voltage drop in system due to cranking can leave the ignition system with nothing to use to make sparks.

well just downloaded the repair Manuel if any one wants a copy give me your email ill send u one

well just checked the pick up coil all is good their checked the tid that all good check the coils those are good also reinstalled carbs sounds like it really wants to start now but no go still

i still wish some one would tell me if the bike will run with a bad vr and if not would you still have spark

trump19 wrote:i still wish some one would tell me if the bike will run with a bad vr and if not would you still have spark

The bike will run depending on how new and/or strong the battery is but it'll be slowly cooking various parts of the wiring system.

I am working on a 89 fzr 600 with a similar problem. I have spark on all cylinders. It will sometimes run good and sometimes not. I checked the vr and the connector to it was burnt. I am working on getting the upgrade for the vr. When I get the new one in I will be sure to post if it solves the problem of it running on three cylinders with spark. The cylinders are all getting fuel and have compression. The strange part it that the cylinder that misses is not the same everytime. When I first noticed the problem it was cylinder two. Now it is cylinder three. If anyone has any ideas please post.

RRead89

if you would can u csend me a copy of the manuel cowboy32480@aol.com thanks fizzer fan

well this bike is going to the shop im not fffff ing with it anymore its driving me nuts i bet they say it needs head work o shit its ganna cost me