Bike won't start

[swanman]

Took it for a spin all sweet and back together as it was. I was jus jokin about the rear wheel thing. Well for the moment anyway. I am actualy in the process of moving house now to Dairy FLat, where there is a flattish driveway and a double garage with internal access, so things should be a lot easier than here as I have had to prop the bike up in gravel and crawl around a bush to get at bits of the bike.

Cheers, Fraser (the mechanical GOD)

[aff-man]

Yip told ya it was the plugs if they were black and oily looking it means they were fouled. I have learnt the hard way.... twice.... to keep a bike running every few days.

Glad she is up and running.

P.s. they got the date wrong so we are actually racing the minimoto's again tomorrow... trashman should have all his go fast bits on his so he will crash really good this time

[Zapf]

Ok.......... CLean plugs put it all back together.Check everything looks more or less as I found it. (what a mission to get the plugs, ht leads and other crap back in). Fuel tank on. Press the tit................

Starts first time. Goes straight to idle.

All that's left is to get all the shit back on that I took off and hope there's nothing left over.

After due consideration, not sure what was wrong with it. Dirty plugs? SIde stand switch, jiggling connectors, air lock?? But it works. So thanks everyone. All that with just the tools in the bike kit too.

NExt installment web can amateur mechanics getting the back wheel off with no bike stands whatsoever. Craash

with older electronics and a bit tired. Spark won't be strong enough to go thru the oil and crap that has build up on the plugs... hence your problem. happens with cars too...

next time... if there is next time.... check the plug gap.. sometimes if the coils are tired then gaping the plugs closer will give a cleaner spark and makes engine rev better... but too small a gap will affect power output.

[CBRAero]

In case its of any use, I'll describe my experience gained when fixing up an old CBR 400 Aero which had similar difficulties. This particular bike had problems with a weak spark, fouled plugs and general starting problems. After a couple of weeks I was able to get all the plugs out, clean them, reinstall and start the machine in about 15 minutes!

First point, the engine itself was fine, no issues. The problems elsewhere were manifold however.

1. The charging system. The regulator/recifier unit on these bikes is weak and had partially failed, meaning the battery wasn't charging well (look for about 14 V across the battery while the bike is running). I was getting about 12.5 V, not enough. As a result of a poorly charged battery, the engine would not crank at the required speed for trouble free starts. A heavy duty after market R/R fixed that problem.

2. The ignition system. The HT leads from the coils were old and semi corroded. In with new leads, a move which resulted in a hotter blue spark. Also the wiring to the HT coils needed cleaning and fixing.

3. Carbs. The tank and carbs were full of rust. Relining the tank, cleaning and refreshing the carbs with a Honda kit and then using two inline fuel filters fixed this problem.

Result. Bike starts without a hitch now. Course, I did it up so I could sell it, I'm now looking for a CBR600 F4 or F4i.....

[v.ros`]

Hey all.....
Not sure how old this thread is but im not stuck with the same problem with my cbr600 f4i ,
i m now only gonna try to clean the plugs n then c if it works..... Other then that i went all the way down to removin the nozzle or injector to check if fuel is being sprayed or not n yes i c it is gettin sprayed . Also checked the sparks n yes there is sparks on all 4 ! But still no luck n worse of all is im in the middle of the bush in africa !! With no other cbr600 on site

i have explained my situation in another thread under electrical help so please any help will b appreciated. Please reply on that thread so i can follow easily please.....

Thank u all

[FROSTY:Me]

Vros--think this thing through-- Back to your ABC's
what does an engine need to run?
good enough fuel to ignite -compression,spark,air to breath and all being in the correct timing.
If any of those are missing it aint gonna go