hey everyone i have a question about my bike its a 99 cbr 600 f4 it has about 30k miles it has aftermarket scorpion exzaust raceing clutch and the carbs have been jetted i have not had any problems out of it intill recentley it has a new battery also when the bike is sitting in idle and u pull in the front break lever it trys to die and the lights get really dim
when u are driving sometimes and try to get on it in any gear it bogs and pops if u hang in there it will clear up though but also it starts doing it when u hit the bright lights????? any idea the carbs were also just cleaned and jetted

 

Sounds like an electrical problem to me, you might want to disconnect the headlight and run it like that just to see if there's too much strain on the system

 

what is your idle speed? It should be 1300 rpm.. if it is way lower the charging (marginal already) system will not be able to keep up..

 

thanks for the responce guys the idle was around 2000 rpm i turned it down today to about 1300 1400 now when it is idleing the rpm gauge rumps around it will drop to zero then go back up does anyone know if it has a voltage reguliator??? maby thats going bad

and a new question the bike has 31k miles on it and i do here some valve noise is this normal or do i need to take it in and get them adjusted riding and power wise its the same still strong

 

dude i have the same problem minus the whole light thing. I have a Ignition ??? ( to late cant remember name. Thing inside of right crankcase) Coming tomorrow and ill let you know if it works

 

alright cool ya its really starting to bug me lol talked to someone yesturday and they said that when u are driving and it bogs that its loseing 2 cylenders and def electrical its weird this whole week its been fine though

 

Start with a multi-meter on ur battery. With the bike off the battery should read between 13 and 13.2 volts. If its under 12.3v, the battery is undercharged

If its a new battery and your voltage is down, chances are its your stator or your voltage regulator/rectifier.

Start the bike and check the voltage at idle then rev the bike to 5000rpm the voltage should not go over around 14 volts, and should come back down if the voltage regulator is working properly.

Go for a ride and check the voltage on the battery once the bike is off. should be back to around 13v.

hope this helps

 

thanks guys will do try it today and keep everyone posted. Thanks

 

Ignition pulse generator <<<<<<<< thats the name !!!!! I was in the middle of putting it back together. I broke a bolt in the case so i stopped cursed and went in the house.................................

 

Use an easy out on that bolt. That always sucks. The ignition pulse generator just tells the bike when to fire. Very unlikely to be the cause but possible. I would do the charging system tests like suggested. More likely to be stator or regulator/rectifier. Also check and make sure you battery connections are tight and any ground wires bolted to the frame is tight and clean. Look for any wires that may have rubbed on anything or gotten hot and melted the coating away leaving bare wires able to goto ground.