Re: FZR 400 rr was this project a mistake ?
Posted: Fri Jul 26, 2013 9:13 pm
I know Boris; you are getting there bit by bit;which is always good.
My reply was more for others reading and adding suggestions.
Chris:
The leaking downpipe will not cause this.
If it gets worse when you put the choke on slowly, a little bit at a time, then you know they are not stuck on and making it run too rich (having too much unburnt fuel-you have this problem now)
If it stayed the same ;the chokes may be stuck on in the start position.
I have just gone back a few pages and saw the mechanic had your bike-I did not know if you had just given him the carbs and you re-fitted them until now.
About 75% of running problems on these are caused by tight valve settings; they wear down as the bike gets older.
You need an experienced motorcycle mechanic to do this ( Compression test) for you. It will cost too much to buy an accurate guage for your one time use and you would still have to learn to use it and interpret the results.
Like Boris states; they are usually hard to start though.
Why not ask the mechanic you used before if he will look at it again and how much it would cost for him to try a few things.? Tell him it is better but still not right.
You may get to fix this yourself with help on here but what usually happens is;
Sooner or later a bike running like this breaks down in the wrong place (is there a right place ?) gets abandoned for a short while and is either vandalised or stolen and you have the grief of getting both you and it home.It is still to fix.
Defeatist attitude perhaps ? ;No I see it happen every day,so will others on here.
Or you get proper sick of it and sell it !
Follow Boris's instruction for checking the exup valve and get back with the results.
Try to work on one thing at a time;if you get distracted with other ideas and symptoms write them down ;then ask.
Too much at once can make the bit you just fixed irrelevent.
Hope this is of some little help.
My reply was more for others reading and adding suggestions.
Chris:
The leaking downpipe will not cause this.
If it gets worse when you put the choke on slowly, a little bit at a time, then you know they are not stuck on and making it run too rich (having too much unburnt fuel-you have this problem now)
If it stayed the same ;the chokes may be stuck on in the start position.
I have just gone back a few pages and saw the mechanic had your bike-I did not know if you had just given him the carbs and you re-fitted them until now.
About 75% of running problems on these are caused by tight valve settings; they wear down as the bike gets older.
You need an experienced motorcycle mechanic to do this ( Compression test) for you. It will cost too much to buy an accurate guage for your one time use and you would still have to learn to use it and interpret the results.
Like Boris states; they are usually hard to start though.
Why not ask the mechanic you used before if he will look at it again and how much it would cost for him to try a few things.? Tell him it is better but still not right.
You may get to fix this yourself with help on here but what usually happens is;
Sooner or later a bike running like this breaks down in the wrong place (is there a right place ?) gets abandoned for a short while and is either vandalised or stolen and you have the grief of getting both you and it home.It is still to fix.
Defeatist attitude perhaps ? ;No I see it happen every day,so will others on here.
Or you get proper sick of it and sell it !
Follow Boris's instruction for checking the exup valve and get back with the results.
Try to work on one thing at a time;if you get distracted with other ideas and symptoms write them down ;then ask.
Too much at once can make the bit you just fixed irrelevent.
Hope this is of some little help.