cbr400rr nc29-carburetor settings

[archeo14]

Hi,i have cbr400rr nc29 1995 model.
Therefore i get dry fouling on my spark plugs within every week,cause of this my bike wont start n get problems...
Added i need its carburetor settings also cause i think my carbs getting more fuel n going in dry fouling...

Please help me!

[Davez29]

Hi and welcome.

Someone may move this to the CBR section for a better reply, but in the meantime if you can clean your carbs and search out a copy of a Haynes manual this will be a good start. the mixture screws should be 2&1/4 turns. If its an R model, 1994 0nwards, jets will be 106. But if you dont have a standard exhaust set up it may be higher, such as 108s. Also try a new air filter or if its K&N clean it, make sure you have no leaks on your carb rubbers and air filter.

[archeo14]

Thanks for ur kind reply..
2 1/4 turns means i dont understand it properly unless you show me in image form..
I put new air filter and iriduim ix spark plugs 6days back n now i m not able to start it due to extra fuel getting burn n coating on spark plugs that leads to not starting n so on...
Thats why i want to set my carbs to fine setting with your all helps

Added i have scorpion exhaust current.

[archeo14]

SOME BODY HELP ME...

[gullarm]

2 1/4 turns - you wind them in all the way to the stop, then you turn them back 2 times then a 1/4.

Make sure you remove them 1st and check the rubber washer ( or o-ring ) is in good condition ) My settings were all over the place, after setting correctly it ran like a dream.

[dunkenb]

On the side of the carbs nearest the engine , if you look underneath you see a single brass screw ( one on each carb)
It adjusts the fuel/air ratio . Screw it in less fuel , screw it out more fuel.
From fully screwed in you turn it out 2 1/4 turns. (If you put a K&N filter on you'll need to adjust the mixture slightly.)
Also if you remove the brass screw completely there'll be a spring , a washer and a little rubber "O" ring behind it.
The o ring can perish.

[archeo14]

What is 106 and 108s....
Yes its R model cbr400rr n year is 1995.

Please do reply...
Thanks..

[archeo14]

Thanks for all ur kind n helpfull replys...i made settings u all said so...lets see,this time how many days its lasting...
Thanksz everyone,ill b putting updates! N please be in touch!!!!

[Davez29]

What is 106 and 108s....
Yes its R model cbr400rr n year is 1995.

Please do reply...
Thanks..

106 is the standard main jet size in the carbs and 108 is the next size up, usually put in if you have any aftermarket exhaust parts or a k&n filter.

[archeo14]

Thanks so much...