misfire at 10000 revs

speedyvfruk · Post by **speedyvfruk** » Sat Apr 06, 2019 4:24 pm

vfr400 runs perfect up to 10000 rpm then stutters as if starved of fuel....
Bike is a uk version

Emanuel · Post by **Emanuel** » Sun Apr 07, 2019 7:44 pm

Have similar issues, my question is................is it in all gears or just in 6th?

magg · Post by **magg** » Mon Apr 08, 2019 2:32 am

When did problem start.

Post by **NGneer** » Tue Apr 16, 2019 10:46 am

Have you got the little rubber flappy thing (Between airbox and carbs) fitted properly? If not you will get disturbed airflow that makes your bike run like crap....ask me how I know.

speedyvfruk · Post by **speedyvfruk** » Fri Apr 26, 2019 7:28 pm

bike has run like this since purchase

speedyvfruk · Post by **speedyvfruk** » Fri Apr 26, 2019 7:30 pm

Little rubber flappy thing is fitted...
What is the correct route it should take?

magg · Post by **magg** » Sat Apr 27, 2019 10:16 am

May be you need to start with a check of the fuel system ie jet sizes, fuel flow, etc.

Post by **CMSMJ1** » Sat Apr 27, 2019 12:34 pm

is it standard? Air filter, snorkel on the airbox in place etc?
NO point trying to fart about with them - get it standard and it will be wonderful... it's never going to have millions of HP so it needs to work to it's advantages

misfire at 10000 revs

misfire at 10000 revs

Re: misfire at 10000 revs

Re: misfire at 10000 revs

Re: misfire at 10000 revs

Re: misfire at 10000 revs

Re: misfire at 10000 revs

Re: misfire at 10000 revs

Re: misfire at 10000 revs