I am at wits end with my sons bike. 2003 Vn750
I had it up on the lift when my buddy came over and we talked about a small miss at idle.
Unfortunately I decided to try and correct it with my limited knowledge of mechanics. I am getting better though (except for this time).
The bike does have after market pipes with no goats belly. Not sure what type they are.
I decided to eliminate the anti pollution nightmare and removed the lines and capped the ports as described.
The 5/8" line that runs from the breather under the tank was plugged as well. The 1/4" line that runs down the bottom was as well.
I drilled out the caps for the "air" mix.
The bike seemed to run well. Took it for a ride and liked it.
I added some K&N filters and since then I seem to have a lot of backfiring. I have removed the filters and I still get the backfiring.It is only on the left side that has the shorter pipe.
I'm going nut trying to figure this out. He is home for a couple of weeks and wants to ride. Right now i feel like I have blown it and and after a day of messing with it....I got nowhere?
Can it be the filters? K&N says no re-jetting required....sales pitch?
Stock cleaners are toast so re-install is not possible...foam was shot. Bike ran okay before though.
Which is what I will be doing....chugging that is.