Author Topic: restricted to unrestricted (Read 3393 times)

Erikkt · « **on:** April 19, 2006, 03:53:29 PM »

Hi!
I've got myself a B4 last week, and it has been a restricted bike (25kW).
The previous owner has removed the four "disks" in the carburettors, but he has done nothing else. Now the bike is coughing a bit when I throttle up. I guess I need to pull the needles up a notch, is this correct? Anything else I need to do?

billybandit · « **Reply #1 on:** April 19, 2006, 05:00:27 PM »

I should imagine balancing the carbs is all that is required

Btw welcome!

Erikkt · « **Reply #2 on:** April 19, 2006, 07:12:57 PM »

Thank you!
I've read about balancing of the carbs in the service manual, but I'm not in the possesion of a balancer gauge. Can it be done without this?

I was under the impression that the engine just didn't get enough gas, and that pulling the needles up a notch would solve this.

Herr Tod · « **Reply #3 on:** April 19, 2006, 07:33:13 PM »

I've done the same, removed the restrictors and raised the needles because it was running lean. Runs pretty good now.

banditcilik · « **Reply #4 on:** April 20, 2006, 04:14:24 AM »

how's the restrictors look like?

Erikkt · « **Reply #5 on:** April 20, 2006, 02:57:56 PM »

Quote from: "banditcilik"

how's the restrictors look like?

It looks like two discs sandwiched together with a spacer, but all in one unit. There are also some grooves in one of the disc on the outer side.

and of course, a hole in the middle...

There are one of those in each carb.

Erikkt · « **Reply #6 on:** April 22, 2006, 07:06:14 PM »

I've now adjusted the needles up, und runs much better, but the idle is crap. It runs very uneven and studders. Can anyone help me?

Thief400 · « **Reply #7 on:** April 22, 2006, 07:11:51 PM »

Balance the carbs now

Erikkt · « **Reply #8 on:** April 22, 2006, 07:24:50 PM »

Yes, that's allready been suggested, but I am not in possesion of a balancer gauge. How can it be done without it?

Red01 · « **Reply #9 on:** April 23, 2006, 10:47:45 AM »

You'll need some kind of manometer. If you can't afford a commercial one (or don't want to pay the funds), make your own.

Po' Man's Carb Sync Tool thread