exhaust, cross over necessary?

I am trying to make one good kz650 from 2 bikes. In removing the stock exhaust to put it on the other bike, I broke off the crossover pipe from one side. The metal was extremely thin where it broke. My question is can I remove the cross over all together and get the exhaust welded up. What will happen without a crossover? Will I notice much difference in the way it runs?
Any help will be appreciated.
Thanks,
Saltydog

You might be able to have one made at a muffler shop by cutting off each end then welding a new piece in , if you did weld up your pipes with out the cross over I am sure it would still run ok ,, I think the cross over is used to equilize the exhaust pressure between both pipes ,,

You bike will run fine without the cross over. The crossover pipes helps primarily for top end power. I suppose it depends on how you like to ride.
KZCSI

KZCSI wrote:

You bike will run fine without the cross over. The crossover pipes helps primarily for top end power. I suppose it depends on how you like to ride.
KZCSI

I've noticed that some after market 4 into 2 headers don't have a crossover. So, what about those?

- Nate >>

You don't need a crossover when the firing
interval is equal for the connected pipes.

On a kz1000 this would require one side
connected to 1 and 3 and the other to 2
and 4.

This setup sounds GREAT.

-Duck


meant to say you don't benifit from a crossover
when connected as above...

Post edited by: Duck, at: 2006/03/19 20:05

Hey NonB,
The original manufacturers, (Kaw, Honda etc.) are trying to keep noise to a minimum. Now smaller exits don't necessarily correlate with less noise but they help, as does providing as much volumn as possible within the system. Given the smaller size of stock exits, the ability to allow a higher reving engine to breath through more exits is one of the benefits of a cross over pipe.

Aftermarket manufacturers are not so concerned with noise emissions. (I'm sure that all those bikes with four into two collectors that you're refering to are exclusively off road machines, aren't they?) They typically build exhaust systems that are shorter, louder and lighter than the stock systems they replace. Take a look, I'll bet you agree that their orfices are larger. Hence no need to share.

KZCSI