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exhaust, cross over necessary?
- saltydog
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19 Mar 2006 09:30 #32494
by saltydog
1981 KZ1000 CSR, 1982 KZ440 ltd, 1972 Honda ct90, 1978 KZ 650
exhaust, cross over necessary? was created by saltydog
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
Any help will be appreciated.
Thanks,
Saltydog
1981 KZ1000 CSR, 1982 KZ440 ltd, 1972 Honda ct90, 1978 KZ 650
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- Shoe48
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- Live each day as it is your last
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19 Mar 2006 11:43 #32534
by Shoe48
Replied by Shoe48 on topic exhaust, cross over necessary?
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 ,,
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- KZQ
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- Walking Behind the Corn May Not Be All That!
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19 Mar 2006 13:04 #32564
by KZQ
www.KZ1300.com
Riders:
1968 BSA 441 Shooting Star, 1970 BSA 650 Lightning, 1974 W3, 1976 KZ900, 1979 KZ750 Twin, 1979 KZ750 Twin Trike, 1981 KZ1300, 1982 KZ1100 Spectre, 2000 Valkyrie, 2009 Yamaha Roadliner S. 1983 GL 1100
Projects:
1985 ZN1300
Replied by KZQ on topic exhaust, cross over necessary?
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
www.KZ1300.com
Riders:
1968 BSA 441 Shooting Star, 1970 BSA 650 Lightning, 1974 W3, 1976 KZ900, 1979 KZ750 Twin, 1979 KZ750 Twin Trike, 1981 KZ1300, 1982 KZ1100 Spectre, 2000 Valkyrie, 2009 Yamaha Roadliner S. 1983 GL 1100
Projects:
1985 ZN1300
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- N0NB
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- Blue handles better
19 Mar 2006 16:01 #32602
by N0NB
Nate
Nates vintage bike axiom: Riding is the reward for time spent wrenching.
Murphys corollary: Wrenching is the result of time spent riding.
1979 KZ650 (Complete!)
1979 KZ650 SR (Sold!)
1979 KL250 (For sale)
1994 Bayou 400 (four wheel peel )
Replied by N0NB on topic exhaust, cross over necessary?
KZCSI wrote:
I've noticed that some after market 4 into 2 headers don't have a crossover. So, what about those?
- Nate >>
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 >>
Nate
Nates vintage bike axiom: Riding is the reward for time spent wrenching.
Murphys corollary: Wrenching is the result of time spent riding.
1979 KZ650 (Complete!)
1979 KZ650 SR (Sold!)
1979 KL250 (For sale)
1994 Bayou 400 (four wheel peel )
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- Duck
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- e vica na i sau na ga
19 Mar 2006 17:04 #32622
by Duck
Replied by Duck on topic exhaust, cross over necessary?
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
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
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- KZQ
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19 Mar 2006 19:29 #32677
by KZQ
www.KZ1300.com
Riders:
1968 BSA 441 Shooting Star, 1970 BSA 650 Lightning, 1974 W3, 1976 KZ900, 1979 KZ750 Twin, 1979 KZ750 Twin Trike, 1981 KZ1300, 1982 KZ1100 Spectre, 2000 Valkyrie, 2009 Yamaha Roadliner S. 1983 GL 1100
Projects:
1985 ZN1300
Replied by KZQ on topic exhaust, cross over necessary?
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
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
www.KZ1300.com
Riders:
1968 BSA 441 Shooting Star, 1970 BSA 650 Lightning, 1974 W3, 1976 KZ900, 1979 KZ750 Twin, 1979 KZ750 Twin Trike, 1981 KZ1300, 1982 KZ1100 Spectre, 2000 Valkyrie, 2009 Yamaha Roadliner S. 1983 GL 1100
Projects:
1985 ZN1300
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