Swingarm Brace vs Crossover tube?

Roco22

XS650 Enthusiast
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Had the swing arm (wiseguy) braced up/powder coated and installed.

Neither mech or I foresaw the exhaust crossover issue….

Now what? I wish to keep bike as stock as possible...

Remove the new brace… or remove the crossover tube and patch the mufflers?

How important is the crossover tube? ……….

Yes I’ve read until I’m blue about the pulses....sonic and otherwise.

Shouldn’t crossover be located between the headers?.......Jus axing.

Thanks in advance for your considered on point suggestion(s).
Swing arm 01.jpg cross.jpg XS650Ricks.JPG
 
How long ago did you have Joe Wiseguy`s do this brace? I looked on their website and nothing came up under swing arm brace and extensions? Looks like intakes and exhaust is about all he has to offer. If you ever decide to sell this I might be interested.
 
Cut the tube and plug, do it in such away it can be rebuilt if wanted. never had the experiance of the difference on the same bike. A friend has a C and had a set of aftermarket C-F mufflers without the crossover. Found a set of NOS C-F mufflers with the crossover, and without any other changes to the bike, he said it ran better and seemed to smooth out the rough edges..............he rode the bike to work every day so definatly had recent riding as a gauge.
 
Had the swing arm (wiseguy) braced up/powder coated and installed.

Neither mech or I foresaw the exhaust crossover issue….

Now what? I wish to keep bike as stock as possible...

Remove the new brace… or remove the crossover tube and patch the mufflers?

How important is the crossover tube? ……….

Yes I’ve read until I’m blue about the pulses....sonic and otherwise.

Shouldn’t crossover be located between the headers?.......Jus axing.

Thanks in advance for your considered on point suggestion(s).
View attachment 93782 View attachment 93783 View attachment 93784
Cross overs placed up front are well worth the effort in providing better low and mid range
performance. Harley drag racers are now catching on to the benefits of the C/R tube,just google it.
 
At a given RPM, the crossover tube is there to increase velocity of the escaping gasses. The engineers put it where they thought it should be. Preserve the stock exhaust. Buy a Mac.
 
But they didnt think of fork flex? Frame flex? Cut the crossover. Im no iganeir, but wouldnt more edges in the exhaust route impede exhaust velocity?
 
Roco22,

I wouldn't remove the braced swing arm.... its a good upgrade. There are thousands of 650's using a two into two exhaust without a crossover tube.

I would put that stock exhaust system aside and put on an aftermarket system. If you do remove the crossover tube I agree with 650Skull to do it a way that you can put it back together. They don't make those anymore and yours appears to be in great condition. If not yourself, somebody is going to want that someday.

Nice bike.

XStretchified
 
Last edited:
Roco22,

I wouldn't remove the braced swing arm.... its a good upgrade. There are thousands of 650's using a two into two exhaust without a crossover tube.

I would put that stock exhaust system aside and put on an aftermarket system. If you do remove the crossover tube I agree with 650Skull to do it a way that you can put it back together. They don't make those anymore and yours appears to be in great condition. If not yourself, somebody is going to want that someday.

Nice bike.

XStretchified
I'm not a mech...so humor me....
Leaning towards elimination of the crossover...
What about a flexible crossover tube?
Something like a washing machine hose but larger diameter.
mesh.jpg
 
How long ago did you have Joe Wiseguy`s do this brace? I looked on their website and nothing came up under swing arm brace and extensions? Looks like intakes and exhaust is about all he has to offer. If you ever decide to sell this I might be interested.

Within last month or so...He sent it to me and I had it welded and powder coated.
He's around, I called him about this issue today
 
Interesting idea. You'll have the most flex using a heat tolerant hose that matches the diameter of the inner crossover stub and welding a threaded bushing into the outer crossover stub. You could also use rigid tube if you bend down from the stubs and across. How much deflection do you need? Can't tell from your pictures.
 
Interesting idea. You'll have the most flex using a heat tolerant hose that matches the diameter of the inner crossover stub and welding a threaded bushing into the outer crossover stub. You could also use rigid tube if you bend down from the stubs and across. How much deflection do you need? Can't tell from your pictures.

Dunno yet, gonna run this past my mech & welder (son in law).
 
I'd never cut a good stock 78 exhaust! Though the modified swing arm looks great., I'd consider a TX750 swing arm for two up riding which is what you are after ? Hence backrest search ?
 
But they didnt think of fork flex? Frame flex? Cut the crossover. Im no iganeir, but wouldnt more edges in the exhaust route impede exhaust velocity?
NO,the balance tube's job is to aid in balancing out the imbalance pressures of the cylinders to enhance
scavenging which in return boost low and mid range performance and lowers exhaust tone.
 
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