Gs1000 exhaust to Gsx750E?

[riude]

Hello.

After some searching from site, I understand that GS1000 exhaust would fit to GS1000E?

Which makes me believe it would also fit to my GSX750E? Minor modifications are not problem.

If they fit, any ideas how does such swap affect to engine performance? Is it possible I need do some jetting etc? Which I absolutely don't want..

I have now "working" aftermarket 4-1, but it's rusty, allready patched sometimes and sounds quite bad,  I think theres not much material left inside.

I could get this kind of GS1000 exhaust for reasonable price,thats why I'm interested

[Fazz711]

Almost all exhaust swaps require some jetting to get optimum performance. 

Some may be close enough to run OK Ish but not spot on. 

A lot of gs and gsx exhaust are similar and will fit with a bit of work. 

Usually on the hangers at the rear. 

 

[TonyGee]

ive swapped the exhaust systems over on my GSX1100 and GSX750 with no problems, maybe just a slight mod to the hanger. 

[riude]

Ok, just called seller and bought it. We'll see later how it fits.

[riude]

Blah, does not fit.

 

Now distance between outer sides of downpipes 1&4 is about 35cm (I didn't remove it), and on this "new" it's only 33cm.

[riude]

Also, there's big difference between 1&2 and 3&4.

So, as it is 4-2-1, its not suitable even for blank to be modified. Damm, lost money.

Could someone verify this is GS1000 exhaust? See pic attached. Downpipes are 35mm.

[TonyGee]

so if ive read it right ???????  they are out about 10mm ish ?  if thats all then i'd be doing a bit of pulling and pushing to get them lined up. done this before with no issue.  I tried a set of bandit headers on my GSX750  and needed to pull the pipes in a bit to get them in the ports but the collector didn't clear the sump 

[riude]

Hmm...

1 and 4 should be pushed totally about 20mm apart.

Because of 4-2-1 structure, that would fix also problem with dimension difference between 1&2 and 2&4. Not exactly, but quite close.

And I think I can stretch that 20mm and still have port-end of pipes perpendicular.

BUT, after that 1 &4 and 2&3 are way out of line, see pic below, green line.

And lining all of them AND keeping them perpendicular and same lenght can´t be done just pushing/pulling/bending. As fas as I understand.

Heating and bending or cutting/tig welding? Anyways quite big job. Worth of it? Perhaps not.

 

I don´t know, but I guess tolerance for pipes perpendicularity to ports is quite tight?

 

[wraith]

Have you tryed fitting it to the bike?

Or just getting hung up on them being mm precise.

[riude]

I have, now.

Not a chance, it would be easier to your own from straigh pipe.

 

[wraith]

Yep, that don't look right

[TonyGee]

are you sure the exhaust is for a GS1000 ?  from the pic's it looks more like a GS550 !!!!! 

[riude]

Nope, I'm not sure. It was sold as gs1000, but is it really such?

I asked earlier, if someone could verify it, by dimensions on picture.

[riude]

I needed to stretch 1 and 4 totally 30mm to make it fit. Huge difference.

If someone gs1000 owner could take measurement from outer sides of downpipes 1 and 4. It can be done with metal ruler easily from bike.

Why? If it's obviously not gs1000, i'll ask  refund from seller.

[denisd]

350mm outside measurement

[riude]

Thanks. It's same on gsx750e.

So, this exhaust is from smaller bike.

[TonyGee]

40 minutes ago, riude said:

Thanks. It's same on gsx750e.

So, this exhaust is from smaller bike.

yep thats what im thinking !!!!  I know the gsx750 and gsx1100 are the same, so i would of thought the gs1000 would be very similar ??????  

[BrianUK]

350mm outside to outside measurement on my GS750 too, if that helps.

[TonyGee]

looks like gs750 up to gsx1100 they are 350mm so its defo looking like its off a smaller bike.