gsxr 88 750 exhaust on gs 1000 1979 ?

[62 bugzilla]

I think the gsxr exhaust fits a gs 1000 1979 and long as the gsxr is a early aircooled model but unsure if the 1100 and 750 are the same size and both work for a gs 1000 1979? I'm buying my first gs next weekend and ready to start working on it. Any help would be great.

[BassCliff]

Greetings and Salutations!!

Hi Mr. 62 bugzilla,

I can't speak to your exhaust issue. But the next couple of links should prove helpful. I just stopped by to welcome you to the forum in my own, special way.

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Thanks for joining us. Keep us informed.

Thank you for your indulgence,

BassCliff

[gmansyz]

GSXR Headers

It could fit if it's an A/O 1100. The 750 is a little short. Like 3/4" so I am extending mine and using a different collector.
G

[posplayr]

It could fit if it's an A/O 1100. The 750 is a little short. Like 3/4" so I am extending mine and using a different collector.
G

Are you holding out on the pics? I need to shorten a set of GSXR 1100 header and I need someone else to blase the trail.

[posplayr]

It could fit if it's an A/O 1100. The 750 is a little short. Like 3/4" so I am extending mine and using a different collector.
G

I guess I should add, the 1st Gen 1100 is shorter than the 2nd Gen 1100, both of which should be longer than the 750's. Bear in mind there was a stroke change in the 750 in 2nd Gen so proportion between 750/1100 may not always hold.

[Billy Ricks]

The only bikes the GSXR pipes fit properly are the '83 and up 700/750E models. Even then they may not work with the stock pegs. They share the same port spacing and port diameter. The rest of the GS line has larger ports so you have to address that if you want to use a Gixxer based pipe.

[rapidray]

The rest of the GS line has larger ports so you have to address that if you want to use a Gixxer based pipe.

The ports aren't larger on the GSs, just the OPENING where the pipe slips into the head is bigger on the GSs. If you just center the GSXR pipes in the openings when you install them, there will be no problems. Keep in mind that the GSs have a wider bolt patern than the GSXRs so you will need to slot the bolt holes in the GSXR pipes to put them on a GS. Other than that no real problems other than making the rear hanger bracket. I hope this helps. Ray.

[Billy Ricks]

The ports aren't larger on the GSs, just the OPENING where the pipe slips into the head is bigger on the GSs. If you just center the GSXR pipes in the openings when you install them, there will be no problems. Keep in mind that the GSs have a wider bolt patern than the GSXRs so you will need to slot the bolt holes in the GSXR pipes to put them on a GS. Other than that no real problems other than making the rear hanger bracket. I hope this helps. Ray.

Thanks for clearing that up Ray. It's what I really meant, just put the wrong way.

Some people have made sleeves and such to deal with the difference in pipe size. Depending on the bend of the midpipe pegs can also be an issue.

[rapidray]

I figured as much Billy! Have a good weekend my friend, Ray.

[gmansyz]

GSXR Header

Okay POS, here are a few fotos. Hopefully, it works. There are also spigots for the GSXR Head.
Now, a few notes. Did you know that Busa headers are very similar to the GS? The spigot is the correct O.D. but the flanges has the bolt holes a little clsoe together. About .110". Oh, port spacing is different but could be easily tweaked as the tubing is mild steel. Also, the '07/'08 GSXR also has the same the same spigot size along with the bolt holes as the Busa so it could be coaxed to fit a GS if you fix the spacing and can weld Titanium. Now I have a few ideas.
Also, I was thinking to change the flange on the GSXR header and just slip some larger tubing over the spigots and weld a little to help center the spigot in the port. But now may run the GSXR750 head as I am needing a whole '82/'83 GS11 head.
Anyway, does any of this help?
Laters
G

[gmansyz]

GSXR Spigs

Okay, only one foto at a time so here is the spig foto.
G

[62 bugzilla]

thanks

All this info does help and gives me some options. I'm a fabricator for fun and can do the modifying part without a problem and could build my own but want to wait to build an exhaust for when I turbo it which will be a little bit. I just wanted something to get me by while I do the other mods to the bike over time and at the end I will do the motor and turbo stuff. I've built alot of street cars and offroad stuff when I lived in california but since I moved to wisconsin I think I'm safe enough here to get a street bike . (in so. cal. it was not a smart idea to have a street bike) . Heres a picture of my offroad baja bug I built and recently sold to show you some of my fab expereince. I've always like crazy things and I'm sure the bike will end up there aswell.

[gmansyz]

?

I'm from SoCal too and it's not that bad. Though you can ride nearly year round, here, it's worse.
Okay, nevermind.
Laters
G

[posplayr]

Okay POS, here are a few fotos. Hopefully, it works. There are also spigots for the GSXR Head.
Now, a few notes. Did you know that Busa headers are very similar to the GS? The spigot is the correct O.D. but the flanges has the bolt holes a little clsoe together. About .110". Oh, port spacing is different but could be easily tweaked as the tubing is mild steel. Also, the '07/'08 GSXR also has the same the same spigot size along with the bolt holes as the Busa so it could be coaxed to fit a GS if you fix the spacing and can weld Titanium. Now I have a few ideas.
Also, I was thinking to change the flange on the GSXR header and just slip some larger tubing over the spigots and weld a little to help center the spigot in the port. But now may run the GSXR750 head as I am needing a whole '82/'83 GS11 head.
Anyway, does any of this help?
Laters
G

Thanks,
I was wonder weather a 2nd Gen 750 might not fit pretty well. The 2nd Gen 1100's seem to be way to long. What is the OD of that down pipe?

I ended up with 4:2:1 2nd Gen GSXR 1100 using the spigots to clear the frame cross bar.

http://www.thegsresources.com/_forum/showpost.php?p=1049284&postcount=68

Jim

[gmansyz]

Gen.?

Okay Jim, you lost me on this Gen. stuff. As I always thought there is the Air/Oil cooled engines and then the water wonders.
750 from '85 to '92 but continued on in the Katana series.
1100 from '86 to '92 and also continued in the Bandit series.
Now the '88-'89 750 had a much shorter stroke than the rest. I believe the block height is maybe 1/4" shorter than the long stroke 750?
Now the water cooled 1100's from '93-'98 are taller than the air/oil 11's. Maybe this is what you have? Even the oil pans are different.
Now upon looking at my stuff, I am considering using a Busa stock header and modifying it for another project along with modifying the flange holes. Spacing is off, but a little tweaking could make it work.
Any other thoughts to all this?
Laters
G