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4-1 exhaust for an '83 gs750es?

  • Thread starter Thread starter Anonymous
  • Start date Start date
the system is called pro series supersport mine was bought through denniskirk but they dont have it anymore i tryed to get on yoshimuras site last night with no luck but will keep trying it will also work on my rides 80gs850/81gs1000/1100
 
hey collin check under parts for sale in this forum. look at 1982-1983 katana parts for sale that might be one that will work
 
The '83 GS has smaller exhaust ports than the Kat. The Kats and other pre '83 750s had the same size ports as the liter class bikes.
 
You can already squeeze a 4.5" GSX-R wheel in your stock swingarm. That will hold a 160/60 tire.
Click to expand...
Do you have to do anything special to make this work, or is it just a matter of putting the wheel in? Thanks
 
I am using the Gixxer rotor, caliper, and sprocket. I am using Katana 600 spacers on each side, and Katana caliper hanger. I am using stock GS axle with stock bearings installed in the wheel. There is a bearing support between the sprocket carrier and hub which is Katana 600. The bearing support inside the wheel hub is my stock piece with a small length of pipe J-B Welded to it so it ends up the same length as the Gixxer piece. The brake torque has to be bent to clear the tire and moved to the bottom of the swingarm. It is a tight squeeze on my bike between the swingarm where the axle fits. I used a hydraulic jack to spread the swingarm a little for about 1/4" more clearance. I think that about covers it.
 
mattdez said:
V&H makes a good pipe for the 83's. But they are megaphone stye. BUT, if you want, the pipes from an 81 750 will fit if you grind them down a bit. If you find just a header seaction cheap, I have the rear section from an 81 that I am willing to part with.
Click to expand...

I just aquired an 83 GS750ES and I was wondering if anyone has actually modified an 80-82 V&H competition pipe to fit an 83-85 750ES and what modifications were needed. I'm not sure how this pipe would mount in the rear of the bike, or if I'd be able to keep the centerstand. I'm rebuilding this bike from the ground up and any help in this matter would be appreciated.
 
BillBBB said:
mattdez said:
V&H makes a good pipe for the 83's. But they are megaphone stye. BUT, if you want, the pipes from an 81 750 will fit if you grind them down a bit. If you find just a header seaction cheap, I have the rear section from an 81 that I am willing to part with.
Click to expand...

I just aquired an 83 GS750ES and I was wondering if anyone has actually modified an 80-82 V&H competition pipe to fit an 83-85 750ES and what modifications were needed. I'm not sure how this pipe would mount in the rear of the bike, or if I'd be able to keep the centerstand. I'm rebuilding this bike from the ground up and any help in this matter would be appreciated.
Click to expand...
Which pipe is the Competition pipe? Because I have an 80-82 pipe on my 83 GS750E... but not sure which one it is. BTW, I don't think with any pipe you can keep the centerstand because they pass directly under the bike.
 
mattdez said:
BillBBB said:
mattdez said:
V&H makes a good pipe for the 83's. But they are megaphone stye. BUT, if you want, the pipes from an 81 750 will fit if you grind them down a bit. If you find just a header seaction cheap, I have the rear section from an 81 that I am willing to part with.
Click to expand...

I just aquired an 83 GS750ES and I was wondering if anyone has actually modified an 80-82 V&H competition pipe to fit an 83-85 750ES and what modifications were needed. I'm not sure how this pipe would mount in the rear of the bike, or if I'd be able to keep the centerstand. I'm rebuilding this bike from the ground up and any help in this matter would be appreciated.
Click to expand...
Which pipe is the Competition pipe? Because I have an 80-82 pipe on my 83 GS750E... but not sure which one it is. BTW, I don't think with any pipe you can keep the centerstand because they pass directly under the bike.
Click to expand...

Your bike is basically like mine, except you have a smaller fairing that moves with the bars, right?

The V&H pipe that I mentioned was a 4-1 with a regular style can (non-megaphone). Did you have to make any modifications to have the pipe fit your bike?

-Bill
 
BillBBB said:
mattdez said:
BillBBB said:
mattdez said:
V&H makes a good pipe for the 83's. But they are megaphone stye. BUT, if you want, the pipes from an 81 750 will fit if you grind them down a bit. If you find just a header seaction cheap, I have the rear section from an 81 that I am willing to part with.
Click to expand...

I just aquired an 83 GS750ES and I was wondering if anyone has actually modified an 80-82 V&H competition pipe to fit an 83-85 750ES and what modifications were needed. I'm not sure how this pipe would mount in the rear of the bike, or if I'd be able to keep the centerstand. I'm rebuilding this bike from the ground up and any help in this matter would be appreciated.
Click to expand...
Which pipe is the Competition pipe? Because I have an 80-82 pipe on my 83 GS750E... but not sure which one it is. BTW, I don't think with any pipe you can keep the centerstand because they pass directly under the bike.
Click to expand...

Your bike is basically like mine, except you have a smaller fairing that moves with the bars, right?

The V&H pipe that I mentioned was a 4-1 with a regular style can (non-megaphone). Did you have to make any modifications to have the pipe fit your bike?

-Bill
Click to expand...
Yeah, my bike has the even halfer faring than yours.

As for the pipes:
VHpipes2.jpg

The proper 83 pipe is on the left. The 80-82 pipe is on the right. The older pipe will fit just fine, will even slip right on to the 83 header. The only problem is that it rubs against the rear shock adjustment cables and melts the housing for the cable. But a little automotive heatwrap fixes that right up and it only melts the outer plastic but doesn't affect the inner cable.

These are the 2 pipes I have... It came with the older pipes on it because the header for the megapohone pipe was crushed on all 4 runners. But I found that the slightly better flowing older header will fit if you do a little bit of grinding on it. But just for ha-ha's I slipped the megaphone pipe on and sure enough... it fits. Now all I have to do is get the bike running to see which pipe sounds better to me.
 
mattdez said:
BillBBB said:
mattdez said:
BillBBB said:
mattdez said:
V&H makes a good pipe for the 83's. But they are megaphone stye. BUT, if you want, the pipes from an 81 750 will fit if you grind them down a bit. If you find just a header seaction cheap, I have the rear section from an 81 that I am willing to part with.
Click to expand...

I just aquired an 83 GS750ES and I was wondering if anyone has actually modified an 80-82 V&H competition pipe to fit an 83-85 750ES and what modifications were needed. I'm not sure how this pipe would mount in the rear of the bike, or if I'd be able to keep the centerstand. I'm rebuilding this bike from the ground up and any help in this matter would be appreciated.
Click to expand...
Which pipe is the Competition pipe? Because I have an 80-82 pipe on my 83 GS750E... but not sure which one it is. BTW, I don't think with any pipe you can keep the centerstand because they pass directly under the bike.
Click to expand...

Your bike is basically like mine, except you have a smaller fairing that moves with the bars, right?

The V&H pipe that I mentioned was a 4-1 with a regular style can (non-megaphone). Did you have to make any modifications to have the pipe fit your bike?

-Bill
Click to expand...
Yeah, my bike has the even halfer faring than yours.

As for the pipes:

The proper 83 pipe is on the left. The 80-82 pipe is on the right. The older pipe will fit just fine, will even slip right on to the 83 header. The only problem is that it rubs against the rear shock adjustment cables and melts the housing for the cable. But a little automotive heatwrap fixes that right up and it only melts the outer plastic but doesn't affect the inner cable.

These are the 2 pipes I have... It came with the older pipes on it because the header for the megapohone pipe was crushed on all 4 runners. But I found that the slightly better flowing older header will fit if you do a little bit of grinding on it. But just for ha-ha's I slipped the megaphone pipe on and sure enough... it fits. Now all I have to do is get the bike running to see which pipe sounds better to me.
Click to expand...

You had to grind a bit around the edge of the header flanges to make them fit into the exhaust ports right? I assume you are using a 4-1 pipe as well. Also, did you have any issues with the pipe fit and your oil cooler lines?

-Bill
 
BillBBB said:
You had to grind a bit around the edge of the header flanges to make them fit into the exhaust ports right? I assume you are using a 4-1 pipe as well. Also, did you have any issues with the pipe fit and your oil cooler lines?
Click to expand...
Yeah, the header flanges where a bit too big to fit in the head of the 83 Bike so they had to be ground down. It is the V&H 4-1 header. The interesting thisn is that there wasn't much of a change in the 83 header. The pipes do look very slightly smaller, but they are also made of really thin steel which may account for their looking smaller. I think for the 83 MY V&H decided to get cheap with the pipe they were using. But when placed next to each other you really can't tell much of a difference beween the 2 headers.
 
i have a hindle exhaust system on my '83 750 es and i love it. has to fabricate a bracket to support the rear piece but no big deal. sounds excellent. not too loud. only drawback is having to remove front section to change the oil. but it comes off easily. looks excellent all polished up!
 
youll be hard pressed to find anything new to fit your bike correctly vance stopped making the pipe for the 83-84 750 and 85 700 last spring i know i searched all last year for one so i bought a pipe for a 82 750 and cut the flange off and it fit fine the only problem is mac headers offer little power improvement at all but right now im working on another that should be done when the weather here breaks in cincy ill let you know when im done also for some ideas check out the gallery photos cause there is alot of guys with custom made pipes with pics on the gallery e-mail them and they can give you better insight
 
84gs750

84gs750

I had an 84 gs750e that had a LAZER exhaust, I've never been able to find another one myself but it looked and sounded fantastic so you might want to watch for one
 
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