Exhaust for the 1982 GPZ750-R1

ive been looking online for a new 4-1 for my bike, but its hard to tell if a set will actually bolt on to my bike or not. will systems made for the KZ750 of the same period fit without problems? i there are some mac 4-1`s on ebay, but i dont like the look of them.. would like something like a kerker.. but not pay the price for one..

Anyone got any tips? dont want to mod a system from a different bike to fit.

No eBay APP ID and/or Cert ID defined in Kunena configurationThis guy is higher than a kite if he thinks he is going to get this much for his sale, but it is a rare Moriwaki Exhaust System.

From what I have heard fro owners of a MAC System, stay away from them. Used bike that already have a system on them could be another choice. There are street systems and race systems. Race systems are tucked under the engine for clearance, and will need to be removed to change the oil filter.

These are just a few of the ones out there.
Kerker
Bassani
Yoshimura
Supertrapp

The 750E systems are slightly different in how they hang the muffler. I know because I have a NOS Supertrapp system for a GPz750R1 and it doesn't fit on my '81 750E2. Some systems can be easily adapted and others can't. Depends on how low the muffler hangs and the type of bracket used for the muffler.

I just bought the Delkevic downpipes for my Gpz750R1, They are 159 GBP and I figure I will have to go from there on my own.
They have a complete system for the KZ750L1-3 for 256 GBP and it cant take a lot of mods to get them to fit the R.
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Alittle moore googling found a italian manufacturer called MARVING and they have a few quite nice systems for the 82 GPz 750. So im thinking about trying out the 4-1 "master" or the 4-1 "Racing" they are pretty affordable too

scubaanders wrote: I just bought the Delkevic downpipes for my Gpz750R1, They are 159 GBP and I figure I will have to go from there on my own.
They have a complete system for the KZ750L1-3 for 256 GBP and it cant take a lot of mods to get them to fit the R.
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The box for the Supertrapp system I've got suggests the '82 GPz750 and the KZ750/700 L-model bikes both take the same system. I believe the difference between these and the regular KZ750E system is the triangular muffler hanger brackets are different.

All with you there Nessism. The L is as far as I know basicly the same. Guess a look at the parts diagram can settle that.
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scubaanders wrote: All with you there Nessism. The L is as far as I know basicly the same. Guess a look at the parts diagram can settle that.
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More or less...the two models are certainly similar...however, if you ever purchase aftermarket 'case savers' they mount completely differently and are not interchangeable.

Mcdroid wrote:

scubaanders wrote: All with you there Nessism. The L is as far as I know basicly the same. Guess a look at the parts diagram can settle that.
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More or less...the two models are certainly similar...however, if you ever purchase aftermarket 'case savers' they mount completely differently and are not interchangeable.

Not sure what the deal is with the engine mounts. Looks like both the l's and the R1 use the same rubber engine mounting parts in the front. The L model seems to have some added frame brackets under the engine though. At any rate, I think the exhaust systems mount similarly if not the same.

Here is are some photos showing the Supertrapp header instruction info. Note that all the KZ750 bikes use the same header, but the muffler/mid pipe sections vary, and the R1 and the L models use the same part number

P1020828 by nessism , on Flickr

P1020829 by nessism , on Flickr

P1020834 by nessism , on Flickr

Sure thing.
The R1 and L3 has the same engine mounts among a lot of things.
What’s most interesting in this case are the STAY,MUFFLER,LH (Ref # 35011-1121) and STAY,MUFFLER,RH (Ref # 35011-1122) basically the plates that supports the original exhaust and the passenger foot pegs.
The right hand side plate is most commonly used to anchor aftermarket 4-1 exhaust megaphones.
I will not be a witness for all brands, but I know for sure that the Vance & Hince and Devil exhaust use that plate for the rear mount, as I went through a number of those during my track days.
Anyhow, the part number for these plates are the same on the R1 and L3 therefor it will be most reasonable to assume that a exhaust from a L3 will fit a R1. I will not commit seppuku if I am wrong, but one thing is for sure, the E model exhaust will not be a direct fit as these plates on the E has another part number.
But if worst comes to worst, Stein adjust the holes a little.

GPZ750R1 Part diagram


Z750L3 Parts diagram


Details:


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