New exhaust for 400 katana

The 1990's Japanese market GSX250SSN (GJ76A) and GSX400SSN (GK77A)
Post Reply
CaptainFothers
Posts: 4
Joined: Thu Nov 15, 2018 7:01 pm

New exhaust for 400 katana

Post by CaptainFothers » Thu Nov 15, 2018 8:10 pm

Hi all,

I recently bought a 1992 400 katana, and it needs a new exhaust. Does anyone do one that'll fit right in, or will I have to buy a custom one. If I have to go custom, does anyone have any recommendations as to who to go to for this job?

Thanks in advance,

Fothers

User avatar
johnr
Club Member
Posts: 3007
Joined: Sun Oct 24, 2010 9:58 pm
Location: lancashire
Has thanked: 266 times
Been thanked: 365 times

Re: New exhaust for 400 katana

Post by johnr » Thu Nov 15, 2018 11:15 pm

mk1 impulse pipe wont fit. mk2 impulse will and has the added bonus of being a nicely made stainless steel 4 into 1 system. bolts straight on with no mods required.
Attachments
kat400.jpg
My Gallery

KOC 004

CaptainFothers
Posts: 4
Joined: Thu Nov 15, 2018 7:01 pm

Re: New exhaust for 400 katana

Post by CaptainFothers » Fri Nov 16, 2018 9:50 am

This might make me sound stupid, but was the MK2 impulse under another name? As when I search for 'Suzuki MK2 impulse exhaust' it doesn't seem to come up with anything useful.

- Will

User avatar
Uncle Bob
Site Admin
Posts: 1667
Joined: Mon Nov 26, 2012 12:05 pm
Location: Norwich, Norfolk
Has thanked: 634 times
Been thanked: 228 times
Contact:

Re: New exhaust for 400 katana

Post by Uncle Bob » Fri Nov 16, 2018 10:16 am

Trouble is as these bikes were Japan market then there are few spares for items that are bike specific in the UK. Looking on Yahoo Japan then there are quite a few but although the prices are not bad initially, time you add on the in between service, postage and import duty it can mount up.

https://buyee.jp/item/search/query/gk77 ... ?suggest=1

Luckily I had a stainless Yoshi on mine when I got it :-)
WP_20150603_14_31_43_Pro.jpg
I also strongly advise, unless it has been done, you get a Viton O ring kit for the carbs from here:
https://litetek.co/Carb_Kit_Suzuki_GSX400_Katana.html
Kit A will do, though Kit B is cheap as well but just for the fuel and choke seals not the Throttle screws / washers (which are a lot of hassle to do).
This will save you pain in the future if you are going to keep the bike and want it running nice (won't it JohnR!) Those carbs are a pain with the ethonol in petrol with OEM O rings and it causes really bad running (same with GSX-R400 of the same period).

Be interested to know how you got on with the exhaust, esp. if you get one made as it would be useful knowledge for the club and future owners (though there are not so many out there).

I think the 400 is a lovely bike to ride (I have 2 1100's as well) but on the B roads I tend to ride around Norfolk / Suffolk, it is a lot more fun and easier on my body. Not bad for touring on as well - took mine to EuroKat 8 in Denmark this year.

Rob

User avatar
Uncle Bob
Site Admin
Posts: 1667
Joined: Mon Nov 26, 2012 12:05 pm
Location: Norwich, Norfolk
Has thanked: 634 times
Been thanked: 228 times
Contact:

Re: New exhaust for 400 katana

Post by Uncle Bob » Fri Nov 16, 2018 10:20 am

I find using the model Codes can be the best option:

GSX400S Impulse - GK79A
GSX400SSN Katana - GK77A

Rob

User avatar
PaulD
Club Member
Posts: 1082
Joined: Mon Jan 01, 2018 5:48 pm
Location: Usually either the shed or bed
Has thanked: 513 times
Been thanked: 209 times

Re: New exhaust for 400 katana

Post by PaulD » Fri Nov 16, 2018 4:41 pm

Plus 1 on the carb “O” rings, I rebuilt the carbs on my 1100 and I also did the fuel tap at the same time. The carbs have performed perfectly since (unlike the rest of the bike :oops: )
There rubbish them Jap bikes lad they won't last five minutes! you want to get yourself a nice Royal Enfield!
A quote from my old dad 8-)

I started out with nothing and I’ve got most of it left!
KOC member 453

pookie
Posts: 477
Joined: Tue May 20, 2014 5:47 pm
Been thanked: 121 times

Re: New exhaust for 400 katana

Post by pookie » Fri Nov 16, 2018 8:01 pm

Plus 2 for the viton o ring kit, I got both kits but couldn't be bothered to mess about with the throttle screws either, use super unleaded fuel 'cos it helps the carbs (Esso supreme super unleaded contains no ethanol) fit a magnetised fuel filter, try two wheel spares on e-bay for parts, exhausts crop up on there now and again, as mentioned, ordering stuff direct from Japan can cost double the price of the part once the customs / shipping have been added, good luck with the search.

User avatar
fossie
Club Member
Posts: 4837
Joined: Sat Oct 23, 2010 9:16 pm
Has thanked: 133 times
Been thanked: 676 times

Re: New exhaust for 400 katana

Post by fossie » Mon Nov 19, 2018 9:44 pm

If you tap in Suzuki GSX 400 exhaust in to eBay , you will find 3 or 4 end cans , and 1 set of down pipes . The model impulse you need will listed by the years 90's not the 83 ish model.
CLUB Chairman


My Gallery

Post Reply