Canada restrictive exhaust.

[petrolhead]

Hello fellow GS?s,
I have found a ?new? GS 1000 E but it lacks power.
It is imorted from Bitish Colombia ad has the VM26SS carbs.
Looking into the exhaust it seems unlike my previous GS 1000 E muffler; wich was also a 1978 model.
It is the original exhaust system so i?m a bit ?baffled?
Has anyone had eperience with downtuned Canada models due to environment rules ?

 

[petrolhead]

Seems like the end is closed...

 

[Gorminrider]

Has anyone had eperience with downtuned Canada models due to environment rules ?

Not really to notice- we generally get "California" models. But for Europe, there are drastic reductions in HP, usually on bikes around 250-400cc that new restricted riders are able to licence.

 

[petrolhead]

I have read somewhere online that Canadian bikes were restricted in the seventies to meet tighter emission regulations.
This could be ?squezing? the exhaust gasses flow by rings or other means and/or changing the carburation; different needle/needle jet etc.
So I would like to hear from anyone who has had the same experience.
My bike definatly lacks power while it?s completely stock and in good working order (except from the restrictions...)

 

[petrolhead]

I made a mistake it is not completely stock; it has a electronic ignition...

 

[trevor]

It was always well known that Canadian motorcycle models in the late 70s and early 80s were less restricted than American models mostly because to sell their bikes in the USA they had to meet stricter California emissions. Hence, for example why the USA never got bikes like the Suzuki RG 500 (Gamma)

 

[rphillips]

I always thought the U.S. bikes had "more" restrictions. Hence the non adjustable needles in the U.S. carbs & the "adjustable needles" in the Canadian carbs. I never did it but always heard we could order needles for a Canadian model carb & it would have slots to raise or lower the needle, we had to buy & stack up tiny washers to raise or lower ours. Also never heard of de-tuning by restricting the exhaust on any bike.

 

[Big T]

I have read somewhere online that Canadian bikes were restricted in the seventies to meet tighter emission regulations.
This could be ?squezing? the exhaust gasses flow by rings or other means and/or changing the carburation; different needle/needle jet etc.
So I would like to hear from anyone who has had the same experience.
My bike definatly lacks power while it?s completely stock and in good working order (except from the restrictions...)

Well, since whatever you read on restrictions is false, you need to check on that "good running order" situation

 

[petrolhead]

Okay, thanks for the input; i am going to check the bike ones more.
So the picture of the exhaust muffler is also normal with one end of the muffler closed ?

 

[petrolhead]

Could someone with a Gs 1000 E (1978-1979) please take a look at the muffler inside the exhaust and check if
the muffler is closed at the end as in the picture ?

 

[petrolhead]

@Big T,
I have read it on suzukicycles.org and on motorcycle specs.
Anything is possible with a 40 year old bike.
Maybe it went from USA to Canada before it came to England and then to Holland.
So it might be that it has California regulation restrictions.
It is imposible for me to find out.

 

[Big T]

There wasn't a California spec GS 1000, it is a 50 state spec bike. It will say so on the exhaust muffler.

No restrictions here, mine pumped out 84.3 RWHP on the dyno, it's stock.

 

[DaveR]

Hope this doesn't confuse things. Here's a pic of what is almost surely an original muffler from a sold in Canada 1979 GS1000N, the version with wire spokes and a single front disc. It doesn't have the same flat end as your muffler, but the hole size appears the same. Maybe the E and N models had different mufflers? Someone with more knowledge of the details might have an explanation.
Sorry

 

[rphillips]

Hey Dave, can you get a picture way down in there? Look at Petrol's first picture, it shows the tube is capped on the lower end, appx. 12" down in there. The exhaust gasses come thru the small holes in the wall of the tube. I'm betting yours is the same way. I think all the non "L" GS1000 chain drive (standard, "E", & "S") exhaust were the same till the 1980 "S" model, it was different, shorter & flat on the rear end, like the "L" models.

 

[petrolhead]

Hello Dave,
Thanks for watching; that?s exactly the bike i have !

 

[DaveR]

Hey Dave, can you get a picture way down in there? Look at Petrol's first picture, it shows the tube is capped on the lower end, appx. 12" down in there. The exhaust gasses come thru the small holes in the wall of the tube. I'm betting yours is the same way. I think all the non "L" GS1000 chain drive (standard, "E", & "S") exhaust were the same till the 1980 "S" model, it was different, shorter & flat on the rear end, like the "L" models.

Can't get a good pic but what I see looking with a flashlight is in both mufflers the tube is separated, one 4'' down the other 8''. The edges of the separation look sharp not corroded which suggests they were punched out and not rotted. The separated pieces are rattling around inside the muffler.

 

[petrolhead]

i will try to get the mufflers out and grind the ?endcap? off
Hopefully they are only welded at the end of the exhaust otherwise it might be difficult.

 

[steve murdoch]

In North America at least the stock exhaust systems for the GS1000 are extremely difficult to find and very pricey when you do find one.
Before you start dissecting yours i would consider looking into an aftermarket system.

 

[petrolhead]

It?s the same here, petrol tanks and exhaust systems...
But i want the original 4 in 2 exhaust and it should not block the gasses.
I?ll try to respect the system and force the mufflers out without damaging the exhaust.

 

[rphillips]

I really think your stock exhaust is exactly like it came from the factory. No way anyone could have got down in there & capped the end of the tube. That & there would be no reason for doing it. Don't know what you are comparing your low on power to, but I'd bet the exhaust has nothing to do with it. It's yours, but modifying a stock set of GS1000 exhaust may not be the best idea. Also after you open up the orig. exhaust it will never "sound orig." again. On my first GS1100E the orig. owner had drilled out the 6 little blocked off detents in the back of the exhaust, it sounded like crap. I'd think this over real good before doing anything drastic. Hard to believe nobody can shine a light down it theirs & make a picture to show what theirs look like. Good luck, we're on your side.