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PostPosted: Thu Apr 19, 2018 2:56 pm 
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Moto GP
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Joined: Mon Dec 13, 2010 4:32 pm
Posts: 3195
Location: southwestern Pennsylvania
Country: USA
Bikes owned: 69 T350 thru 75 GT750
Questions are for the 1972 GT550 cafe build.

The crankcase has the early-style press fit SRIS fittings. Any tip on how to install them?

A pic of how Suzuki originally routed the SRIS lines on the underside of the crankcase would be useful.

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BAS (Bike Acquisition Syndrome) - too many bikes but have room for more

Suzuki:
GT750 2x75
GT550 72 project & 75
GT380 72
T500 73 project
T350 69, 71 & 72 project
T250 72
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE


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PostPosted: Fri Apr 20, 2018 8:21 am 
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Still in the Driveway
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Joined: Thu Jan 18, 2018 1:21 pm
Posts: 2
Country: United States
Bikes owned: '74 GT380, '01 GSF1200S
Here's a pic from my '74 GT380. Not sure if the GT550 is the same or not.

Mitch


https://goo.gl/photos/YnVDs1cjtuAbvtJ86" onclick="window.open(this.href);return false;


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PostPosted: Sat Apr 21, 2018 1:36 am 
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Moto GP
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Joined: Mon Dec 13, 2010 4:32 pm
Posts: 3195
Location: southwestern Pennsylvania
Country: USA
Bikes owned: 69 T350 thru 75 GT750
Thanks. I think the GT550 routing will be a bit different because of the starter motor.

_________________
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more

Suzuki:
GT750 2x75
GT550 72 project & 75
GT380 72
T500 73 project
T350 69, 71 & 72 project
T250 72
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE


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 Profile  
 
PostPosted: Sat Apr 21, 2018 8:43 am 
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Moto GP
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Joined: Mon Dec 13, 2010 4:32 pm
Posts: 3195
Location: southwestern Pennsylvania
Country: USA
Bikes owned: 69 T350 thru 75 GT750
Found a GT550 build topic with a useful pic. http://www.suzuki2strokes.com/forum/viewtopic.php?t=5351&start=15
Image

Any tips on how to install the early-style press fit SRIS fittings?

_________________
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more

Suzuki:
GT750 2x75
GT550 72 project & 75
GT380 72
T500 73 project
T350 69, 71 & 72 project
T250 72
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE


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 Profile  
 
PostPosted: Sat Apr 21, 2018 1:21 pm 
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To the on ramp

Joined: Tue Mar 10, 2015 12:35 pm
Posts: 369
Location: Wales
Country: WALES
Bikes owned: suzuki gt 550j
Hi
I have a 550 J but it has the screw in SRIS valves and i have no experience of the push fit ones.
However there is a Suzuki bulletin GT18 which has some info and diagrams that may help.

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98 carb Blackbird and GT550j


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PostPosted: Wed Apr 25, 2018 4:33 am 
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AMA Superbike
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Joined: Tue Oct 14, 2008 6:47 pm
Posts: 1722
Location: Blythewood, SC, USA
SRIS was an unnecessary experiment which really didn't do very much. I take them out.

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If you stroke it more than twice; you're playing with it.

Too many bikes, too much time, ENOUGH SPACE, FINALLY! Never enough money.........


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PostPosted: Wed Apr 25, 2018 7:05 am 
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Moto GP
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Joined: Mon Dec 13, 2010 4:32 pm
Posts: 3195
Location: southwestern Pennsylvania
Country: USA
Bikes owned: 69 T350 thru 75 GT750
Later GT380s didn’t have SRIS. Suzuki used bolts + washers to replace the crankcase SRIS fittings. So I got rid of the SRIS on the GT380 cafe build.

But my early GT550 has press-fit SRIS fittings so I can’t use the bolts. So I’m going to keep SRIS.

Perhaps a plus for SRIS might be that if the oiling is a little uneven with a cylinder not getting as much as the other, the SRIS might act to even it out a bit.

My current thought is that I should put the SRIS fittings in the freeze for a while.
Might also be advisable to put them in first in case I break one & have to replace it.

_________________
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more

Suzuki:
GT750 2x75
GT550 72 project & 75
GT380 72
T500 73 project
T350 69, 71 & 72 project
T250 72
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE


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 Profile  
 
PostPosted: Wed Apr 25, 2018 8:32 am 
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Moto GP
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Joined: Mon Nov 03, 2008 10:47 am
Posts: 5962
Location: Illinois
I seem to recall that they are a taper fit, so it should be possible to clean teh hole, smear on a little loctite and ring them in - or give them a light tap.

On the only 72 GT550 I have worked on, we drilled and tapped the holes and plugged them - the same way we plug GT750 SRIS holes. If you go that way, don't forget to plug the barrels too..


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PostPosted: Fri Apr 27, 2018 4:08 am 
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AMA Superbike
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Joined: Tue Oct 14, 2008 6:47 pm
Posts: 1722
Location: Blythewood, SC, USA
The ones on my cylinders were press-fit. A tap and set screw with lock-tite fixed that.....

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If you stroke it more than twice; you're playing with it.

Too many bikes, too much time, ENOUGH SPACE, FINALLY! Never enough money.........


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