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PostPosted: Wed Dec 06, 2017 4:42 pm 
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Joined: Sun Jul 13, 2014 7:55 pm
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Location: Greendale Vic, Australia
Country: Australia
Bikes owned: AS50, GS500, GT500, ex GSXR750 slabbie
My AS50 oil pump needs a seal kit, -leaking oil down into the sump by the looks of it.
I got a seal kit, but some of the seals / o-rings are incorrect size.
So I'm thinking of just blanking off the oil pump delivery and running premix.
Anyone done this on the A50 or AS50 ?
I'm pretty sure it'll be okay, but just want to make sure that the oil doesn't need pumping to the mainbearing area as well (like the GT500 for example).


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PostPosted: Wed Dec 06, 2017 5:17 pm 
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Joined: Mon Dec 13, 2010 4:32 pm
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Location: southwestern Pennsylvania
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Bikes owned: 69 T350 thru 75 GT750
Per the brochure on SuzukiCycles.org, oil is directly pumped to the crank bearings.
Image

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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
Yamaha 75 XS650
09 Triumph Bonneville SE


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PostPosted: Thu Dec 07, 2017 5:28 am 
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Joined: Sun Jul 13, 2014 7:55 pm
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Location: Greendale Vic, Australia
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Bikes owned: AS50, GS500, GT500, ex GSXR750 slabbie
hmmm... I wonder if 68 and 70 oil pumps are different. My pump is a Mikuni 1M-4. Bike is 68.
I can't find any seals kit apart from the kit I already bought which has different orings and seals.
Looks like theres a direct oil feed to the big end and mains so premix might be a bit risky.


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PostPosted: Thu Dec 07, 2017 9:03 am 
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Moto GP
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Location: southwestern Pennsylvania
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Bikes owned: 69 T350 thru 75 GT750
The T250/T350/T500/GT250/GT500 oil pump uses standard o-rings & oil seals. All of them are still available.
Your pump probably also uses standard o-rings & oil seals.
They can be a PITA to find but it should be doable.

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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
Yamaha 75 XS650
09 Triumph Bonneville SE


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PostPosted: Thu Dec 07, 2017 11:36 am 
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Location: Wales
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Bikes owned: suzuki gt 550j
It may be worth contacting a company that sells o rings and give them the specifications. Just make sure they are 'Viton' that will ensure they resist oil/petrol. How about these http://www.sealingaustralia.com.au/orings/

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PostPosted: Thu Dec 07, 2017 4:02 pm 
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Joined: Sun Jul 13, 2014 7:55 pm
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Location: Greendale Vic, Australia
Country: Australia
Bikes owned: AS50, GS500, GT500, ex GSXR750 slabbie
Yes the o-rings should be 'gettable', but there are a couple of double-lipped seals on the central part (piston?) that look to be very specific, and important seals. They're about 10mm OD and with the seal 'lips' on the OUTSIDE. I can try an O-ring in one of these positions because it sits in a groove, but on the other position an o-ring wouldn't work because there's nothing to contain it in position. I might take a pic to clarify.
(That Sealings Australia site looks useful).


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PostPosted: Tue Dec 12, 2017 5:48 pm 
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Location: Greendale Vic, Australia
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Bikes owned: AS50, GS500, GT500, ex GSXR750 slabbie
Suzuki AS50 or A50 - Anyone got a parts list for 1968 model?
I need the part number for the OIL PUMP ASSEMBLY. And/or if it's possible, a copy of the parts listing which shows the seals and their sizes.

Note that I can find the 1971 parts list online, but I think that the '68 oil pump MAY be different.
I want to clear this up because the feller who sold me the incorrect seals kit advertises it as correct for AS50 but the pack says only 'A100 FR80 RC100'. His Suzuki Part number is 16001-05826, but I am expecting the '68 part number will be different.


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PostPosted: Tue Dec 12, 2017 8:13 pm 
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Moto GP
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Joined: Mon Dec 13, 2010 4:32 pm
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Location: southwestern Pennsylvania
Country: USA
Bikes owned: 69 T350 thru 75 GT750
Look closely at the seals to see if there are any numbers. (You might have to remove the seal to see them.)


Your best bet is to buy a printed parts manual.

Paul Miller has a 1986-1971 parts & service manual listed on eBay:
https://www.ebay.com/itm/Suzuki-AS50-AC50-parts-service-combo-manual-1968-1971/172704383773
The New Zealand eBay seller that sells manual might also have something.

_________________
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
Yamaha 75 XS650
09 Triumph Bonneville SE


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PostPosted: Tue Dec 12, 2017 8:32 pm 
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Joined: Sun Jul 13, 2014 7:55 pm
Posts: 225
Location: Greendale Vic, Australia
Country: Australia
Bikes owned: AS50, GS500, GT500, ex GSXR750 slabbie
Well, thanks mate, but that'd cost me close to A$100 just to get that simple info.
Hopefully someone is out there who would share.

Regarding the seals markings, I don't know if you've ever seen the size of them, but a couple of the seals are TINY, (the ones on the 'metering rod') -if they actually could even mould in a number you'd need an electron microscope to read it!


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