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 Post subject: Oil Pump Over haul
PostPosted: Tue Oct 31, 2017 9:04 am 
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Still in the Driveway

Joined: Sat Oct 28, 2017 1:09 pm
Posts: 3
Country: Canada
Bikes owned: GT380
Hi Guys, new to the forum and would ask for help with my 1972 GT380 which is leaking 2 stroke oil, can someone point me in the direction in the forum that may show how to do the job and where I might get the gaskets etc.


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 Post subject: Re: Oil Pump Over haul
PostPosted: Tue Oct 31, 2017 10:28 am 
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Moto GP
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Joined: Mon Dec 13, 2010 4:32 pm
Posts: 3243
Location: southwestern Pennsylvania
Country: USA
Bikes owned: 69 T350 thru 75 GT750
Where is it leaking?

_________________
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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 Post subject: Re: Oil Pump Over haul
PostPosted: Tue Oct 31, 2017 10:37 am 
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To the on ramp

Joined: Tue Mar 10, 2015 12:35 pm
Posts: 427
Location: Wales
Country: WALES
Bikes owned: suzuki gt 550j
Welcome to the forum lots of good help on here
http://www.pinkpossum.com/GT750/Oilpump.htm" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;
This will help you understand the pump although its about the 750 the basics are the same.
These pumps are very reliable and dont often go wrong but as Jabcb says we need to know where it leaks?

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98 carb Blackbird and GT550j


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 Post subject: Re: Oil Pump Over haul
PostPosted: Tue Oct 31, 2017 12:29 pm 
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Road race school

Joined: Wed Jul 10, 2013 12:04 pm
Posts: 814
Country: England, UK
Bikes owned: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S
That's a great link, but where can you get replacement oil seals for these things? I would like to do a strip and rebuild of my own gt380 pump too, just to be thorough. So I will be watching this post with interest.


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 Post subject: Re: Oil Pump Over haul
PostPosted: Tue Oct 31, 2017 12:51 pm 
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Still in the Driveway

Joined: Sat Oct 28, 2017 1:09 pm
Posts: 3
Country: Canada
Bikes owned: GT380
I am having trouble pin pointing it but it is dripping down near the center stand, I have only just got the bike and the previous owner most definitely over filled the transmission which I have since drained.


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 Post subject: Re: Oil Pump Over haul
PostPosted: Tue Oct 31, 2017 2:09 pm 
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To the on ramp

Joined: Tue Mar 10, 2015 12:35 pm
Posts: 427
Location: Wales
Country: WALES
Bikes owned: suzuki gt 550j
https://www.discountbikespares.co.uk/ou ... GT125.html" onclick="window.open(this.href);return false;
Or
https://www.ebay.co.uk/itm/Genuine-Suzu ... Sw9GhYmaSM" onclick="window.open(this.href);return false;

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98 carb Blackbird and GT550j


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 Post subject: Re: Oil Pump Over haul
PostPosted: Tue Oct 31, 2017 2:19 pm 
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Moto GP
User avatar

Joined: Mon Dec 13, 2010 4:32 pm
Posts: 3243
Location: southwestern Pennsylvania
Country: USA
Bikes owned: 69 T350 thru 75 GT750
It may actually be leaking from the connection between the oil tank & hose. The oil then runs down the hose & makes a mess of everything.

_________________
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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 Post subject: Re: Oil Pump Over haul
PostPosted: Tue Oct 31, 2017 2:31 pm 
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To the on ramp

Joined: Tue Mar 10, 2015 12:35 pm
Posts: 427
Location: Wales
Country: WALES
Bikes owned: suzuki gt 550j
abs268 wrote:
I am having trouble pin pointing it but it is dripping down near the center stand, I have only just got the bike and the previous owner most definitely over filled the transmission which I have since drained.

So we are sure its 2T engine oil and not 20\50 transmission oil?
If it is 2T there are several places it could leak. First place to Check is the oil sight window in the oil tank. They can sometimes weep from there. Then check the integrity of the connection of the tank to pump hose are the clamps good and tight? Then where the feed pipe banjo is bolted to the pump ensure there is a good gasket washer either side and the bolt is tight(be careful too tight and it will strip the thread) then ensure the pump is tight down on the oil feed pipe spider there are 3 phillips head bolts. The problem with oil leaks is its difficult to trace the source as the oil will run down and drip away from the leak.
Have a look here it may help
https://youtu.be/necW4LnXBHM

_________________
98 carb Blackbird and GT550j


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 Post subject: Re: Oil Pump Over haul
PostPosted: Tue Oct 31, 2017 4:15 pm 
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Still in the Driveway

Joined: Sat Oct 28, 2017 1:09 pm
Posts: 3
Country: Canada
Bikes owned: GT380
Thanks Guys, I will start as suggested.


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 Post subject: Re: Oil Pump Over haul
PostPosted: Tue Oct 31, 2017 6:21 pm 
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On the street

Joined: Tue Aug 22, 2017 5:29 pm
Posts: 14
Country: Canada
Bikes owned: Original owner GT550L
With the engine cold, spray it down with brake cleaner. Let it dry and dust it with baby powder. Let it sit overnight and check for leaks tomorrow. Oil leaks will show up in the baby powder as dark spots! Do the bottom of the oil tank, the hose down to the pump and the pump too.
If nothing shows up overnight cold, run the bike until it's warm/hot on the cener stand and have a look for leaks.
Cliff.


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 Post subject: Re: Oil Pump Over haul
PostPosted: Wed Nov 01, 2017 8:46 am 
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Road race school

Joined: Wed Jul 10, 2013 12:04 pm
Posts: 814
Country: England, UK
Bikes owned: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S
Cliff56 wrote:
With the engine cold, spray it down with brake cleaner. Let it dry and dust it with baby powder. Let it sit overnight and check for leaks tomorrow. Oil leaks will show up in the baby powder as dark spots! Do the bottom of the oil tank, the hose down to the pump and the pump too.
If nothing shows up overnight cold, run the bike until it's warm/hot on the cener stand and have a look for leaks.
Cliff.

Thats excellent. I like the baby powder trick! Not heard of that before.


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 Post subject: Re: Oil Pump Over haul
PostPosted: Wed Nov 01, 2017 7:54 pm 
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On the street

Joined: Tue Aug 22, 2017 5:29 pm
Posts: 14
Country: Canada
Bikes owned: Original owner GT550L
Helps prevent monkey butt too!!


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 Post subject: Re: Oil Pump Over haul
PostPosted: Thu Nov 02, 2017 1:20 pm 
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Road race school

Joined: Wed Jul 10, 2013 12:04 pm
Posts: 814
Country: England, UK
Bikes owned: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S
Cliff56 wrote:
Helps prevent monkey butt too!!

Spray brake cleaner on your butt first?


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