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PostPosted: Mon Apr 21, 2014 1:34 pm 
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Moto GP
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Joined: Mon Dec 13, 2010 4:32 pm
Posts: 3146
Location: southwestern Pennsylvania
Country: USA
Bikes owned: 69 T350 thru 75 GT750
Have an early T350 with oil lines that have rebuildable check valves.
T305s & early T500s had the rebuildable check valves -- presumably my T350 has them because of the parts-bin manufacturing Suzuki did back then.

I need replacement springs & balls.
Seems that some PO rebuilt the lines & didn't include the springs & balls.

Any suggestions?

The rebuildable & non-rebuilable lines look like this:
Image

A few forum posts mention the Kawasaki rebuildable valves.
Does anyone know if the parts for those valves fit?
(I can't compare the old Suzuki parts to the new Kawasaki parts because the old Suzuki parts were missing.)

The eBay listing for the Kawasaki parts is here:
http://www.ebay.com/itm/Kawasaki-H1-H2-oil-line-check-valve-replacement-springs-and-stainless-balls-/201077268002

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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: Mon Apr 21, 2014 4:52 pm 
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Road race school

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Location: Sydney New South Wales
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Bikes owned: Suzuki GT750A 1976
:up: available new on Ebay UK, just enter Suzuki oil line check valves as a search, £44 pounds :)
Cheers,
Roger.

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PostPosted: Mon Apr 21, 2014 6:00 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
Already got those check valves from the UK. Those check valves are replacements for the non-rebuildable Suzuki check valves.

They don't work with oil lines designed for the rebuildable Suzuki check valves.
See:
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: Mon Apr 21, 2014 6:50 pm 
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Moto GP
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Joined: Fri Oct 24, 2008 5:55 pm
Posts: 3972
Location: Lancaster Pa.
Country: US
Bikes owned: GT750 x2 97 -1200 Bandit 86 GSXR1100
Hummmm , thats the first time i have seen anyone comment or have seen pictures of a model with rebuildable check valves :shock: i wonder if the guts out of a standard oil injection spider would fit in ?

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PostPosted: Mon Apr 21, 2014 9:40 pm 
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Moto GP
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Location: Mostly Barbados, sometimes Florida and western Canada
You are right, early T500s had the rebuildable check valves. If you can find some or one on Ebay it might pay to buy it and test it or disassemble it for the parts inside the valves.

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69 Suz U70
69 Suz T500
72 Suz GT750 cafe
74 Suz TS250
74 Suz GTXVR project
75 Suz RE5
75 Suz GT750
76 Suz TS400
76 Suz GT750
81 Suz GSX1100
86 Suz RG500x2
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PostPosted: Tue Apr 22, 2014 2:01 am 
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On the main road

Joined: Fri Nov 07, 2008 3:01 am
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Location: Tallinn, ESTONIA
Jabcb,
I should have both early T500 oil lines and H1 oil lines on the shelf but please allow me few days for further investigation.
Argo

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PostPosted: Wed Apr 23, 2014 5:52 am 
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Moto GP
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Joined: Mon Dec 13, 2010 4:32 pm
Posts: 3146
Location: southwestern Pennsylvania
Country: USA
Bikes owned: 69 T350 thru 75 GT750
argo1974 wrote:
Jabcb,
I should have both early T500 oil lines and H1 oil lines on the shelf but please allow me few days for further investigation.
Argo

Don't disassemble some good oil lines that are in your parts inventory. Keep them for your future use.

Am doing a complete rebuild (Bune crank rebuild & oversize pistons) so I'm going to have a lot into this motor.
No point in skimping on the oil lines especially since I can use NOS lines.

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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: Wed Apr 23, 2014 11:32 am 
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On the main road
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Joined: Wed Dec 30, 2009 9:35 am
Posts: 121
Location: Wakefield, United Kingdom
Country: UK
Bikes owned: GT380 & GSF650 Bandit
For anyone that needs them here's the instruction's for rebuilding the check valves.

http://www.1970sjapmotorbikeparts.co.uk ... ctions.pdf


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PostPosted: Wed Apr 23, 2014 4:33 pm 
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Moto GP
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Posts: 3181
Location: Ontario
Country: Canada
Bikes owned: GT750(Jx3,L,M,A,B),T500
Suzukidave wrote:
Hummmm , thats the first time i have seen anyone comment or have seen pictures of a model with rebuildable check valves :shock:

Hmmm indeed - I dimly recall mentioning it here :D viewtopic.php?f=8&t=7113&p=128385&hilit=rebuildable#p128385" onclick="window.open(this.href);return false; 8)

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If at first you don't succeed, just get a bigger hammer !


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PostPosted: Wed Apr 23, 2014 5:29 pm 
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Moto GP
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Joined: Fri Oct 24, 2008 5:55 pm
Posts: 3972
Location: Lancaster Pa.
Country: US
Bikes owned: GT750 x2 97 -1200 Bandit 86 GSXR1100
oldjapanesebikes wrote:
Suzukidave wrote:
Hummmm , thats the first time i have seen anyone comment or have seen pictures of a model with rebuildable check valves :shock:

Hmmm indeed - I dimly recall mentioning it here :D viewtopic.php?f=8&t=7113&p=128385&hilit=rebuildable#p128385" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false; 8)
Yep .. missed that one , i dont visit the restoration section very often .

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PostPosted: Tue Jun 12, 2018 2:30 pm 
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Around the block
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Joined: Mon Jun 12, 2017 12:01 pm
Posts: 67
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
Hello old thread

Found one of those pipes myself a couple of days ago when going through my oil pump parts stash box. I think it came with an oil pump that I bought off ebay many years ago. I didn't need it and actually, I think I just glanced at it....thought it was homemade and put it away. The left side line must have come with it but it must have been the 'non rebuild-able' kind.

I think I'll polish up the brass on this ugly #2 oil pipe and remove the black sealer and use something a little more neutral/ pleasing to the eye and look to buy it's #3 brother somewhere so I have a matched pair that I may very well need. I've had a true NOS later pair of lines in the original packaging for many years but I can't bring myself to use them. :wink: :oops:

I could not find a part number in an old parts book pdf for these lines but according to some of Ian's research, the earliest parts numbers for the #2 and #3 oil pipes were 16820-15030 and 16840-15030.....https://www.oldjapanesebikes.com/mraxl_ ... s/page-A57" onclick="window.open(this.href);return false;"

A little more reference to check valves here (scroll down).... viewtopic.php?f=23&t=9437" onclick="window.open(this.href);return false;

Here's the rightside (#2) from my spare parts stash. I hung it and some other ones (later version)up overnight and with no leaks from the check valves on this one.

.....but had flushed out a little blockage from the engine side of the of the ball,in the banjo itself.....










:shock: beetlejuice...beetlejuice
Image

Image

Image

Image
Note the spring taper for the ball
Image

Image

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