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PostPosted: Fri Feb 16, 2018 4:21 am 
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Yeah Man, the Interstate

Joined: Wed Jul 10, 2013 12:04 pm
Posts: 668
Country: England, UK
Bikes owned: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S
Does anyone know how to change the common GT oil check valves safely please. Is there a link or video on this topic?


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PostPosted: Fri Feb 16, 2018 6:42 am 
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Expert racer

Joined: Mon Dec 01, 2008 2:52 am
Posts: 1109
Location: Manchester, UK
There was an article in Classic Mechanics about doing this, the problem is glueing the oil lines, a special adhesive is needed because of the oil line material.

Have a look here: https://www.oldjapanesebikes.com/blog/2 ... ion-lines/

_________________
1976 GT380 - wounded by me, and sold on
2006 SV650S. It's got cams, and valves, and stuff


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PostPosted: Fri Feb 16, 2018 5:51 pm 
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On the street
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Joined: Mon May 23, 2011 4:23 am
Posts: 49
Location: Maleny, Queensland, Australia
Country: Australia
Bikes owned: Suzuki T20-250-350-500, DL650
If you look at this eBay seller of new check valves he details a removal/refit process: https://www.ebay.com.au/itm/Suzuki-GT75 ... xy63FSnMu9" onclick="window.open(this.href);return false;

Been having some troubles with air in my right T350 oil lines and my third and last right oil line spare seems to be working OK however, refitting new check valves into the old oil lines looks a bit intimidating.


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PostPosted: Fri Feb 16, 2018 5:57 pm 
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To the on ramp

Joined: Mon Mar 05, 2012 1:22 pm
Posts: 230
Location: Wales UK
Country: Wales
Bikes owned: RG250 GT750L GT750 DRAG seelyt500 tr500MK3
Just don't buy those check valves.


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PostPosted: Sat Feb 17, 2018 5:42 am 
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On the street
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Joined: Mon May 23, 2011 4:23 am
Posts: 49
Location: Maleny, Queensland, Australia
Country: Australia
Bikes owned: Suzuki T20-250-350-500, DL650
I pulled out one of the T350 check valves today and noted they are different to the GT750 valves pictured in old posts on the subject. The GT750 valves have the spring and ball inserted into the oil line end of the brass body while the T350 valve's brass body only has a 2mm hole in the oil line end and the spring and ball are somehow enclosed within the body of the brass valve.
How do they get the spring and ball into what seems like a formed in one piece brass body?


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PostPosted: Sat Feb 17, 2018 9:51 am 
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Moto GP
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Joined: Mon Nov 03, 2008 10:47 am
Posts: 5941
Location: Illinois
Joe, I think that GT750s are the same. There is an end cap that holds the spring and ball in place but it's hard to spot. The end that the nylon feed line fits over can be removed with a pair of pliers. Twist it and it should come loose.


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PostPosted: Sat Feb 17, 2018 3:28 pm 
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On the street
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Joined: Mon May 23, 2011 4:23 am
Posts: 49
Location: Maleny, Queensland, Australia
Country: Australia
Bikes owned: Suzuki T20-250-350-500, DL650
I see what you mean about the end cap, my old eyes thought it was all one piece.


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PostPosted: Sun Feb 18, 2018 10:16 am 
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I likes them jubblies
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Joined: Wed Oct 15, 2008 11:19 am
Posts: 2222
Location: OL BLIGHTY uk
Country: uk
Bikes owned: tracer 700
heard that Kawasaki triple check valve will fit and can still get them.

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If I wanted to make a life-long career out of
working with the mentally retarded I would
have opened a Harley Davidson Dealership


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PostPosted: Sun Feb 18, 2018 11:06 am 
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Yeah Man, the Interstate

Joined: Wed Jul 10, 2013 12:04 pm
Posts: 668
Country: England, UK
Bikes owned: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S
Thank you. It didn't have the info I was looking for. I wanted to know how to remove and replace the banjos without damaging the pipes. I worked it out in the end, but not before damaging two pipes which I have now repaired.
The technique that worked is to heat the ends up with a hair drier and wiggle the plastic ends off using a pair of pliers and a sideways wiggling movement. Just pulling them straight back will almost certainly end up with the pliers slipping off and snapping the pipe.


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PostPosted: Mon Feb 19, 2018 4:58 pm 
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To the on ramp

Joined: Wed Jul 18, 2012 10:46 am
Posts: 229
Location: Eastbourne
Country: United Kingdom
Bikes owned: T500J
old racer wrote:
Just don't buy those check valves.


I bought those check valves before 2015 (that's as far as my ebay history goes so can't be more definitive)

I do about 4000 miles a year so we are looking at 12000 mile+ on those valves.

I have had no problems

I have no connection with that company/dealer

I dislike slagging off someone without backing up the slagging with facts, some come on, what's your experience with their product?

Another forum I frequent has a no name no shame policy, maybe this one should too


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PostPosted: Wed Feb 21, 2018 3:03 pm 
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Yeah Man, the Interstate

Joined: Wed Jul 10, 2013 12:04 pm
Posts: 668
Country: England, UK
Bikes owned: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S
I fitted the new Kawasaki ones. Hopefully they will be ok.


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