How to replace oil check valves?

[sportston]

Does anyone know how to change the common GT oil check valves safely please. Is there a link or video on this topic?

[Craig380]

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/" onclick="window.open(this.href);return false;

[joethebike]

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;" 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.

[old racer]

Just don't buy those check valves.

[joethebike]

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?

[tz375]

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.

[joethebike]

I see what you mean about the end cap, my old eyes thought it was all one piece.

[johnakay]

heard that Kawasaki triple check valve will fit and can still get them.

[sportston]

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.

[tricky1962]

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

[sportston]

I fitted the new Kawasaki ones. Hopefully they will be ok.