GT750 Crankcase Bypass and Oil Pump O Rings Q

General discussion about Street two-stroke Suzuki motorcycles.

Moderators: oldjapanesebikes, H2RICK, diamondj, Suzsmokeyallan

Post Reply
Drewski
On the main road
Posts: 113
Joined: Sun Aug 16, 2015 8:18 am
Country: UK
Suzuki 2-Strokes: GT750M TS125 TS100 GT750B
Location: East Angular, UK

GT750 Crankcase Bypass and Oil Pump O Rings Q

Post by Drewski »

Anyone have the dimensions of the O ring that fits between the crankcases at the water bypass please? Pretty sure there's not one in the gasket kit I have.

Also.....did I read somewhere that small pattern O rings for the oil pump are sometimes a fail and it's best to stick with Suzy ones?

Thanks, Drew.
User avatar
Suzsmokeyallan
Moto GP
Posts: 4326
Joined: Fri Oct 24, 2008 9:11 am
Location: Mostly Barbados, sometimes Florida and western Canada
Contact:

Re: GT750 Crankcase Bypass and Oil Pump O Rings Q

Post by Suzsmokeyallan »

09280-12002 is the bypass O ring you need to buy, I buy all oem orings since its easier to simply go to the dealer. Unless its one thats NLA.
Two strokes, its just that simple.

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
88 Hon CR500
93 Hon CBR900RR
98 Suz GSF1200x3
15 Kaw Ninja H2
User avatar
tz375
Moto GP
Posts: 6212
Joined: Mon Nov 03, 2008 10:47 am
Location: Illinois

Re: GT750 Crankcase Bypass and Oil Pump O Rings Q

Post by tz375 »

See if you can order OEM oil pump rings as well. I used pattern parts on a recent rebuild and the pump leaked. Turned out that the o rings were too large and one squeezed slightly out of place and was pinched between the pump and spider allowing oil to seep out slowly. Very annoying but easy to fix - and avoidable.
Drewski
On the main road
Posts: 113
Joined: Sun Aug 16, 2015 8:18 am
Country: UK
Suzuki 2-Strokes: GT750M TS125 TS100 GT750B
Location: East Angular, UK

Re: GT750 Crankcase Bypass and Oil Pump O Rings Q

Post by Drewski »

Muchos gracias senores :up:
Post Reply