oil pump on gt380...and other migraines

Everything you want to know about oil but were "afraid to ask"!

Moderators: oldjapanesebikes, H2RICK, diamondj, Suzsmokeyallan

Post Reply
User avatar
Suzukidave
Moto GP
Posts: 3980
Joined: Fri Oct 24, 2008 5:55 pm
Country: US
Suzuki 2-Strokes: GT750 x2 97 -1200 Bandit 86 GSXR1100
Location: Lancaster Pa.

Re: oil pump on gt380...and other migraines

Post by Suzukidave »

Hi Martin , here is a board members site with lots of the info you will need for your restoration http://www.oldjapanesebikes.com/mraxl_G ... index.html" onclick="window.open(this.href);return false; and yeah there are ways to check the oiling system and while you have it apart might as well clean out and check the one way inline valves in the injector lines also described on the site :up: .
the older i get the faster i was
User avatar
tz375
Moto GP
Posts: 6204
Joined: Mon Nov 03, 2008 10:47 am
Location: Illinois

Re: oil pump on gt380...and other migraines

Post by tz375 »

It takes forever kicking it over. Here's a simple approach.

1 pinch off oil feed line
2 Remove oil pump
3 Fill oil lines with a simple hand held oil can or syringe - use oil that's a different color to what's in the tank
4 replace pump
5 un-pinch oil line
6 bleed oil pump (there's a screw at the top, loosen it until oil seeps out and replace it)
7 run bike around the block and see if oil from the tank has replaced the oil in the lines (remember the tip about different colors? That's why).

If that doesn't work, or only some of the lines changed color, you will have to remove the plastic feed manifold aka Octopus and clean it out with alcohol. Do not use high air pressure from a compressor - that will destroy the check valves.

Clean out the banjo bolts and force feed oil through the drillings in the crankcase with your oilcan or syringe to be 100% sure that nothing is blocked. Then repeat the trick to change oil color by riding around. It's magic when it works.
Post Reply