Things you don't know about your oil pump

Coyote · Post by **Coyote** » Tue May 12, 2015 10:01 am

I certainly didn't know this. I found this chart in my Suzuki printed manual.. This is telling me that once the pump arm reaches 14.3 degrees, the amount of oil going to the cranlshaft remains a constant. Anything past that does not increase the flow to the crank. It certainy does for the cylinders, but not the crank.
So from this I assume that holding the lever full open to expedite air bubble removal at start up is pretty much a waste of time as far as the lines feeding the crank. I had no idea that the flow to the crank was a constant. Did you?

GT750Battleship · Post by **GT750Battleship** » Tue May 12, 2015 5:16 pm

Hi,more reading...Google GT750 - Oil Pump Pink Possum
Cheers,
Roger

Coyote · Post by **Coyote** » Tue May 12, 2015 6:04 pm

I forgot this came from a 550 manual. Odd manual. Printed by Suzuki, it covers the GT550J only. I say that because it has all the info on the twin leading shoe front brake. Zero mention of a disk brake that we all know started with the K model in 73.

pearljam724 · Post by **pearljam724** » Tue May 12, 2015 9:24 pm

Nice to know. Did not know that. Here's another one. Did you know that the late model 550 and I'm assuming the 380 carbs have an adjustable governor on them ?

Coyote · Post by **Coyote** » Tue May 12, 2015 10:09 pm

A governor? Really? The last governor I saw was on a Briggs & Stratton. Do tell!

pearljam724 · Post by **pearljam724** » Tue May 12, 2015 10:58 pm

Look directly behind the cable pulley on the vertical wall. There's a phillip screw with a loaded spring roughly 20-30 mm long. The further you screw it out. The pulley is restricted from obtaining a full throttle. It's the only explanation I can see for that odd screw.

Craig380 · Post by **Craig380** » Wed May 13, 2015 12:57 am

Yes, that screw is the stop for the cam plate that the cables are mounted on. In theory you could adjust it to stop the slides raising fully ...

rngdng · Post by **rngdng** » Wed May 13, 2015 5:46 am

Coyote wrote:I forgot this came from a 550 manual. Odd manual. Printed by Suzuki, it covers the GT550J only. I say that because it has all the info on the twin leading shoe front brake. Zero mention of a disk brake that we all know started with the K model in 73.

The GT750 manual only covers the engine for the J/K. All other references are in service bulletins and addendums.

Lane

Coyote · Post by **Coyote** » Wed May 13, 2015 6:32 am

That screw is part of the setup and sync of the carbs.

Post by **Alan H** » Wed May 13, 2015 3:52 pm

Coyote wrote:I forgot this came from a 550 manual. Odd manual. Printed by Suzuki, it covers the GT550J only. I say that because it has all the info on the twin leading shoe front brake. Zero mention of a disk brake that we all know started with the K model in 73.

K model actually came out in 1972.
I have a GT550 K made in August '72 and sold in the US market with a US VIN plate.
Imported to UK in 2011 (and bought by me), on the road last year and running fine. Still not impressed with the disc brake though - the 4LS was much better.
Pity I can't find who had the bike originally, it would be nice to let them know how it was running.

Things you don't know about your oil pump

Things you don't know about your oil pump

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