8 valve Oil gallery question (Photo included)

[ashdricky]

Thank you all for the information, especially the schematics, I have already built adapter plates using the traditional design. (below is a photo of my 2nd gen kit installed)


I am looking into designing something new that is easier for me to machine. here is what I believe the new oil flow path would be if I deposit the cooled oil into the main AKA "transverse gallery"


ultimately what is the verdict? Will it starve any area of oil if all of the pressure comes from the transverse gallery rather than the pressure sensor gallery?

[Nessism]

As mentioned already, I suspect it would be fine to dump the return oil into the transverse galley but some R&D testing is recommended. You could make another adapter, or use a T fitting, and add a pressure gauge into the system to measure oil pressure in the distribution cavity. It would be interesting to see what happens to the pressure with the various configurations of the system: with no cooler, with cooler and return flow back to cavity, with cooler and return flow to transverse galley. If you return to the transverse galley the main thing is to make sure the distribution cavity is getting some flow and thus, the transmission gets enough oil.

When installing an oil cooler you may want to also install the GS750 oil pump gears since they spin the pump faster than the stock gears. I know this works for the bigger GS bikes, but not positive the gears fit the smaller engines.

[ashdricky]

When installing an oil cooler you may want to also install the GS750 oil pump gears since they spin the pump faster than the stock gears. I know this works for the bigger GS bikes, but not positive the gears fit the smaller engines.

dose installing 750 gears require me to split the case?........again.

[Agemax]

dose installing 750 gears require me to split the case?........again.

no, just the clutch cover and the clutch.
just a thought......with that oil schematic you posted above, would it not take a long time for the oil to reach the head on cold start ups?

[Steve]

... with that oil schematic you posted above, would it not take a long time for the oil to reach the head on cold start ups?

That would depend on how much oil fell out of the pump and other passages while the engine was not running. I have never checked for that possibility, but I would imagine that some oil remains in the passages, just waiting to be pushed along when the pump starts up again.

On the other hand, that is one reason that I cringe when I hear a cold engine start up on "choke" and race to 4,000 RPM.
I try to find the "sweet spot" on the "choke" that allows easy starting with minimal application, meaning 'minimal speed'.
I usually keep starting revs down between 2,000 and 2,500 RPM whenever possible.

.

[TeamDar]

dose installing 750 gears require me to split the case?........again.

I am assuming that you are talking about a GS550 engine?
The only engines that benefit from switching to GS750 oil pump gears are the GS 850/1000/1100/1150. The GS550 already has the 750 gear on the clutch and a large gear on the pump.

[ashdricky]

I am assuming that you are talking about a GS550 engine?
The only engines that benefit from switching to GS750 oil pump gears are the GS 850/1000/1100/1150. The GS550 already has the 750 gear on the clutch and a large gear on the pump.

yes this is a 550 motor we're talking about. so they smaller bikes have higher oil flow rates? do you know why this is?

[TeamDar]

Different primary gear ratios.

[ashdricky]

Different primary gear ratios.

got it. do smaller engines need more oil for some reason?

[1980GS1000E]

got it. do smaller engines need more oil for some reason?

The smaller engines use plain bearings which need the higher oil pressure.

[Nessism]

The smaller engines use plain bearings which need the higher oil pressure.

First generation 550 uses a roller crank. 650E does too.

[ashdricky]

really weird ? here, would it be possible to set up a pseudo-drysump system? with a medium sized reservoir for the oil placed where the air box would regularly go? or is that just youthful foolishness?

[Agemax]

really weird ? here, would it be possible to set up a pseudo-drysump system? with a medium sized reservoir for the oil placed where the air box would regularly go? or is that just youthful foolishness?

i guess so but you would need an external oil pump, probably electric would be easiest, then work out where you would plumb it in. you would also need a return feed to the tank as well which could prove the tricky part

[ashdricky]

assuming that I did build a system that would pump oil from the reservoir, I would send the oil from the tank to the distribution gallery behind the jugs under the carbs? essentially relocationg the oil storage from the oil pan to the tank? Isn't there a heatsink of some kind which is related to the charging system that is submerged in the oil pan? how would this affect the operation of my motor as this is obviously going out of the scope of intended operation?

[ashdricky]

where dose the clutch hub get its oil from? It seems that there is an oil orifice on the shaft that the clutch mounts to,(what is the correct name?) but I cannot figure out where this orifice is fed from, it seems to be the inside of the shaft, where the push rod for the clutch is. I have a spare gearset which was removed from an identical bike which I am using for my R&D.