GS1000 external Top End oil feed

[Agemax]

What size hose is recommended for an external feed to the cams? I am thinking AN-3 would be ok, possibly AN-4 but that maybe overkill and flood the top end.
Thoughts anyone?

[steve murdoch]

I read through this old thread on top-end oiler kits.
There is no actual hose sizing and yes i realize it is for the 16 valver but there is some discussion on amount of flow.
It MIGHT be of some value to you.

http://www.thegsresources.com/_forum/archive/index.php/t-120828.html

[Nessism]

You can install a set of oil pump gears from a 750 to increase oil flow to the top end. That's about all you should have to do, and even that is not typically needed.

[Agemax]

You can install a set of oil pump gears from a 750 to increase oil flow to the top end. That's about all you should have to do, and even that is not typically needed.

already fitted the 750 oil pump gears. the top end oil feed is extra precaution for an upgraded top end.

[Nessism]

The 8V engines have those pockets in the head so every time the cam comes around it dips into a pool of oil. Adding more oil to the pool won't improve lubrication, it will just increase the amount of all that is spilling over the pockets and falling down the cam chain tunnel and onto the crank, increasing windage.

Running an external oil line could have a small benefit of reducing the tenancy for oil leaks at the head gasket studs. Not sure it's worth all that extra complexity though. The way to reliability is to keep the system as simple as possible with the minimal number of joints in the system. If you insist regardless, the -3 size lines should be fine. Same size as brake lines. That's what most 16V top end oilers use anyway.

[GregT]

already fitted the 750 oil pump gears. the top end oil feed is extra precaution for an upgraded top end.

Not really needed IMO. We've been roadracing our 1000 for several seasons now using cams with more than .440in lift and good springs....750 oil pump gears and the standard feed system. No problems.

[Agemax]

Thanks for the input. 3-AN it is then .

[GregT]

Thanks for the input. 3-AN it is then .

You're a total bling-hound aren't you, LOL....Red fittings to match the clutch cover bits ?

[Agemax]

You're a total bling-hound aren't you, LOL....Red fittings to match the clutch cover bits ?

haha, no red bits on the white GS any more.
This is for my new build, no bling on this one.

[storm 64]

Not really needed IMO. We've been roadracing our 1000 for several seasons now using cams with more than .440in lift and good springs....750 oil pump gears and the standard feed system. No problems.

That's nice to know👍

[Wraith]

Did this on my old GS1000, used brake line hose AN-3 the motor was 1100cc hi comp, Anderson S3 cams under bucket shims HD valve springs ported CV head gsx750et (4v) oil pump gears, CR35mm carbs etc,etc. Didn't need the external feeds but they looked good and made the bike stand out abit more, and why not :-)

[gs58]

There is also the advantage of having cooler oil going to the cams rather than having it heated as it travels up the studs.