Oil Pump or Premix = Good Cop || Bad Cop

[1976RD400C]

I ran my hot rod RD at 20:1 for a few years. It wasn't bad with the smoke, one belch on the first throttle up after starting. Now 32:1.  When I took the top end off and looked down in at the crank there was a pool of oil in there, no wear and tear of the cylinders and pistons. I think my RZ smokes more on the pump than the RD on premix.

[rodneya]

No pump on my 73 because I have a Banshee based motor in there. I suppose I could get a RZ pump and fit that, but for the price I would have to pay for a RZ pump I will just stay with premix at 40:1.

[Arrow]

This is the good thing with the oil pump, there are some people out there that don't know that the oil pump kicks out the equivalent 20:1 at full bore. And around 90:1 at idle.

There are lots of problems here in the UK at the moment with pumps over oiling. Pumps I've done too. Problem is pattern throttle cables that don't give the correct range on the oil pump part. Causes the pump to over oil in the lower rev range. I just ask people to send me two photos, then tell them to buy a genuine Yamaha cable.

After all, £100 for a cable is cheaper than £130 for two cables.

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[Arrow]

No pump on my 73 because I have a Banshee based motor in there. I suppose I could get a RZ pump and fit that, but for the price I would have to pay for a RZ pump I will just stay with premix at 40:1.

The 73 pump oils more than the RZ350 pump, the conversion is easy. One pump can be made into many different variants.

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[Milan]

Arrow.
You hit it on the head.
Exactly what my engineering mind thought.

The oil pump does variable volume flow wirh rpm.
Hi ratio at idle, lower ratio for top end.

That i could see as a Pro for the pump.

So, benefits to both ways.

How about long, multi tank rides, as mentioned

[Striker1423]

This is the good thing with the oil pump, there are some people out there that don't know that the oil pump kicks out the equivalent 20:1 at full bore. And around 90:1 at idle.

There are lots of problems here in the UK at the moment with pumps over oiling. Pumps I've done too. Problem is pattern throttle cables that don't give the correct range on the oil pump part. Causes the pump to over oil in the lower rev range. I just ask people to send me two photos, then tell them to buy a genuine Yamaha cable.

After all, £100 for a cable is cheaper than £130 for two cables.

Sent from my SM-G973F using Tapatalk

I think one of the problems is the genuine yamaha cables aren't exactly around in the US. The only way to make one is to look up individual part numbers and hope ebay works out.

Is there a way to make a pattern cable work? (mines a pattern high top from yabbits).

[Arrow]

This is the good thing with the oil pump, there are some people out there that don't know that the oil pump kicks out the equivalent 20:1 at full bore. And around 90:1 at idle.

There are lots of problems here in the UK at the moment with pumps over oiling. Pumps I've done too. Problem is pattern throttle cables that don't give the correct range on the oil pump part. Causes the pump to over oil in the lower rev range. I just ask people to send me two photos, then tell them to buy a genuine Yamaha cable.

After all, £100 for a cable is cheaper than £130 for two cables.

Sent from my SM-G973F using Tapatalk

I think one of the problems is the genuine yamaha cables aren't exactly around in the US. The only way to make one is to look up individual part numbers and hope ebay works out.

Is there a way to make a pattern cable work? (mines a pattern high top from yabbits).

It's more of an issue with the UK 4LO and 4L1 models.

Sent from my SM-G973F using Tapatalk

[Arrow]

Arrow.
You hit it on the head.
Exactly what my engineering mind thought.

The oil pump does variable volume flow wirh rpm.
Hi ratio at idle, lower ratio for top end.

That i could see as a Pro for the pump.

So, benefits to both ways.

How about long, multi tank rides, as mentioned

The pump will also vary the ratio, with more throttle opening and the same revs, eg. going up hill. It also provides full lubrication decelerating with the throttle shut.

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[85RZwade]

" Long Range Tourer "

Whats your definition of that, & why not.


Yes I like the idea of 1 mix for all equipment.

It's all relative, right? I rode my RZ from central Washington to Laguna Seca in 1993, something like 16 hours of riding. I suspect many people would call that long range...certainly longer than I would ride that RZ today, but in my little garage, it remains my everyday rider for short or long distances. It's on the pump, so I can throw a bottle of oil in my bag and just try to find a gas station with decent fuel. I envision my LC being more of a tank-of-fuel duration ride bike, and maybe I'll change my mind about that.
For me, it comes down to "how long is this ride going to be?"
If I were to ride to California again? I'd want something more relaxed, comfortable and better appointed.

[Milan]

First time in this thread that this is brought up:

"I can throw a bottle of oil in my bag"

My question is Why?

The bike has a 54 oz oil tank on it.
Why is a bottle of oil needed.

I am planning on either putting the pump back on,

or

Putting this item on the bike in the triangle area below the oil tank cover.
Simple push button valve, fitted behind a matching plastic cover.

In that manner I can always access the oil in the tank with a tucked up hose.
Just need a shot glass, coffee cup, soda bottle, etc...

[Striker1423]

Safe to assume if he's riding any kind of distance, 2t oil gets pretty generic when bought at gas stations. If you want to run a specific type and your oil tank runs low on long trips, what else can you do?

[85RZwade]

Yes! Easier to carry your own preferred oil than to be the guy who has to find a bike shop open on a Sunday morning that has someone working who knows what injector oil is. I'm not terribly picky about oil, but Ace Hardware outboard mix isn't going in my little tank.

[Milan]

Misunderstanding here.

The oil is in the bikes tank.
Your preferred oil.

The bike will use that oil whether it is going thru the pump. or you drain some with the push valve to make your premix.

Oil tank has 54 OZ in it,
enough to make 18 gallons of premix @ 3 oz per gallon.
18 gallons x 50 mpg ( guess) = 900 miles

So you would need to fill up the oil tank for long trips over that, regardless which way it is used.

So for the premix way, you just would not have to carry small bottles of oil.

[Striker1423]

I understand that basically pumps oil into something you can then dump in the tank.

I think you might misunderstand the mileage of these bikes and the capacity of the oil tank over a long period of riding.

When setup at stock my bike got roughly 34 miles to a gallon. I'd make it around 100 miles before needing to gas up. Oil consumption was roughly 1/4 of a tank of oil. Seems high, but that's about how much oil my bike used.

If I rode on a 200 mile one way rip, I'd have to bring an extra quart of oil just in case the tank ran too low.

Oil consumption on these bikes is actually pretty high from my experience. Could be my oil pump, but I've never had another one to compare it to.

[m in sc]

ive seen people try to use the tank as reservoir for premix, its always a pain in the ass unless you add a higher flowing valve or spigot.   

I always carry spare oil under the seat just in case. or in a tank bag. I carry 4 oz nygalene (sp?) containers with them marked off in oz measurements, they fit nicely in my jacket pocket if i need to do a refill. On the grom thats premix, i can carry 8 oz under the seat in 2 separate bottles.

Or, just run the pump. way easier.

https://www.amazon.com/Nalgene-Wide-Mouth-Rectangular-Bottle/dp/B0088LOTS2