I want to take off the oil tank and use pre-mix can someone tell me the best way to go about this, do I just block off the oil pump or should I remove the oil pump? Is there anything else I have to do?
Also can you give step by step instructions thanks.
Regards k

Can'r really help with the stripping, but I'm interested to know why. Are you going racing?

I kept the oil pump on my race bike and it worked flawlessly. I am always sceptical of those who remove the pump for road use...
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

Dave I want to run with pre-mix because I intend to race the bike
Regards K

Hmm. Are you loosing it for weight or for reliability reasons? As I say, mine was faultless over two years racing, and I do like the fact it oils whether the throttle is open or closed, unlike premix. I figure it's Honda. It works.
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

Dave,

How is premix not adding oil to the fuel when the throttle is closed?

My understanding with premix (and yes, I do run it on all my race bikes 50, 100, and 250 cc's) is that if the engine is getting fuel, then it's getting oil. If for some reason the engine isn't getting fuel, then, well, it's probably not running.

The injector system is great, and I use it on my street bike. It's worked flawlessly for the four + years I have owned the street bike. However for racee use, I do prefer the weight savings, as well as the peice of mind that something else mechanical (and electrical) won't just go out on my while I am at full tilt in a corner.

That's just my opinion, and I'm not saying a race bike needs to run premix, just that I do, and why I do.

Also, I get to use Castrol A747 oil, and nothing smells better then race gas, and A747 :)

Thanks,
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Charles Gallant

Cgallant did you take off the oil pump or just plug it? and if I do the same is there anything I should know?

K,

When I removed my injector system, I

1. Removed the tanks
2. Removed the pump
3. Plugged the hole(s) in the engine case
4. ran a tube from one injector inlet to the other injector inlet on the carb bodies, and had a small bearing in the tube to create basically a plug for the inlet. you could just plug the inlets in anyway you want though.


Ones you go to premix, you may need to bump your mains up to compensate for the different amount of fuel. This isn't a huge increase. Some people say about 2% depending on the pre-mix ratio you run.

I always say, it's best to go high on the mains, and drop them down to find the right setting, rather then run lean, and possible seize the engine.

But look in the tuning section on NSR-WORLD.com for more info on jetting, etc...

Thanks,
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Charles Gallant

Hi there guys.
The only problem with running premix is that when you shut the throttle at say 12500 rpm you are shutting of just about all your fuel which has your oil in it. Now if you are going in top gear at max rpm and shut down for a corner in that short preiod you are getting almost no "fresh" lube into your motor. It is minor though, you still have 2-stroke clinging to your motor parts. With your autolube(injection) the amount of oil being pumped is determined by throttle opening and engine speed. So if you are at max revs and shut the throttle the pump is still spinning a high speed like the motor and pumping more oil because of th increased engine rpm. Run premix with a very good/expensive oil.
Pierre(RGV owner but great respect for the NSR)
South Africa

With your autolube(injection) the amount of oil being pumped is determined by throttle opening and engine speed. So if you are at max revs and shut the throttle the pump is still spinning a high speed like the motor and pumping more oil because of th increased engine rpm.

Controversial point here...


The benefits of pre-mix are:

You always get a constant ratio of fuel:oil, and it can easily be altered (dyno a bike on pre-mix at different ratios to see the effects on power!)

As long as you have fuel, you have oil!

you can run erotic (oops - exotic) oils such as Castrol A747

Removing the injector means one less thing to go wrong!

Removing the complete system is quite a weight saving

All great for the track, however, disadvantages for the road (and sometimes track) are:

Erotic oils tend not to "mix" so well, so fuel doesn't store. Make it - use it!

Inconvenience - just top up the tank with the autolube system!

Run out of fuel = run out of oil!! You better be quick on that clutch lever!!

As Pierre says, shut the throttle in 6th gear at max. speed, and you lose a certain amount of lubrication

But... although this last one is true, keeping the autolube in a racing scenario is not necessarily ideal!

Consider the shutting the throttle down at 120mph/200kmh in top, therefore shutting down the majority of fuel flow to the crankcase (vacuum, power jets, etc. will still supply a certain amount under closed throttle conditions), but the autolube's still pumping oil in at high speed... wind the throttle on and you will not have optimum mixture (and consequently, lose power) until the excess oil is used! Not really much of an issue to most of us... unless you're Roberto Rolfo's up-and-coming little brother I suppose, and then the amount of time with a closed throttle will be considerably less than that of us mere mortals anyway!!! :D

Make sense?

At the end of the day, premix is down more to do with personal preference than anything else these days as, like Dave Ett' says, the modern injector systems are very reliable.

Do you want the weight and convenience, or the sweet smell and consistency? That's really all you need to ask yourself!

Andy.
NSR-WORLD.COM

Consistency? Well surely if the motor only needed a consistent supply, the pump wouldn't increas the flow with throttle opening would it? It does that as the engine needs more oil at high speed surely, and putting a set ratio in the tank will result in under oiling at high speed or over oiling at low?

Or am I barking mad?!
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

Barking mad? No, not at all Dave, but remember the auto-lube is designed specifically for road use and engine longevity.

A manufacturer is going to run the safest variables possible to try and ensure the motor performs well in all conditions, which does not necessarily mean you will get peak performance. Also, a street rider will put the motor under all sorts of strange conditions that, strangely enough, a race bike will probably ever see. Full throttle when luke-warm for example, or long periods of closed throttle.

Take a UK spec' RGV as an example. Just because the UK market bikes were sold as "full power", would you not consider optimising the systems still further or just race it "as-is"? I've seen UK spec' RGV's (well run in) ranging from mid 50's to low 60's in horsepower.

There is an optimum fuel:oil ratio, and it doesn't need to be variable on a racer... it just needs to give peak performance.

Like I say, the subject can be argued 'til we're all blue in the face, but I don't personally think for riders of our ability (no offence to anyone, but if we were that good, we'd be riding GP!) it's not really going to make any difference whether the pump is used or not!

You are as entitled to your opinion as the rest of us though, and far be it from me to say otherwise!! ;)

Andy.
NSR-WORLD.COM

"Like I say, the subject can be argued 'til we're all blue in the face, but I don't personally think for riders of our ability (no offence to anyone, but if we were that good, we'd be riding GP!) it's not really going to make any difference whether the pump is used or not! "

Absolutely
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball