The Truth About Oil Injection.

[xKroniK13x]

I thought I should share this on the forum... not many people have read this and I found it interesting. It was found in lasxgames' "Blaster Websites" thread.

The TRUTH About Oil Injection
What you should know before you block off the oil injector

Nearly everyone complains about the oil injector (Autolube) that comes stock on every Yamaha Blaster. Some say it is unreliable, and will break. Others say that the 20:1 mix ratio puts too much oil into the motor. Many people block off the injector for this reason, there are many kits avaliable to do this.

As a Blaster owner for two years, an everyday reader of the Blaster Central BBS, I belive I have heard nearly every argument for and against the oil injector.

In the past few years I have heard of 3-4 people who say their injectors have gone bad and caused their motors to sieze. Most of the time they do not even consider that other factors could be involved. The just assume that the injector must have quit, every so-called expert says it isn't any good. Still, no one has ever proved that the injector was at fault.

Even IF it was, improper care usually causes failure. I have to wonder if the operator was carfull when he filled the tank up, or if he filled it while the quad was dirty and droped bits of mud into the tank.

I belive the Blaster's oil injection is 100% reliable. While I realize anything, and everything can fail, I do know that the injector system is no more likely to fail than any other engine part.

The fact is, my own 1998 Yamaha Blaster's oil injection system has held up to 5175 miles of use, without a single problem.

The first ATV ever to finish the 6000+ mile Paris to Dakar rally was a 1997 Yamaha Blaster. He ran oil injection, and the quad ran fine the entire time.

I sure hope that dispells the reliability myth.

Most people belive that the Blaster's 20:1 Gas:Oil ratio is too rich. They say the motor gets too much oil. I want my motor to get all the oil it can. The more oil If it costs my 1HP, then fine.

Wait a second, it won't cost me horspower!! I might actually lose power by running a leaner ratio. I know you don't belive it, that's why I have proof. Tests have been done on an lder RM125, and these are the results:

20:1 Gas:Oil ratio (same as a Blaster) gave 23.2HP 16:1 Gas:Oil ratio gave 23.6 HP 27:1 Gas:Oil ratio gave 21.4 HP

At the 27:1 ratio the piston "showed signs of scuffing bad enought to deter me from testing at 32:1."

If you think I made all of this up, take a look at page 169 of Two-Stroke Performance Tuning by A. Graham Bell. The book is avaliable on Amazon.com for a fair price.

Any other questions about the injection system. I have proved it to be both reliable, and that it does not cost power. Now I'll tell you why people say they remove it:

* Looks, they say it looks bad.
* Weight, it weighs a few pounds.

It doesn't look great, but it doesn't look terrible, at least not to me. On a tricked out quad, it might detract from the appearance a bit.

Hmmm... I guess it does weigh 2-3lbs, and full of oil, mabey 6-8. So that's a valid complaint.

There, now I have told you both sides of the story, make your own desicion. I just don't want people to spend their time and money taking off the injector before they hear the other side of the story.

Click the link if you'd like to flame me (or if you have intellegent comments): rockosmith@aol.com
Stolen from Blasterville

To see this in the original text, click Here

 

[tyler1blaster]

I thought I should share this on the forum... not many people have read this and I found it interesting. It was found in lasxgames' "Blaster Websites" thread.



To see this in the original text, click Here

huh i'll be darned................. thats interesting........... was that stickied? if not stick this bad boy! that was interesting kronixs so heres some rep

 

[xKroniK13x]

It was one of the links in his thread. Not many people would have thought to read it, so I did. I found it interesting...

 

[gearhead04]

interesting... 1515151515

 

[darealblaster]

I agree, my old 96 blaster that i sold still had the oil injection and neve rhad a problem with it, and our current 04 blaster still does too and no problem, same top end since it was bought brand new back in 04, same rings,everything. HAs nice comp and runs like a champ. Its all bout maintnance.

 

[xKroniK13x]

Same. Last time we were gonna rebuild mine... it looked brand new. We'll see this year.

 

[mr_3_0_5]

why even risk your motor.. sure run it on a stock jug. but i wont run injection on mine.
for me its about consistency and peace of mind. i know it has oil. do you?

 

[Paulie B]

That was a good read and he has some good points.
I disagree with his claim that it's '100%' reliable- nothing is 100% reliable.
So a Blaster went 6000 miles with it.
It's time that kills them they are only neoprene plastic.
Some of these Blasters are turning 21 years old!
I suppose if you maintain and replace the gear every so often then there is nothing wrong with it.
It's $122 for a new OEM oil pump assembly.

You want 100% reliable block it off and mix your own @ 20:1 if you want

 

[darealblaster]

why even risk your motor.. sure run it on a stock jug. but i wont run injection on mine.
for me its about consistency and peace of mind. i know it has oil. do you?

you cant run it on a 240 kit, BUT on a stock jug i feel safe, how do i know it has oil,simple, ITS SMOKING!, if its not or you dont smell the two stroke oil then YOU should check it, dont blame the oil injection becuz you didnt decide to check it before, in and after every ride. Sure blocking it off aint bad and its 100% reliable as in your getting oil, but me,im too lazy to block it off, when and if the day comes that i see it aint working right ill block it off. All bout maintnace.

 

[Awk08]

bought my first blaster in '96, brand spankin new, next to the day my son was born, one of my happiest ever!!!!, ran it hard and long for 8+ years, lots of that with my ex-girl hangin on the back, keepin up with my bro's on bigger bikes, never, ever did anything to the motor, or fouled a plug, the last plug in it was atleast 5 yrs. old, started 1 -2 kicks every time till the day i sold it, and guarenteed it had more than 6000 miles on it, oil injection still on it and workin good

 

[doc_speeder]

I took mine off because I wanted to KNOW that it wouldn't fail. It's the same reason I wasn't interested in that dudes idea of an oil cooler that was on here a while back. I like simple. Also, we ride in a huge temperature range here, and I just can't believe that the tank of oil will have the same viscosity and injection rate at -20 that it does at +35. (Celsius, of course).
Regarding the oil mix issue: I never wade into the hundreds of threads that start with "what oil should I use?", or "how much oil do I mix?" because everybody (ok not everybody maybe 95%) on here says 32:1. Thats just derived because its easy to mix that ratio. I have always run between 20:1 and 24:1. I tried 32:1 and even 40:1 on my Blaster, but went back to 20:1. If it's properly jetted, it doesn't spooge the pipe, or foul plugs. And yes, contrary to what you may believe, it DOES make a bit more power.

 

[yzrider]

i run 32:1, is that ok, i ahve always been told to run that? i hope i'm not doing anything wrong!

 

[Blasterdude27]

i run 32:1, is that ok, i ahve always been told to run that? i hope i'm not doing anything wrong!

No not at all 32-1 is a great mix to run I personally use it also. But a 2stroke will continue to make more power down to 16-1, this is because 2stroke oil has a higher btu rating then the gas itself.. its basically free power. If you jet for it and run good clean oil it wont clog or foul plugs, but it gets expensive mixing anything richer then 32-1 and thats why most don't.

 

[atvmxr]

my problem with the oil injection is that it is rpm based and depending on the load you could be WFO trying to climb a sand dune or just coasting down the hill and its dumping the same amount of oil in. NFG

 

[Paulie B]

Honestly oil injection is for kids and road bikes.
Before you get offended, who is the Blaster really tailored for?
The oil injection is a fail safe method for Yamaha to make sure kids add the oil the motor needs.
Road bikes like the old RD350 have oil injection strictly for convenience since who wants to carry oil and a separate gas can to mix gas on the road?
The Yamaha Banshee didn't have oil injection and it's basically the same motor as the RD350.
The Honda 250r didn't have it nor the Suzuki LT250 and LT500.
None of the Yamaha YZ's or IT's came with one.

 

[245stroker]

I was wondering why for my go kart motor I've got to run 16:1. I thought it was a little odd to have to run that much oil in a yamaha kt100 2stroke motor but I guess that since they all run it there must be a reason for it.

That is a pretty good point paulie. The same reasoning goes for snowmobiles too. I had an old ass kawaski that was premix and it was a pain to pull up to the pump and have to carry premix oil along

 

[Luni]

Old post I know, but Ive been doing a lot of reading and it seems that 20:1 is favored by MANY people because it actually doesnt varnish as much and it makes more HP and wears less.

 

[brandoz28]

who are these many people? and where?

 

[Blasterdude27]

Actually 20-1 IS the best to run. Many people and big companies have tested different ratios throughout the years and 20-1 makes more power and lasts longer.
Atcually it will make more power right down to 16-1 ( or 11-1... can't remember ) , anymore and your just wasting oil...... But I think anymore then 20-1 is a bit over kill....

I run 32-1 because I'm a poor man

 

[Paulie B]

Well that book was written in the 60's.
No one who cares even uses the kind of oil Gorden was using (conventional)
With syn. oil there is no need to mix 20:1.
Also in this day in age with the fad of 'goin green' the smoke screen of 20:1 isn't gonna go over too well, the 2 strokes have a bad enough rep as it is.
I mix 28:1 in my meth motor and it's fog city but that's pretty much normal for a motor with a 700 main jet lol