Oil pump? Those who don't run one

Dutter

Member
Mar 25, 2015
102
17
54
60
Can anyone show proof that they have a failed pump? I don't want to hear , I know a guy or I heard type of stuff. I'm on the fence about buying everything I need to do it. I have had pumps on other machines and never had a problem. I could be wrong but from what I read on Internet people just remove them to take the chance of it not working out of their mind. I'd rather not hassle with premix, I've had bikes that way before and hated it.
Thanks!
 
Any pump failure I have ever heard of is from operator error. Failure to prime do to, rolling it over, extended wheelies, not cleaning around the filler cap for the oil or just not having a cap at all and dirt getting in the tank or running it dry. That or having something snag the oil line off the carb or tank . Other than that I have personally never heard of one actually "failing". Only reason I deleted mine was to limit the amount of different fuel cans I needed and be able to adjust my own mix.
 
I had my pump and lines get plugged up! That was almost 20 ago, i was a kid at the time and did not know i had to maintain my oil injection system! :confused:
 
You will be fine running the oil injection system. Good luck finding a fail blaster pump.
I've beaten a dead horse over this one. I have NEVER had ANY issues with the oil injection system on ANY blaster, and I myself run a piped ported cylinder, re-chambered head, matched transfer ports, high compression, CAST piston, and a stock carb. ZERO ISSUES. A bunch of bullsh%t stories out there about the pump failing, or...oh yeah ... the best one... the plastic drive gear for the pump failing. It doesn't happen. I'm sticking with my oil injection BECAUSE OF ZERO ISSUES. The oil injection system on the Yamaha Blaster always get blamed when an engine gets fried, when the actual problem is improper jetting, or an air leak causing a lean condition.
There is nothing wrong with removing the system either as long as its done properly. It lightens the Blaster by a pound or two, and cleans up the looks a bit. Some folks like to delete it because they already have other two stroke engines and only want to bring one kind of fuel when riding. You'll be fine running the oil injection system.
 
  • Like
Reactions: Blaaster
I forgot to mention that the little bit of extra oil that the injection system injects compared to (most) common premix ratios like 32:1 actually gives you a better ring seal. This = more POWER!
 
  • Like
Reactions: Blaaster
I forgot to mention that the little bit of extra oil that the injection system injects compared to (most) common premix ratios like 32:1 actually gives you a better ring seal. This = more POWER!
And that continuous flow of oil from that suspect oil injection system will supply adequate oil to allow you to hold the throttle wide open for a very long time without oil starvation!
 
Ran the injection for 8 very hard years on my first new '96 blaster. Never a problem.
Although I mix now.

Only once have I seen a pic of a broken white plastic gear that supposedly failed ?
 
And that continuous flow of oil from that suspect oil injection system will supply adequate oil to allow you to hold the throttle wide open for a very long time without oil starvation!

Also does an outstanding job on ...VERY difficult,long "down hill runs" when you rarely need to crack open the throttle... still getting that lubricating oil! I run "Maxima Super M Injector". I don't know if that helps, but I'm just saying. Lots of great oil injection oils out there. Stay away from stuff used in outboard engines.
 
Here's a short story I found on the web that I thought you would find interesting...

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
 
I agree. I also believe it has to do a lot with the following...

"I've got to ride RIGHT NOW! I don't have time for that! I'll check that later when I get back" syndrome.

I can't count how many times I've seen lazy, unworthy slobs that don't clean they're air filter, check/change the plug, change the tranny oil, lube the chain, etc, etc for like three or four years on they're atv, and wonder why it runs like crap. Seriously.
 
  • Like
Reactions: dirtysquared