bender direct oil injection kit

yamaha_snopro

yamaha_snopro

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Northport, MI
has anyone used this kit. im thinking of getting one for my 1997 sx vmax 600. are there any advantages of using this kit? any gains? any imput would be great. :2strokes:
 
I agree. I bought a 01 SRX with this installed. The center cylinder melted on the previous owner because the little oil tube to the center carb kinked. I found this to be the culprit when I took it apart after I got a smokin' deal on it blown up. I have since gone back to stock and don't notice any difference but peace of mind.

Not worth it IMO! :letitsnow
 
I used it on my 98 Vmax 700 with no problems! ya gotta make sure that you follow the directions when installing it. Seemed to foul less plugs! A kinked oil line is an installion issue not the parts fault. My buddies run this on there SRX's and beat the crap out of them with no problems.
 
There is no performance gains with these kit. It allows the oil to be pumped in to the intake system with engine RPM instead of being mixed with the fuel in the carbs. It is kind of a safety item if you are running lean jetting. Hope this makes sense. Jeff Wurl
 
Direct oil injection/jetting trouble

I have one on my SX 700 that someone gave to me. I got the sled as a fixer so never tuned it without the direct inj. The problem I have is that I have PSI's on and to get this thing to run my jetting is way under what PSI recomend or what anyone else on pipes are running. I cant figure out what is making this motor so rich other than not pushing that oil thru the jets. All my setting are leaner than stock pipe settings. Has anyone else experienced this?
 
jwurl said:
There is no performance gains with these kit. It allows the oil to be pumped in to the intake system with engine RPM instead of being mixed with the fuel in the carbs. It is kind of a safety item if you are running lean jetting. Hope this makes sense. Jeff Wurl
Click to expand...

that alone, is not going to save an engine from lean jetting, due to wrong jets, air leak, etc.
 
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cheapsx said:
I have one on my SX 700 that someone gave to me. I got the sled as a fixer so never tuned it without the direct inj. The problem I have is that I have PSI's on and to get this thing to run my jetting is way under what PSI recomend or what anyone else on pipes are running. I cant figure out what is making this motor so rich other than not pushing that oil thru the jets. All my setting are leaner than stock pipe settings. Has anyone else experienced this?
Click to expand...

the problem is the bender oil injection kit. i know of 2 local sleds that had that bender injection kit on, and they would do nothing but foul plugs. they could never figure their sleds out. one was a '98 srx 700, and he returned to stock and never had a problem since. the other sled is my good buddies '92 vmax4. it has some hauck mild port work, hauck head work, and psi quads. it did have the same bender oil injection kit on it too and he would always foul plugs. he would have to have the pilots leaner than psi said and you couldn't have choke on for more than a second and it would immeditely foul a plug. i told him to take off the oil injection kit, cause of the local srx having troubles and he was then able to run the psi recommended jetting, w/no troubles. you can even play around w/the choke now and it doesn't foul plugs. i feel the oil doesn't get properly atomized and mixed w/the fuel, prior to combustion. you shouldn't have any problems w/your vmax and psi pipes and jetting, once you get rid of that bender oil injection kit, and return to stock.
 
mopar1rules said:
the problem is the bender oil injection kit. i know of 2 local sleds that had that bender injection kit on, and they would do nothing but foul plugs. they could never figure their sleds out. one was a '98 srx 700, and he returned to stock and never had a problem since. the other sled is my good buddies '92 vmax4. it has some hauck mild port work, hauck head work, and psi quads. it did have the same bender oil injection kit on it too and he would always foul plugs. he would have to have the pilots leaner than psi said and you couldn't have choke on for more than a second and it would immeditely foul a plug. i told him to take off the oil injection kit, cause of the local srx having troubles and he was then able to run the psi recommended jetting, w/no troubles. you can even play around w/the choke now and it doesn't foul plugs. i feel the oil doesn't get properly atomized and mixed w/the fuel, prior to combustion. you shouldn't have any problems w/your vmax and psi pipes and jetting, once you get rid of that bender oil injection kit, and return to stock.
Click to expand...


Hmmm...

It sounds like what Polaris and others use for oil injection and I never had plug fouling problems. I assume (perhaps wrongly) that you install oil injection nozzles in the intake after the carb and plumb the oil lines from the pump?

Not disagreeing but it seems odd that it wouldn't work.
 
We used a few of those injection kits over the past years. One was on my Bender ported/piped V-max 4 and another on our Bender 800 SX. We also had one on some stock stuff. We never had any issues with any of them. The idea with the direct oil injection was that the motor would get the right amount of oil based on where the throttle was. For instance if you came off the trail and onto the lake and pinned it, the oil would be right for the motor at wot. Mixing the oil in the fuel pump would give you a different ratio, since the oil/fuel lines would have to be emptied with the trail mix before a wot mix would get to the carbs. Likewise if you were idling on the lake and then pinned it, the carbs would only have that idle mix in it at that pump mix. In theory, it makes sense, because the mix is always right for the motor with the Bender kit. Also remember that oil displaces fuel in the fuel pump, so that is why the jetting is way off when running the kit. But when correct jetting is found, the kit is trouble free.
 
I got rid of the direct inject and still cant quite get it right. Its better way less smokey for sure. That kit dumped oil I had to go 25-26 mm on the oil cable to get close with the right amount of oil useage. Mine never did foul plugs though. I am now at 45 pilots 2 5/8 TO raised engagement a little and still a stumble. Has anyone ever tried removing the air jet and jetting to that. We used to do it on round slides and it seemed to work better. Most likely got better atomization acroos that pilot jet is why it worked well.
 
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