Johnny Speed
New member
I am looking for intake flanges with oil injection nipples or some way to add the nipples to the intakes after the carbs like all modern sleds. The 87 exciter injects the oil into the gas line befor the fuel pump-does not get the oil when it should-it is delayed from the time you punch the throttle till it gets the oil it needs! Thanks for any help or ideas!
Johnny Speed
New member
thanks CMAN
vmax-540
Member
I put them on my 83 Vmax and they work great. A lot better for the engine, it get the oil when it needs it , just follow the directions and you will be very pleased with the results!!
Johnny Speed
New member
Do the oil injection nipples get mounted into the rubber carb intake boots? If so are they just pressed through or how do they attach?
I have e set at home id have to look at,could get some pics if ya want but I remember drilling threw the aluminum and the fittings press in
Johnny Speed
New member
Some pics would be great! The picture of a kit shows what looks like a filter in each line-what is it and what does it do? The only kit they show is for the 600 and 700 triple. My 87 has 2 oil lines coming from the oil pump so one for each cylinder should work unless they are not the same volume hence the filters/restrictors?
opsled
Active member
Johnny Speed said:
Modern?
All of Yamaha's top of the line liquid cooled two strokes injected oil into the fuel system before the carbs from 1983 until they quit building two strokes. The Exciter system is as modern as it gets.
Direct injection kits do not change the fuel/oil ratio your engine is receiving. Only the location for delivery. The delay theory is an unproven myth based on a flawed understanding of how an oil injection system works. (been over this many times in many other threads)
Change it if you like but the stock Yamaha system is proven perfect and there has never been anyone who can link an engine failure to it's design. The builders of such kits have however made a bunch of money convincing people to buy them.
opsled
PS, One of the debates here on this subject.
http://www.totallyamaha.net/forums/...4&page=1&pp=10&highlight=oil+injection+opsled
Last edited:
Johnny Speed
New member
Opsled, I have checked the posts on Bender oil injection and I think the stock injection system is ok but I must check that the stock carbs have been updated! Any other updates required other then carb jetting to my 87 570 Exciter? Right now it has 44 mikunis, ported intakes, twin AAEN exhaust?( cone type pipes)oil lines are injected into the rubber intake boots. It is very very loud and can only be road at the lake when there are races. I have another 87 parts sled with stock slide valve mikunis that I plane to use with a single PSI exhaust. Then I would need the specs for the carbs with this pipe and stock oil injection ahead of the fuel pump! Does the porting require more fuel?
Ops-
I read the thread linked, and I may not know much about anything, but what I read a lot of in there is that everyone is so concerned with the position of the oil cable making things richer or leaner at any given point of cable travel, but what everyone is forgetting is that the throttle cable is also moving and adding or subtracting fuel quantity as the cable moves.
What I'm getting at is the way I see everything working is that you are more or less achieving the same fuel/oil ratio from idle all the way up to WOT because both cables are changing the quantity of what they control. As the flipper moves, fuel increases, the oil also increases maintaining the same mixture throughout?
If you're at 50:1 at idle, you are 50:1 at WOT. Or should be. Unless the pump is designed to offer a logarithmic delivery in proportion to fuel delivery.
I'm probably wrong, but this is how I'm wrapping my head around how cable operated oil injection/cable operated fuel delivery combos work. Both cables move at the same time to increase the quantities of what they deliver.
Either way, I'd rather have the said mixture in question mixed by mechanical means, and further mixing through the carb, as opposed to relying on airflow to mix it properly. Seems to me that by theory the Bender kits would not be mixing all that great at the end of the road.
If you looked at it on a bigger scale, in Yamaha's version where the fuel and the oil are mixed by the pump, and through the carb, the atomized mixture of oil and fuel would be in droplets the size of dimes and would burn uniformly. With Bender's version, you would end up with 2 different dime sized drops floating through the air and would have to hope that in that short of an area that enough of them would smash together enough to mix. Seems like a lot to hope for.
In theory, Yamaha's system stirs it up in the pump, then mixes it together more every time it goes through a jet, or changes direction in a carb circuit. It's probably not possible to mix it much more than it already is by the time the mixture spews out. Bender's just dumps it in at the end of the road.
In my mind's eye, Yamaha's oil/fuel mixture is only one thing, and it's always the same. It burns cleaner, more consistently, and every drop burns the same from idle to WOT.
Bender's you are trying to burn 3 things. Fuel, oil, and a fuel/oil mix. Probably ok when air is sailing right along mixing things into the cylinders at WOT and at 9000RPM, but not at idle when the air isn't moving as fast.
Kinda like James Bond prefers his Martini's shaken not stirred. The booze mixes better when it's shaken.
I read the thread linked, and I may not know much about anything, but what I read a lot of in there is that everyone is so concerned with the position of the oil cable making things richer or leaner at any given point of cable travel, but what everyone is forgetting is that the throttle cable is also moving and adding or subtracting fuel quantity as the cable moves.
What I'm getting at is the way I see everything working is that you are more or less achieving the same fuel/oil ratio from idle all the way up to WOT because both cables are changing the quantity of what they control. As the flipper moves, fuel increases, the oil also increases maintaining the same mixture throughout?
If you're at 50:1 at idle, you are 50:1 at WOT. Or should be. Unless the pump is designed to offer a logarithmic delivery in proportion to fuel delivery.
I'm probably wrong, but this is how I'm wrapping my head around how cable operated oil injection/cable operated fuel delivery combos work. Both cables move at the same time to increase the quantities of what they deliver.
Either way, I'd rather have the said mixture in question mixed by mechanical means, and further mixing through the carb, as opposed to relying on airflow to mix it properly. Seems to me that by theory the Bender kits would not be mixing all that great at the end of the road.
If you looked at it on a bigger scale, in Yamaha's version where the fuel and the oil are mixed by the pump, and through the carb, the atomized mixture of oil and fuel would be in droplets the size of dimes and would burn uniformly. With Bender's version, you would end up with 2 different dime sized drops floating through the air and would have to hope that in that short of an area that enough of them would smash together enough to mix. Seems like a lot to hope for.
In theory, Yamaha's system stirs it up in the pump, then mixes it together more every time it goes through a jet, or changes direction in a carb circuit. It's probably not possible to mix it much more than it already is by the time the mixture spews out. Bender's just dumps it in at the end of the road.
In my mind's eye, Yamaha's oil/fuel mixture is only one thing, and it's always the same. It burns cleaner, more consistently, and every drop burns the same from idle to WOT.
Bender's you are trying to burn 3 things. Fuel, oil, and a fuel/oil mix. Probably ok when air is sailing right along mixing things into the cylinders at WOT and at 9000RPM, but not at idle when the air isn't moving as fast.
Kinda like James Bond prefers his Martini's shaken not stirred. The booze mixes better when it's shaken.
opsled
Active member
GD23RTF2 said:
Bingo!!, Bravo!! and well said...
Johnny Speed,, I am not much of an expert on the EX 570's and yours has some serious mods so I really don't have much to give you on info.
Good Luck,
opsled