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Discussion Starter · #1 ·
I'm doing the 12k mile service and wondering if I were to simply cut the hoses for the SAI short and block them if that would be sufficient?

I've heard of the SV guys doing this along with some wiring work so the ecu doesn't throw a light, we have the luxury of tuneECU so no issue there.

Thoughts?

I'm looking to do this for 2 reasons, 1 to clean up the under tank area and perhaps use the bracket to mount my new R/R and 2 so I lose the burbbles on decel.
 

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I can't comment on the SAI, but is it a good idea to mount the R/R under the tank, right on top of the engine? I was under the impression the R/R was meant to be placed somewhere it can receive a flow of cooling air. Under the tank is gonna be pretty warm isn't it? I may be completely wrong, so I'll wait to be shot down in flames!
 

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Discussion Starter · #3 ·
Ruby I was thinking the same thing but it looks like there may be adequate airflow where the SAI mounts for it to work. That is where the frame tubes start to separate so I'd think it'd be an improvement. I've seen others on sprints mount theres inside the fairings next to the motor will no I'll effects. And its my understanding that the MOSFET units run way cooler so heat isn't an issue anylonger. That being said my other and more likely install location at the moment will be in the stock location.
 

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Yes you could just cut the SAI hoses and plug them . But what I normally do is pop into AutoZone and buy some rubber block off caps and then safety wire those on ( you could just use aircraft clamps too). And then use TuneECU to disable the SAI.
 

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Ruby I was thinking the same thing but it looks like there may be adequate airflow where the SAI mounts for it to work. That is where the frame tubes start to separate so I'd think it'd be an improvement. I've seen others on sprints mount theres inside the fairings next to the motor will no I'll effects. And its my understanding that the MOSFET units run way cooler so heat isn't an issue anylonger. That being said my other and more likely install location at the moment will be in the stock location.
Redmosquito1. I believe the newer ones do run cooler, so maybe you're right and the heat wont be a problem. Seems a lot of work moving it though, although I'm assuming you have an earlier model where it is mounted near the shock? Just wanted to mention the heat thing, but you'd already considered that. :thumbup:
 

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They still get hot enough to burn you. The side fairing mount works because you get a lot of air flowing through the front of the fairing and then it's forced around the sides. Under the front of the tank doesn't work because there's no exit for the air flow it just piles up in the front and doesn't flow. Besides you really want to keep heat away from the gas tank. Cold gas equals more power.
 

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Discussion Starter · #7 ·
Good point Mac, I guess I forgot to consider the lack of an exit for the air.

I do have an 06 and it is mounted as stated, with the latest developments I'll probably keep it in its current local as I don't have the bracket to move it to the new location.

Maybe I'll scour ebay for one.
 

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I can't comment on the SAI, but is it a good idea to mount the R/R under the tank, right on top of the engine? I was under the impression the R/R was meant to be placed somewhere it can receive a flow of cooling air. Under the tank is gonna be pretty warm isn't it? I may be completely wrong, so I'll wait to be shot down in flames!
Congrats!! you have exactly 675 posts.:thumbup:
 

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Discussion Starter · #13 ·
Cool, thanks Mac.

What if I just got a hose the same size and connected the 2 nipples to it? that'd do the same thing as the plates and save me $60.

Then of course plug the hole in the airbox with a plug. That should do it.
 

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Honestly all you have to do is turn off SAI in TuneECU and it's done. The SAI on these bikes has the physical reed valve under the SAI plate on the valve cover but they also have a solenoid valve controlled by the ECU that only allows the SAI to work at certain rpms and under certain load conditions. By turning off SAI in TuneECU you leave the solenoid valve closed all the time.
 

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Discussion Starter · #16 ·
I know that Mac but I'm looking to remove all that crap under the tank. So if I connect each pair valve to eachother and pull all the crap out and turn it off in tuneecu all will be well with the world.
 

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Discussion Starter · #18 ·
Thought I'd show everyone what I did. I cut the original hose from the air box to the solenoid to fit between the 2 nipples of the PAIR valves. Used the original hose clamps and picked up a hose plug from autozone to plug the airbox hole as suggested by another forum member.

Here's a pic-

 

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Instead of blocking the SAI, use it to your advantage.

At high rpm, the crankcase builds up pressure - even more if you use an oil that foams at higher rpm. This pressure makes more work for the crankshaft to pull down on the pistons, and robs output from the engine.

If you use a short length of hose to connect the crankcase vent to the reed valves in the SAI system, this lets the crankcase pressure bleed off to the exhaust. I've seen as much as 1-1.5 hp gains on the dyno at high rpm from this simple/cheap modification. Yet on some bikes, it shows nothing worth mentioning, but I would much rather vent hot oily air from the crankcase to the exhaust, than to the airbox - especially on a track bike.

Something to consider, and I hope it helps,

-WT
 
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