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Yamaha Rhino Engine Swap Discussions Yamaha Rhino engine swap discussions.
Rotax swap, R1 swap, etc.

 
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post #1 of 10 (permalink) Old 12-11-2008, 10:13 PM Thread Starter
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Rotax Throttle body

Well I actually started working on the Rhino tonight and as I was tearing it down I noticed there is like a restrictor plate on the bottom of the throttle body on the butterfly. What does it do, can I remove it and replace the screws?
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post #2 of 10 (permalink) Old 12-11-2008, 11:26 PM Thread Starter
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Well did some research and if you remove it you have to braise the screw holes on the butterfly.
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post #3 of 10 (permalink) Old 12-12-2008, 07:59 AM
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i read somewhere and can't remeber where, but they removed it, and claimed to gain some hp, but you have to remap, then there were arguments about air turbulence in the TB and never really came back with an answer, i did not see the part about brazing the screw holes..

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post #4 of 10 (permalink) Old 12-12-2008, 02:19 PM
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Originally Posted by qwkrhino View Post
Well I actually started working on the Rhino tonight and as I was tearing it down I noticed there is like a restrictor plate on the bottom of the throttle body on the butterfly. What does it do, can I remove it and replace the screws?
Get a hold or MRRPM on here he'll know.
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post #5 of 10 (permalink) Old 12-13-2008, 12:02 AM Thread Starter
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Thumbs up

Here's what MRRPM replied with.

"It's there to make the engine more controllable in low rpm. Yes removing will let it flow more air down low, and if there is more fuel to match, it'll make more power. Even when wide open the little chunk of aluminum is a restriction".
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post #6 of 10 (permalink) Old 12-13-2008, 08:06 AM
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Here's what MRRPM replied with.

"It's there to make the engine more controllable in low rpm. Yes removing will let it flow more air down low, and if there is more fuel to match, it'll make more power. Even when wide open the little chunk of aluminum is a restriction".
How bout that,he's the MAN ,he knows these motors inside and out! Glad he was able to help you out.
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post #7 of 10 (permalink) Old 12-13-2008, 09:27 AM
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so anyone going to take it off!
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post #8 of 10 (permalink) Old 12-13-2008, 02:46 PM
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thats strange my alum piece is on the bottom when full throtle

i'll post a pic your or mine is up side down...................
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post #9 of 10 (permalink) Old 12-13-2008, 07:32 PM Thread Starter
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thats strange my alum piece is on the bottom when full throtle

i'll post a pic your or mine is up side down...................
Mine the same way I took the pic from the bottom of the throttle body.
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post #10 of 10 (permalink) Old 12-15-2008, 06:23 PM
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Upside down or not, it's still a restriction. I don't know how much it'll help, but it won't hurt, at all. A good way to tell, is to remove it and see where the A/f ratio is, in relation to where it was. If it leans out, it has added air, if it's richer, it's taken away air.

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