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The Official FX Royal Racing Engine Thread

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Old 01-08-2017, 09:24 AM
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The K3 is probably the best buggy engine I have ran to date. The bottom might be just a little soft for truck though. I'd probably run a K5 in truggy.
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Old 01-10-2017, 03:01 PM
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Agreed. The K3 is a great buggy engine. Nice and linear without lagging and grunt to pull a large jump right out of a turn. Very manageable, you want more, pull more trigger.

Coming off a Ninja B03/ OS2101 this motor matches bottom to mid but carries a touch more top. Also seemed to have better mileage for being fresh also, matching the best runtime I had with the OS but the K3 only had a gallon on it. Runtime should only improve.
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Old 01-11-2017, 01:17 PM
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+1 for K3 in buggy. Mine has been really good, run in was easy and it tunes super easy as well. Gets 9mins easily on a conservative tune - In saying that there are a lot of variables to affect what sort of run time you will get...
The best part for me is the smooth note it sings with the 2131 pipe
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Old 01-29-2017, 03:41 AM
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Where is the cheapest place to get a k3 stateside or can you get them here yet?
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Old 01-29-2017, 07:53 AM
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Originally Posted by brokenmoto View Post
Where is the cheapest place to get a k3 stateside or can you get them here yet?
Not sure who has them cheapest but I have them in stock at www.rwmods.com

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Old 02-06-2017, 06:02 AM
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What other venturis will work in a K5? I can't seem to find anywhere in the US that sells the FX venturis
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Old 02-06-2017, 07:11 AM
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os/nova type work.
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Old 02-06-2017, 10:07 AM
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Originally Posted by JJG690 View Post
What other venturis will work in a K5? I can't seem to find anywhere in the US that sells the FX venturis
RC america should have the ones you need in stock. Just give them a call.

http://www.rcamerica.com/

(214) 744-2400
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Old 02-09-2017, 02:43 AM
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Default Removing the head shims

Hi,

I'm running the K5 for almost 17 liters now and the engine still runs strong and is really, really easy to tune.

Last week I read through the manual and found that a head shim should be removed after running in. Somehow I ignored this till last week. Then I change the shims as recommended in the manual and this makes quite some difference. The engine does now accelerate quicker and feels even stronger.

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Old 03-23-2017, 11:58 AM
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I have taken my FX K5 apart and have a qustion regarding head button (Combusion Chamber Sealed) direction when installing.
In youtube videos for other engines I can see that the head button need to be in a special direction. However, I cannot see any direction on my engine.
Am I missing somthing?
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Old 04-26-2017, 05:01 AM
  #1646  
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New FX B301 new 3-Port engine.
https://www.facebook.com/fxengines/p...type=3&theater
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Old 04-26-2017, 04:59 PM
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Default buggy engine

I have the original 5 port and everytime I try a smooth buggy engine I don't like it. When I hear comments that say its a good buggy engine I think ok it doesn't have enough torque. haha I'm really just kidding around. I do like the 5 port with a 9886 pipe.
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Old 05-02-2017, 05:20 AM
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Originally Posted by Mauritsius View Post
I have taken my FX K5 apart and have a qustion regarding head button (Combusion Chamber Sealed) direction when installing.
In youtube videos for other engines I can see that the head button need to be in a special direction. However, I cannot see any direction on my engine.
Am I missing somthing?
with FX engines, it does not matter what way you replace the button.
its completely symmetrical in the radial orientation.
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Old 05-15-2017, 05:29 AM
  #1649  
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should be getting the new B301 engine this week.
coupled it up with brand new medium manifold and 2131 pipe, which the hudy factory recommends.

will let you know of the break in and get a few pics up.
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Old 07-07-2017, 07:43 AM
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Is this the new B301

I know its say FX K301 just thinking the B in another language K


FX ENGINES FX650101 FX K301 - 3 PORTS, DLC, CERAMIC BEARING @ 319.99 | RC DisCo
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