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Old 01-14-2007, 06:46 AM   #1
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Default Kyosho Inferno ST US Sports, reviewed

Hi there,

I didn't find a topic about Kyoshos "US-spec" RTR truggy, so I thought I'd start a new one.
I got to do a review on the model and a friend of mine did the english translation:




- General Overview & Chassis

- RTR Accessoires

- Driving the US Sports & Conclusion

It's quite a bit to read, but I think anyone interested in this truggy should get a good impression.

Who else has the ST US-Sports?
Do you drive it just for fun or use it in competitive racing?
And what did you have to do (if any) to make it perform like you expected?
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Old 01-14-2007, 02:51 PM   #2
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They look pretty sweet and are very well priced
http://www.amainhobbies.com/product_...oducts_id/8540

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Old 01-14-2007, 08:43 PM   #3
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Awsome review. I agree the truck is wierd, I have sold a bunch of them at the LHS here and the odd equipment on the truck makes finding compatable parts kinda hard. I tuned a couple of them in for customers and they seems fairly easy to tune, much eaiser than my Werks B3 .21 motor. They are definately cheap though, which is its major selling point, it comes in at $125cdn less than the Jammin X1CRT RTR.
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Old 01-15-2007, 03:11 AM   #4
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Quote:
Originally Posted by WheelNut
Awsome review. I agree the truck is wierd, I have sold a bunch of them at the LHS here and the odd equipment on the truck makes finding compatable parts kinda hard. I tuned a couple of them in for customers and they seems fairly easy to tune, much eaiser than my Werks B3 .21 motor. They are definately cheap though, which is its major selling point, it comes in at $125cdn less than the Jammin X1CRT RTR.
So aren't parts interchangeable between the ST-R?

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Old 01-15-2007, 01:27 PM   #5
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A bunch of the parts are interchangable yeah, but there is a ton of wierd sized and cheap parts on the truck. Just as an example, they didn't use regular style stub axles, they used some wierd 8mm Tmaxxs style ones, and the hex hubs are 19mm, the engine doesn't have mounts (bolts onto the crankcase directly), the exhaust header is a bolt on unit, etc...
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Old 01-15-2007, 02:24 PM   #6
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Quote:
Originally Posted by WheelNut
the engine doesn't have mounts (bolts onto the crankcase directly)
Yeah, they do that with must of the RTR's.

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Old 01-16-2007, 04:15 AM   #7
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hi, I hav a ST US too (GXR28).. what is the average no. of turns normally set for the needle valve? (after break-in)

Is it full 360 degrrees each turn or 180 degrees half turn like inferno 09?
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Old 01-16-2007, 02:24 PM   #8
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Are you talking about how much you turn the needle for tuning? Should usually be 1/8 of a turn until you have it set right

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Old 01-16-2007, 06:22 PM   #9
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hi hi ... yes, sorry for the confusion... i am refering to how much to turn the needle valve setting. How many turns in total after "tuned" normally it would be (as in your case)?

I need some advice...

I noticed the manual says no less than 2.5-turns in order not to damage the engine (I am assuming 360-degrees per complete turn) turns for GXR28 ST US, whereas 3-turns on my Inferno 09 Sirio engine (BUT diagram illustration shows 180-degrees per turn, which equivalent to 1.5-full-turns), and tune 1/8-turns from there onwards like what you mentioned (+/-).

However, I encountered problems, when I tried to use 2.5x full 360 degrees turns, the engine always got flooded and stall the moment I pull the trigger to make it move.

So i am wondering if the ST US manual is refering to 180 degrees instead, and not 360 degrees per turn? Am I tuning it too rich? Kyosho's definition of 1-turn = 360 degrees or 180 degrees?

What to do if engine keep stalling when i pull the trigger?
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