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mike15 · 04-08-2004, 01:29 PM

hi guys i was thinking of upgrading my fury expert 2 an extreme and putting in a ys80 or 90 in it. what parts would i need to make it an extreme and what would be the best gear ratio for it.
mike

DavidH · 04-08-2004, 02:33 PM

Mike
For YS 80, the best gear ratio in my opinion is going to be 8.45 to 1 for sport style and 3 D flying. Also for the YS 91 8.45 will work also, you just need to keep the head speed at 1800 or below.

Parts to do a conversion towards an Extreme from an Expert will depend on if you want it have everything an Extreme would have.

Here is a list of the parts that are on the Extreme that is not on the Expert

33 inch tail boom, torque tube, tail rotor push rod. 120-60
Metal Tail rotor gear box 120-50
C clip style blade axle and larger thrust bearings in grips 120-70
Longer main shaft with third bearing block 120-80
8.45 conversion kit 119-134
8.18 conversion kit 119-130

The above is the parts you would need to make an Expert an Extreme. The gear ratio kits are for ever which ratio you prefer. I don't think I have missed anything, but the parts above will basically make it an Extreme.

David

mike15 · 04-08-2004, 02:55 PM

cool
thanks david

Buzzin Brian · 04-09-2004, 08:08 PM

There are actually other differences, though some are mearly cosmetic. Like the white strutts on the landing gear. The top bearing on the main shaft is also different. It has two bearings as opposed to one. The tail pitch slider is not the same either. It does not utilize links to attatch to the tail blade grips, but rather a bearing supported block that is attatched with screws on both ends. And it has a metal fan, which is plastic on the Expert. Hopes this helps further.

Ken B · 04-09-2004, 09:36 PM

I did the conversion and it is awesome. I only recomend sell your present fury then buy an extreme. Trust me you will be far better off. The costs will be in your favor and you won't be stuck with that 61 size engine that no body wants.

Buzzin Brian · 04-09-2004, 09:46 PM

I actually do agree with that. Been there done that.

capebob · 04-10-2004, 05:45 AM

Quote:

The costs will be in your favor and you won't be stuck with that 61 size engine that no body wants

What do you do with a used 61. :?: I may try one in a plank

Bob

04-08-2004, 01:29 PM	#1 (permalink)
mike15 Join Date: Apr 2004	expert 2 extreme hi guys i was thinking of upgrading my fury expert 2 an extreme and putting in a ys80 or 90 in it. what parts would i need to make it an extreme and what would be the best gear ratio for it. mike

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04-08-2004, 02:33 PM	#2 (permalink)
DavidH My HF Map location Join Date: Mar 2004	Mike For YS 80, the best gear ratio in my opinion is going to be 8.45 to 1 for sport style and 3 D flying. Also for the YS 91 8.45 will work also, you just need to keep the head speed at 1800 or below. Parts to do a conversion towards an Extreme from an Expert will depend on if you want it have everything an Extreme would have. Here is a list of the parts that are on the Extreme that is not on the Expert 33 inch tail boom, torque tube, tail rotor push rod. 120-60 Metal Tail rotor gear box 120-50 C clip style blade axle and larger thrust bearings in grips 120-70 Longer main shaft with third bearing block 120-80 8.45 conversion kit 119-134 8.18 conversion kit 119-130 The above is the parts you would need to make an Expert an Extreme. The gear ratio kits are for ever which ratio you prefer. I don't think I have missed anything, but the parts above will basically make it an Extreme. David

04-08-2004, 02:55 PM	#3 (permalink)
mike15 Thread Starter Join Date: Apr 2004	cool thanks david

04-09-2004, 08:08 PM	#4 (permalink)
Buzzin Brian Join Date: Apr 2004	There are actually other differences, though some are mearly cosmetic. Like the white strutts on the landing gear. The top bearing on the main shaft is also different. It has two bearings as opposed to one. The tail pitch slider is not the same either. It does not utilize links to attatch to the tail blade grips, but rather a bearing supported block that is attatched with screws on both ends. And it has a metal fan, which is plastic on the Expert. Hopes this helps further.

04-09-2004, 09:36 PM	#5 (permalink)
Ken B Join Date: Apr 2004	I did the conversion and it is awesome. I only recomend sell your present fury then buy an extreme. Trust me you will be far better off. The costs will be in your favor and you won't be stuck with that 61 size engine that no body wants.

04-09-2004, 09:46 PM	#6 (permalink)
Buzzin Brian Join Date: Apr 2004	I actually do agree with that. Been there done that.

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