Kagama Lee Spring Servo Saver Spring - What you need to know

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Actually fitted the Lee spring to my Kagama last night, hilarious it's taken so long considering I sell them. Fits great, bit awkward to fit as you need to compress it to get the red collar on but the vice sorted that out.

My god what a difference! Haven't driven it yet but I can tell it's going to be good.
 
Fireblade said:
Actually fitted the Lee spring to my Kagama last night, hilarious it's taken so long considering I sell them. Fits great, bit awkward to fit as you need to compress it to get the red collar on but the vice sorted that out.

My god what a difference! Haven't driven it yet but I can tell it's going to be good.
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It's well worth the effort. 10 minute job - fit and forget! 👌👍
 
Fireblade said:
Actually fitted the Lee spring to my Kagama last night, hilarious it's taken so long considering I sell them. Fits great, bit awkward to fit as you need to compress it to get the red collar on but the vice sorted that out.

My god what a difference! Haven't driven it yet but I can tell it's going to be good.
Click to expand...
You don’t know until you know so much more a positive feeling & it’ll actually turn , most manufacturers offer stiffer springs especially those that do race kit’s surprising corally don’t.
 
Hear me out. What if you got rid of the servo saver and just put a giant scale servo in there? On it's side it would fit and you could relocate the radio box to in front of it under the servo link.
 
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Atomic Skull said:
Hear me out. What if you got rid of the servo saver and just put a giant scale servo in there? On it's side it would fit and you could relocate the radio box to in front of it under the servo link.
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I can't see there being any way it would fit - there's an enormous difference in size - or why a servo with even more torque would be desirable.

Servo-_-Actuator-Sizes-Hero_77b6f87c-3a68-4481-813d-a369134476f2.webp


My standard size servo has 45kg of torque servo and is already huge overkill. 0.08 sec speed is welcome though.

But even if we ignore the logistics for a moment - large scale servos also benefit from having a servo saver - my Baja has one. Off road vehicles need them because they're always being subjected to impacts.

Regardless of what a servo might need for longevity, you still need to consider the forces being transferred through the Ackerman plate, track rods and joints, all shoe-horned under the front brace and right up against the transmission. There's very little clearance as it is.

I conclude that servo savers are only optional in much lighter rigs - typically racers - where the users are expected to have minimal crashes in pursuit of consistent lap times.

In 1/8th rigs off road, or especially bashers, we need a functional servo saver. This necessitates the right kind of spring, which I believe has already been deduced.
 
Horatio said:
I can't see there being any way it would fit - there's an enormous difference in size - or why a servo with even more torque would be desirable.

View attachment 11055

My standard size servo has 45kg of torque servo and is already huge overkill. 0.08 sec speed is welcome though.

But even if we ignore the logistics for a moment - large scale servos also benefit from having a servo saver - my Baja has one. Off road vehicles need them because they're always being subjected to impacts.

Regardless of what a servo might need for longevity, you still need to consider the forces being transferred through the Ackerman plate, track rods and joints, all shoe-horned under the front brace and right up against the transmission. There's very little clearance as it is.

I conclude that servo savers are only optional in much lighter rigs - typically racers - where the users are expected to have minimal crashes in pursuit of consistent lap times.

In 1/8th rigs off road, or especially bashers, we need a functional servo saver. This necessitates the right kind of spring, which I believe has already been deduced.
Click to expand...
I was thinking that the larger gears would be stronger especially if it's one of the Promodeler servos with double wide hardened alloy steel gears. idk about the Kagama but a 1/5 scale servo could be fit in an Asuga on it's side with enough room for the receiver in front of it under the servo linkage.
 
Atomic Skull said:
I was thinking that the larger gears would be stronger especially if it's one of the Promodeler servos with double wide hardened alloy steel gears. idk about the Kagama but a 1/5 scale servo could be fit in an Asuga on it's side with enough room for the receiver in front of it under the servo linkage.
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I think larger gears would be able to spread more of a load, but sudden impacts may still be able to damage the servo or other components of the steering. 👍
 
It is possible for the lee spring to unscrew itself. I had it tightened to show three threads past the nut and it gradually came loose over the last couple weeks and finally reached the bottom earlier today.
 
Atomic Skull said:
It is possible for the lee spring to unscrew itself. I had it tightened to show three threads past the nut and it gradually came loose over the last couple weeks and finally reached the bottom earlier today.
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Had mine on the last couple of years - it hasn't budged with mine.
 
Fireblade said:
bit of an fyi, my mate just tried to fit it in the ADU steering saver arm and it wouldn't fit in properly so when the collar was screwed on with no threads showing there wasn't any movement left.

https://www.aliexpress.com/item/1005006883887818.html?pdp_npi=4@dis!GBP!￡14.99!￡14.99!!!133.48!133.48!@210390c217748733802784421efc37!12000038611996886!sh!UK!2740334636!X&spm=a2g0o.store_pc_allItems_or_groupList.new_all_items_2007616092910.1005006883887818

that part
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Different diameter or depth? Could try gpm servo saver, I didn’t really like mine tbh corallys is best but twice the price. Or alternatively the springs I use from AliExpress available different lengths/diameter might be cheaper solution.
 
I tried hpi harder spring before had similar issue internal diameter was just a bit smaller & sat on lip of nut & was super tight to fit. Here’s spring I used don’t know if could make that work.

I just found this on AliExpress: | 5 Pcs Wire Diameter 2.0mm Compressed Springs Cylidrical Coil Compression Spring Return Release Pressure Spring Steel Coils 65Mn
https://a.aliexpress.com/_EIwxnKo
 
If go to smaller diameter might have issue I did with hpi spring it sat on lip of nut. Could grind that lip off I suppose or just use a 17mm nut.

IMG_6716.webp
 
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