Does anyone know of a solution for the HPI RS4 specific servo horn?

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Hairy W Bush

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This is what I am dealing with:
ZLSQSXM.png

listed as a396 but it just comes up as a bunch of parts tabbed together for assembly.
that's exactly what came off the car. The old servo is a 23 tooth and the new one is a 25 tooth. The car uses simple hooked linkages. The extra horns and all that that came with the servo don't appear to be of any use to me.
there's also this in the manual:
aOBRMZq.png

85039 and they suggest to use that if the car can't achieve full throttle

closest thing i found was this:https://www.ebay.com/itm/254917777251 but it's not listed as compatible for the rs4. the attachment holes look slightly larger too
 

Chubaka

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If you need the throttle arm, most traxxas nitros have a t shaped part for the throttle and linkages. Thats the route I would take. Futaba and other servo manufaturers may have a compatible part too.

85029, $20.00
https://www.ebay.com/itm/194245665242?_trkparms=amclksrc=ITM&aid=111001&algo=REC.SEED&ao=1&asc=20160908105057&meid=335fa38b8065458f98739f4aa7f1dede&pid=100675&rk=2&rkt=15&sd=254917777251&itm=194245665242&pmt=0&noa=1&pg=2380057&brand=HPI&_trksid=p2380057.c100675.m4236&_trkparms=pageci:000aa837-0d26-11ed-b1a2-2a40c401d1b2|parentrq:3c4fc8541820a60c134cd95dffff9a62|iid:1

A396 should be servo saver and steering rack parts.
 

tntpoof

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any universal servo saver will work med duty
 

nino

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Yeah, looks like a typical saver. Or just use a horn, don't know why you'd need a saver there.
 

olds97_lss

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Well, it's a split servo saver like the savage uses. The top/bottom of them move independently of each other. I usually replaced the savage one with a more typical slider/spring setup, then you just use whatever horn you need. You need to piece together the linkage yourself and find a horn that works for your servo.

2019-0614-SavageX-Linkage.jpg


I did something similar on my old RS4 NMT when I had it.
2005-0305-NMTThrottleLinkage.JPG
 

Hairy W Bush

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I wasn't sure how to go about a new linkage setup, so I bought another servo, this time a 23t. I ended up needing a new top piece and can't find the bottom. God forbid that fails. It's all installed and car's running properly now. Although the throttle trim doesn't work that great now. oh well it seems pretty good.
 
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