I have a 5625 in the steering position in my 1/8th buggy. I think 131oz is enough but I wonder if I don't have a faulty servo because it steers only slightly stronger then the JR590z it replaced (now in the throttle position).
Other guys I race with are using 120oz servos that seem to steer better. My linkage is clean and free.
Any ideas?

It could be a couple of things.

1) If you are using alkaline batteries to power the receiver/ servos, they cannot provide enough amperage to higher torque servos. Solution: use a good rechargeable NiCad or NiMh receiver battery.

2) If using an AM radio system like the ones that come in RTR kits, they usually have a BEC circuit built into their battery port on the receiver. Solution: plug the battery into an open channel other than the battery port on the receiver. If you do not have an open channel then use a "Y" harness to connect the battery and servo into a channel other than the battery channel on the receiver.

3) There is a remote chance that you could have a defective servo- it happens to the best of them- but check option 1 and 2 first as this is a common question we get that is usually remedied by one of the two options above.

I'm running a 5cell NiMh receiver pack with a JR XS300 receiver. Both are new. I am running the battery into the battery port but the receiver has a 6v BEC. Would that cause my voltage to be lower then the 6v provided by my battery?
I have the service paperwork, do you recomend that I send the servo in for inspection?

The voltage of the circuit is ok but the amperage that the receiver will allow through the port would be the problem. Solution #2 from my above post should solve your problem.

I'll give it a try. Thanks for the help Brendan.

Hi Brendan, I brought this information to a forum that has alot of pro's that frequent it and found out that JR receivers are unique in that their BEC's are 5 volts, not 6. I haven't re rigged mine yet (the rx from the gas car is in my 1/10th buggy) but the conversation I got going has everyone over there changing their setups to what you recomended and reporting big performance gains.
Thanks for you expertise Brendan.

Glad to help.

Brendan, Can you confirm if the same amperage problem exists with the JR RS310 Synth receiver????

BTW I just plugged the batt into the aux channel of my RS300 RX and my new Hitec 925 (throttle) and 945 (steering) in my REVO really woke up! Thanks for the expertise!

The Grinch

I wouldn’t think the JR synthesized receiver would have a BEC circuit as usually this is only found in AM receivers. If you have the synthesized receiver you can test it to see if there is any performance difference when you plug the battery into a different channel.

Brendan, The RS300 IS the "standard" size JR Synth receiver. It definately showed improvement when the batt was plugged into the Aux channel. (See previous post)

The RS310 is the newer/smaller version of the same RX but I have heard JR was able to miniturize it because they left out the BEC circuitry on that model. (not sure if this is a fact)

Thanks for your help.

The Grinch