Bill’s Kraton 6s build thread (the Arrma overtime)

[BillCranford]

This thing has sway bars! I got back into RC after many years away. I started back in with a slash 2wd that I upgraded quite a bit until my buddy’s bought 4x4s. So I picked up this V4 new since my slash just couldn’t cut it on the off-road terrain anymore. I’ll update this thread while this journey takes place.

 

[BillCranford]

Kraton breaks an arm ugh
Well third run of the new 6s and boom right on the nose. Used too much brake in the air. 34f that day I’m sure didn’t help either. Installing rpm lower arms video to follow.

 

[BillCranford]

I installed this dumboRC radio. It’s had great reviews on YouTube and is dirt cheap. I bought the 4ch version for under 30 bucks! For a few dollars more you can get a 6ch with gyro. Big improvement over stock V4 radio.

 

[BillCranford]

Sunday fun day
Short video from the weekend. Got together with some buddy’s with traxxas rustler, Maxx, my Slash and a drone.

 

[BillCranford]

New ramp bash day

 

[BillCranford]

 

[BillCranford]

I rebuilt my rear diff today. I had a sun gear pin shear and take out both sun gears (the two larger ones inside the diff). The manual does say to remove inspect and replace the front and rear diff every 20 runs (one run being 5 minutes). So I can’t really fault the kraton. 10k 100k 10k is the stock oils in the V4 manual. One of my sun gears split in pieces forced apart after the pin sheared. The other had a tooth missing, taken out by the pin pieces . I used 20k in my rear rebuild. I have 50k on hand that I’ll put in the front next. I’ll see how it does then with the stock 100k center fluid. I’ll probably go up to 200k or 500k.

 

[Aive]

its recommended to shim your diffs to mitigate gear breakages:

 

[BillCranford]

Thanks I’ve watched a bunch of these. I was up in the air on if to shim the sun gears however decided against it for this diffs first rebuild. One video I watched the maker ended up removing the extra shims he installed because he felt it was too tight. I feel like my shear pin failure That damaged the gear was a result of poor driving really. I’m going to put the stock rear diff Shim setup with 20k fluid to the test and see what happens. Hopefully it’s arrma tough.

 

[Aive]

Yeh I don’t have the personal experience to say if it’s made a difference yet - I’m only a few months into the hobby and haven’t had too many hard hits.

I trust those guys though ><

 

[BillCranford]

Yes. I watched both of Rich’s videos above before I ordered new diff internals. I need to order 200k center diff fluid next. I may buy a complete f/r diff just to have on hand that I can always have built ready to go. Spare parts is a must in this hobby. Some sundays when we get together there’s more tailgate wrenching than we’d like. It’s all part of the fun though.

 

[BillCranford]

How to replace lower control arms with rpm arms after you nose dive your kraton V4 6s. After replacing the stock arms with the more flexible rpm ones, I had front axles pop out of the front diff twice. To remedy that I removed the stock washers between the arms and knuckles.

 

[BillCranford]

Got around to replacing the stock brass bushing with fast eddy bearings I won through this website. Thanks again. Steering is getting weak. I’m hoping this will help. I know the stock servo isn’t the greatest. If the bearings don’t show a big improvement I’ll be servo shopping.

Any suggestions?

 

[BillCranford]

Update: steering still sucks.

 

[BillCranford]

 

[BillCranford]

New ESC same BLX185
25kg servo installed
surpass hobby rx replaces the dumboRC (same compatible)