Originally Posted by Cadman1981
Explain some more, what was happening when using the tamiya DJs with yokomo Steering knuckles??
I came to the conclusion that the yokomo hexes are part of the problem. when you tighten your wheel nut on tight, especially serrated ones, this is where the binding happens...when you take off your tires after, and run the drivetrain with your hands on the belt, you will hear clicking noises as the hexes turn. thats a sign that your bearings are binding.
The Yokomo hexes really pull in the pin and put a lot of pressure on the centre of the bearings.
what I found helped was adding tamiya 5 x 1.5mm shims inside between both bearings inside the hub. This helped prevent the yokomo hexes from pushing the center of the bearings too tight causing binding..
This helped solved my binding issues in the rear using Yokomo rear aluminum uprights.
Tamiya Shim part # is 9804372.
As for the fronts with Tamiya DCJ's adding this shim didn't fix the binding. Although Tamiya DCJ's appear to fit perfect inside a yokomo steering knuckle, once you put the Yokomo hex on and tighten it with serrated wheel nuts, the binding will come back. So I put Tamiya Steering knuckles with the 1.5mm shim between the bearings and used the Yokomo Hex. Tighten the wheel with serrated wheel nuts and Presto!!! No binding. You have to file about 0.3mm off the top of the tamiya steering knuckle to slide in the yokomo C hub. Also you will need to use 44 - 45 mm Ti-Rods instead of the stock 39mm as the Yokomo Steering knuckle arm points closer to the centerline of the chassis, where as the Tamiya arm points perpendicular.
As for the Reaming out:
Since the Tamiya DCJ's "joint" part is thicker than the Yokomos, it rubs against the inner side of the yokomo steering knuckle at full turn radius, causing the "joint" part to ream out about 1mm off the inner steering knuckle.
The Tamiya steering knuckle inner side is shorter than the Yokomo, so no rub issues.
I know it seems like a lot of work to get Tamiya DCJs in, but once in, I found the BD7 very consistent from pack to pack, outing to outing. And best of all no worry of breaking the Tamiya DCJs.
Also getting the CSO front Bulkhead with extra mounting hole, was the icing on the cake to get more steering.
After these mods and upgrades, the BD7 has been the best TC I have ever driven on carpet.
I've tried many TCs, primarily Tamiyas as I love the feel of them, but the Yokomo hands down drives the best.
Hope that helps....