Lazer zxr tub runner

[rob m]

After racing my Lazer zxr over the winter months for the last couple of years I have decided to treat myself to a fibre-lyte tub chassis.
I have fully dismantled cleaned oiled and greased all the parts ready for the new tub chassis and thought I would share what I have changed to compete in todays world of buggy racing, but still trying to keep the zxr's identity using period upgrades and modified items in keeping with the original car.

[rob m]

First thing is the ball diffs.
I have not felt the need to change anything over the stock kit build. The plates, balls and thrust assembly all work as they should.
I have a few spare diffs so I did take the time to match up the compression washers on each diff to keep adjustment front and rear identical to aid fine tuning trackside.
They have been stripped cleaned and rebuilt using AE lithium and black grease.

[Welshy40]

I use ceramic balls and tungsten carbide thrust and works fine without alteration

[HKS_TRD]

Look forward to seeing this build progress

James what diameter balls and thrust washers did you use, the ceramic balls I got seem to be slightly smaller than the Kyosho ones and are a loose fit in the diff pulley

[alcyon]

Guys..try super lube synthetic grease for your ball diff and thrust bearings.
i find that it works better than ae grease and seem to withstand pressures better.

[rob m]

Originally Posted by alcyon

Guys..try super lube synthetic grease for your ball diff and thrust bearings.
i find that it works better than ae grease and seem to withstand pressures better.

Alcyon if I ever run out what feels like an endless supply of AE grease i have got with new kits over the years, I will give super lube a try.

[Welshy40]

Originally Posted by HKS_TRD

Look forward to seeing this build progress

James what diameter balls and thrust washers did you use, the ceramic balls I got seem to be slightly smaller than the Kyosho ones and are a loose fit in the diff pulley

I think I put the sizes I bought on the ZXR thread somewhere. Yes the big balls are fractionally smaller and just drop on rather than lock in like the original kyosho balls. I think the thrust was the same size.

[rob m]

Originally Posted by Welshy40

I use ceramic balls and tungsten carbide thrust and works fine without alteration

Its not that I need to adjust the diffs to keep them working. When i rebuild the diffs i set them to the same tension front and rear and when at the track I can tweek them to get a desired drive and steering response.
A lot of people do upgrade to ceramic diff balls and are happy with the results but i have tried them in other cars and couldn't see any advantage. I feel they are wasted on me.