we will be testing this weekend with the shimming of the rear diff willl post results after the weekend

Good luck my friend , have fun !!!

Today we ran about 30 minutes with no problem we will post after tomorrow qualifing

Peter , can you please post the step by step build up of the rear diff. and the shimming ? , thank you brother and good luck!!

Yukiyu

So far this is how we shimmed the diff, we put a .3mm shim5x7 inside the diff on the outdrive shaft on top of the supplied shim
Before the pin install. So far no problems after half a gallon.


We also shimmed another diff diferently but won't be able to test till next weeks race in conn. We will post the results here.

sorry to say that i have no problem with the diff after 2 race in johor malaysia
actually my problem is looking for better setting,conner to big anyone have good setting to share t.q bro

Hey guys,

I also built 2 new diffs for yesterdays club race. I doubled the standard shims on each side. Rear diff felt a little tighter but they ran fine all day.

Qualified 2nd and won the 30min A final by 3 laps.

I pulled apart the diff I blew 2 weeks ago and it had snapped the main crown gear where the pin sits. I did have a big accident with my car during that meeting so I think that may have contributed.

Yesterday I had no accidents at all and diffs ran fine all day.

yesterday bashing then hit fencing column at the top,but then use hand and hammer to repair it and bashing again hehehe car very fast at top...

You can user softer front diff oil or harder rear diff or change caster settings or another body or..or...or...

Noob question... is this kit really a limited edition?

the limited edition is because it comes with extra set of lower arms and the option spur gears.

What's happening with that car? I haven't see wet any good race result. Many companies have release a lot of optionals for many cars but nothing for R4 wet.
The car does not need many optional. Just an aluminium brake holder and....harder diff gears.
I read many dissapointing comments for the rear differential and i didn't see any interest fron kyosho.
A lot of racers who waited to buy a new car (like kyosho R4) now are confused.
I hope to see a solution very soon.
Also I hope to see burst of victories.....

I happen to be sitting in that boat
That's why Im heading towards getting a 733 evo.

If I was to get the R4, I would scour this thread to see if there is anything else I would need to do apart from making sure the rear diff is nice and snug-fitting.

I have only had 2 issues with the car. The first was the clutch nut coming loose. Easy fixed with some loctite.

The 2nd issue was the weak diff gears. I have been told that the hardened diff gears will be released by Kyosho sometime in June.

In terms of getting a 733 I think you will have more problems than this. I had a 733 last year for about a month and the list of problems with the car were almost 2 pages long.

Didn't you win on debut with your 733 ?