Yokomo YZ-10 Rebuild

[rcnj]

Hi everyone -

We have a slightly busted Yokomo YZ-10 purchased by me in NJ USA during the 1990s, photos below. It was amazing until I crashed it into a car tire, causing the graphite front shock tower to break and also bending a front drive shaft.



That is how it sat until now. I have rescued it from eternal storage and would very much like to get it running again with my 8 and 5 year old children. They could tell a mile away this thing is awesome, and they are right!



So we come to your forum in search of wisdom before we begin...

If we rebuild the differentials, how should we clean the metal and plastic parts before reassembling?

What kind of grease should I use?

What kind of oil for the shocks?

Anyone know where I might find front universal drive shafts for sale?

It has a red Twister motor, which might be stock. The motor has instructions for how to clean and lubricate it, which we are planning to do before putting into service. Good idea?

Anything else we should do before trying to run the car?

I have the pretty sweet Pro-Tech charger for Ni-cads, so I was planning to get a couple of 1800mAH Nicd packs, which are very affordable.

Does the YZ-10 require a "split pack"? Any reason why I can't split myself a 6-cell nicd pack?

What is the full proper name of our particular YZ-10? Is our car the same as the 870C Super Dog Fighter?

I stupidly misplaced the manual for our car somewhere along the way... The only instructions I have are for the 870C Super Dog Fighter, which looks pretty dang similar, but it's hard for me to tell.

Anyone know where an owner's manual for our car might be for sale?

Thank you in advance for any help!

Brian

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[DennisM]

I fall in love, everytime I see that boxart picture.

It´s no problem to build your own saddlepack battery. I´d recommend using 75 watts and up soldering iron, so you can have a short as possible heating periode.

Diff lube for the differentials - degreaser to clean it with. If the metalplates are rusty, You can sand them with some fine grit sanding paper (400 - 1200 grit)

Good luck on the resto

[jwscab]

That model is the 870c for tracking down parts. Lots of stuff on eBay usually. Often used but in good shape, it's the most common model especially in US so that makes it slightly easier.

[jwscab]

Check out the yokomo timeline thread for more info regarding the naming convention.

[rcnj]

Thank you!

We're going to disassemble and degrease the diffs first.

What kind of new grease should I get? Should I just get Super Lube or something at Home Depot?

What kind of oil should I use for the shocks?

I will post photos of progress!

Brian

[rcnj]

Check out the yokomo timeline thread for more info regarding the naming convention.

Based on the timeline it looks like maybe I have a 1988 YZ10? Is that consistent with my box art?

Thank you!

[jwscab]

yes, yours would very likely be a 1988 version based on the wheels and box.

I'm not sure if you have the rest of the front end, but the universal driveshafts I think are pretty soft, you should be able to straighten the dogbone out close enough that you can drive the car around. You won't have an issue with it breaking unless its reall twisted into a pretzel.

the front bulkhead cap will be harder to find in *good* condition, so pricing will be more than you expect.

If you don't have the other front shock, most people updated the cars to use associated .56" units up front. there was also a single shock (not sure if front or rear) floating around ebay with some other shocks in a lot....

[rcnj]

Thank you for all of the information.

I actually have all parts for the front end, except for a new universal drive shaft. I was planning to bend mine back in the meantime, but was concerned about messing something up due to vibration or imperfect fit.

For the grease and oil, I just ordered Super Lube and Team Associated 5435 50 Weight Silicone Shock Oil.

[rcnj]

yes, yours would very likely be a 1988 version based on the wheels and box.

Thank you.

[rcnj]

If you don't have the other front shock, most people updated the cars to use associated .56" units up front. there was also a single shock (not sure if front or rear) floating around ebay with some other shocks in a lot....

Can you please tell me more about the Associated .56" upgrade? After rebuilding my shocks I've realized that one of the fronts is actually damaged, and I do need a new one.

I have searched all over and cannot locate replacement Yokomo front shocks or Associated .56" shocks.

Thanks in advance.

[rcnj]

So far I've replaced the front magnesium bulkhead, front shock tower, all of the shocks, and a couple of hinge pins.

I used the re-release RC10 shocks, which turned out awesome, and were apparently the correct replacement shocks back when this buggy was new.

Now I'm rebuilding the diffs.