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Moto problemo your assistance

Hey man
trying a new stunt here, posting clarifications and inviting other experts to do the same with a late model yammi. You want throw in your bit too :)

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I'm game, where?

Posted on Jan 08, 2009

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How to make the Spinmaster Air Hogs Moto Frenzy R/c Stunt Bike work.

If the bike isnt working properly, like short driving time and wobbly steering. lay it on the side with the screws pointing up, unscrew the 4 philips screws, the body is glued together so be careful, with a small flat screwdriver or a knife, bend the body apart along the crack going through the middle. Be extra careful in the lower front part because this is were the battery is placed. When the body halfes are separated, lay the half containing the elecronics and motors so you can axess the parts. Remove all dust and hair and othe forein matters. Take the rear wheel off and slide the tire off.With a small screwdriver press the three locking notches that holds the wheel togeather and separate the halfes. put a small amount of lubrication oil (thin oil) on the gyro axel inside the wheel and on the drive gear and spinn the gyro wheel so the oil gets in to the "bearings".Press the drive gear so it sits tighter towards the wheel (not too tight, it has to spin freely. Put the other half of the rear wheel back and spin the gyro wheel with your fingers as fast as you can. it should balance itself on a flat surface for atleast 5 - 10 seconds. if not put some more oil on the shaft, and try again. When finished dry of excessive oil and put the tire back. Take the dual gear that's in front of the rear wheel off. there is a small shim between this gear and the one that's still on the shaft. put some oil on the shaft and spin the shim and remaining gear so the oil lubricates the movement. put the dual gear back.Remove the wheelie gear ( the one with a stick lying under the bike) put a drop of oil on the gear axel that's underneath the wheelie gear. Spin all the gears so the oil can get inside and then remove the excessive oil with a tissue or something like that.The wheelie gear has a spring mounted on the backside, be sure to get this back right (the small ring of the spring shoul fit on a plastic pin in the body and the bigger ring on the cnter of the wheelie gear), and then put the wheelie gear back so it sits centered and conected to the second gear.Put the rear wheel back.Take the other body half and put a drop of oil on the gear shaft thats still in there, spin the gear etc.Put the halfes togeaher, be careful so you get all the axels and pins right and no wires between the halfes. squeese the halfes togeather and screw the 4 philips screws back. Put the driver back and charge the battery. Try it!!!

on Jan 13, 2015 | Spinmaster Air Hogs Moto Frenzy R/c Stunt...

2 Answers

How do you replace the propeller on the Air Hogs Sky Stunt, Blue?

To replace the Propeller on an Air Hogs Sky Stunt plane (I got this from their customer server number):
1.) Hold the propeller and turn the nose (at the grey plastic edge, not the rubber) counter clockwise (aka left) until the nose unscrews.
2.) Slid off the OLD propeller.
3.) Slid on the NEW propeller (You will notice there are slots on the propeller mount), need to line up the propeller with those slots.
4.) While holding NEW propeller, screw the nose back on (similar to step # 1) clockwise (aka right).

Hope this helps someone else.

Mar 15, 2013 | Dolls, Playsets & Toy Figures

1 Answer

Moto frenzy rc bike. fully charged. rear wheel won't turn. front will go left/right.

I also had this problem during christmas. The bike worked only the first battery then the rear wheel stoped turning. The dissapointment was huge. And I read that there are a lot of people around that have the same problem. So I tried to fix it
The problem was a wire that was wound up in the main gear of the rear wheel. This wire cames from the inside of the bike, so I can imagine that a lot of people will have this problem.
So how to fix it?
It is quite simple to remove the wire parts from the gear. But it is not so simple to open the bike. There are 4 screws but when removing the screws and you try to open the bike it will not open.
The reason is that the gas cap on top of the bike is glued in. So i worked a little bit around of this cap with a stencil scalpel knife. But be careful right under the cap are the wires for the steering wheel. So dont go too deep. Once opened you can easy remove the rear wheel and the gear to find the ugly wire wind up on the main gear. In my bike the wire was directly in the small gear on the main motor. It took a while to remove all parts of this wire.
But once removed the wire the main motor will turn again.
Put all gears in the right places and close the bike.
In my case all things are fine after this repair.

Good luck


Dec 25, 2010 | Spinmaster Air Hogs Moto Frenzy R/c Stunt...

1 Answer

I have a new Super Tigre G21-46 engine for which I need a manual or break-in instructions

No real need for a manual, but you could try the various swap meets around your area. By Swap meets, I mean the ones intended for Model Airplane enthusiasts, not the "Generic" redneck meets. But on to your dilemma:

These engines were designed in the early 60's and only became popular in the 70's. For the Control line stunt guys, this was the engine "To Have" for a time. Out of the box, they gave tremendous power for their weight and gave the consistent type of run the Stunt crowd craved. I can only assume you intend to use it in an R/C application. You may consider listing it for sale if it's NEW in BOX, or at least New (w/o box). They can fetch a nice price online, especially Ebay.

Be that as it may, here's the break in. This engine features a Chromed liner, but is NOT ABC/AAC. It has a ring that must "seat" in order for it to provide good long lasting service. It's not a High reving motor, quite the opposite. It likes to run in a mid-range of no more than about 13.5 -14,000 Rpm. It can also, once properly broken in, swing up to a 12 inch prop, but it won't spin it fast, certainly not like a modern OS .46AX or .45FX, The internal timing of the venerable G21/46's is really mild... Think of a FOX .35 on steroids, .....real steroids !! You can also think of it as a 2-stroke engine, that can behave like a 4-stroker. Don't put a prop on it and go for that MAX RPM scream. It'll scream alright, right before it breaks....

Definitely use CASTOR oil in your fuel to break it in. Synthetics will gall the piston liner unless you are extremely careful. Read that last statement again. VERY CAREFUL. Use no more than 5-10% Nitro, at least 25% Castor (for break-in) and the rest Methanol. This fuel is usually special order from most Hobby Shops. dON'T TRUST WHAT THE HOBBY SHOP COUNTER HELP WILL TELL YOU, UNLESS THEY HAVE FIRST HAND KNOWLEDGE OF THIS MAKE AND MODEL OF ENGINE......Usually They will try to sell you something that is ALL Synthetic. Don't bite at this. A $18 gallon of fuel will ruin a $140-200 engine. Pristine examples can sell for that much...This engine was probably made before they were born. It MUST HAVE Castor oil in the fuel. Run the engine in short 2 min. runs, always in a rich sloppy 4-stroke type run. Don't lean it out much. If you lean it so that the sound is a steady 2-stroke "Song", then richen the needle setting until it sounds strong, but rich 4-stroke rhythm. 2 Minute runs, cool completely, another run, repeat until you have about 1/2 gal thru the engine. Use a 10-6 prop for break-in, or a prop cut down to 10". After you put a least a half gallon of fuel through it, you can lean it out progressively, but err on the rich side. This takes some time, but the reward is pure magic.

After break-in, you can substitute some (I said SOME) of the oil for synthetic, but not much. Oil content should be at least 22% with at least 18% of the oil as Castor. Lot's of stunt guys used up to 25% oil, strickly for cooling and consitency of the run. It also prevented any sort of damage if you got the needle too lean. Parts are Very very difficult to come by, usually only from the expert motor shops and special re-work stunt guys.

So ask yourself, Do you still want to run this engine, or sell it to a collector or someone that is familiar with the breed. I have 5 of these. They are going in the coffin w/me when I leave this Earth. I will sell most all of my hobby stuff before I'll part with these jewels..


Jul 13, 2010 | Dolls, Playsets & Toy Figures

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