Cagiva Mito 125: How to Safely Remove the Flywheel (Rotor)

• Cagiva mito 125 for sale here on Ebay UK

Cagiva mito 125 parts for sale here on Ebay UK

Removing the flywheel is essential for accessing the stator, replacing the crank seals, or performing a full bottom-end rebuild. However, the Mito's flywheel is pressed onto a tapered crankshaft and held in place by a woodruff key. If you try to pry it off with a screwdriver, you will almost certainly damage the crank or the stator coils.

The Right Tool for the Job

To remove the flywheel without tears, you need a dedicated puller.

• Puller Size: The Cagiva Mito 125 uses an M33 x 1.5mm right-hand thread puller (replaces Cagiva Part #8000-51614).

• Cross-Compatibility: This same tool often fits certain Husqvarna and Aprilia RS125 (Rotax 122) models.

Step-by-Step Removal:

1. Remove the Nut: Use a 17mm socket. You will need a flywheel holding tool (or an impact gun) to stop the engine from spinning while you loosen it.

2. Inspect the Threads: Ensure the internal threads of the flywheel are clean. Any grit here can cause the puller to cross-thread.

3. Thread the Puller: Screw the outer body of the M33 puller into the flywheel fully. It must be seated deep to prevent stripping the threads.

4. The "Pop": Tighten the center bolt of the puller against the crankshaft. As it builds pressure, the flywheel will eventually "pop" off the taper.

   • Tip: If it’s stubborn, give the head of the puller bolt a sharp tap with a plastic mallet to "shock" the taper loose.

5. Watch the Woodruff Key: As the flywheel slides off, be careful not to lose the tiny woodruff key (the semi-circular metal piece) that sits in the crankshaft slot.

Reassembly Pro-Tip:

Before refitting, clean both the crankshaft taper and the flywheel center with brake cleaner. They must be bone dry and oil-free. The taper is what actually holds the timing; the woodruff key is only there for alignment.

I see this asked a lot , yet its one of the most easy jobs to do , its just one nut , but you do need a special tool buy this tool on Ebay UK is only a way of applying force to the flywheel to pull it of the crank .some people locktite the flywheel nut and  flywheel on too, i have come across this many times and it is frustrating and can take a lot of force to remove , why they do this i do not know , i have had a few Cagiva Mito shred the woodruff key area and shear the woodruff key itself causing bad running through ignition timing moving , maybe this is why they load them up with loctite , i do not,  just fit a new wood ruff key if needed and torque nut to require specs

New Cagiva Mito 125 woodruff keys on Ebay UK here 

you will need this flywheel removal tool you can get them off ebay uk for about £20 you can buy cheaper universal ones as well.


i have both but prefer to use a specific tool for each bike i work on if possible .

Buy these Flywheels pullers from Ebay UK here 

first remove side cover , make sure this is fully intact , i have had a lot of Mito in and these were split or had large chunks out , lets water in (not good for electrics) and make sure you undo all of the covers bolts , do not snap one off like i usually see .

                            remove starter bendix and starter ring
                         r  

                                  undo flywheel nut at this point as well

 make sure cranks is locked into position to avoid movement and            damage while you apply pressure with you socket wrench.

set your puller up with correct bolts and make sure puller is set up                   as instructions suggest and its stable solid on the crank.

                                                   Buy this puller from Ebay UK here

it should pop off easy unless it has been Loctite into position in which case it might take a fair bit of force .

That is it , its a simple job if you have to go further and remove the stator make sure you mark the timing with a scribe or with white Tipex or similar so you can retime you engine easily on refitting

refitting , just do the reverse , make sure timing marks are not

 cleaned off and refit aligned , as long as woodruff key is fitted well

 and everything goes back ok its should be no problems whatsoever.

also a common one is fitting the flywheel without the woodruff key

 or it falls out 

just as you fit it , or a sheared woodruff key or woodruff key area 

which fails to lock flywheel in place .

See more cagiva mito 125 posts here 



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