Cagiva Mito 125 Owners Blog : Cagiva Mito 125 Carb cleaning / Carb set up / Jetting / Idle set up

Cagiva mito 125 for sale here on Ebay UK

Cagiva mito 125 parts for sale here on Ebay UK

The carburetor is the heart of your Cagiva Mito 125. If your bike is bogging down, surging, or failing to idle, a dirty carb is the most likely culprit. Stripping and cleaning a two-stroke carb is simpler than a game of Meccano—don't let it intimidate you. Mastering this task will save you hundreds in shop labor.

Signs Your Carb Needs Cleaning:

Water Contamination: If you see "grey residue" on your spark plug, you likely have water in the float bowl. Since petrol floats on water, your engine is literally trying to breathe a lungful of water instead of fuel.
Clogged Jets: Dust, rust, or old fuel "gum" can block the tiny holes in your brass jets, causing lean running and potential engine seizure.

Step-by-Step Cleaning:

Remove the Carb: Flip the tank, turn the fuel tap OFF, and loosen the two jubilee clips. Wiggle the carb out from the intake rubbers.
Drain & Inspect: Hold the carb upright and remove the large brass bolt at the bottom. Drain the fuel into a glass jar. Look for "globules" (water) or dirt at the bottom.
Clean the Jets: Remove the brass jets one by one. Rinse them in boiling water or carb cleaner and blow through them. Never poke them with wire, as this can enlarge the hole and ruin your jetting.
Reassemble: Snug the jets back in (do not overtighten) and replace the float bowl.

Standard Dellorto PHBH 28 BD Settings:

Main Jet: 110 (Restricted) / 120 (Full Power)
Starter Jet: 65
Idle Mixture Screw: 1 to 1.5 turns out from fully closed.

How to Set Your Idle:

With a warm engine, turn the Idle Screw (center) until the bike revs at 2,000 RPM.
Twiddle the Air/Mixture Screw (to the left of the idle screw). Turn it in, then slowly out (usually 1.5 to 2.5 turns) until the revs reach their highest, smoothest point.
Turn the Idle Screw back down until the bike settles at a steady 1,200–1,500 RPM.

Cagiva Mito index page see more posts on engine rebuild , tuning

etc )

Cagiva Mito 125 Dellorto 28mm for sale now on

Ebay uk click here

cagiva mito 125 throttle cable adjustment

Mikuni carb tm35mm

Rare to find the 35 tm's now try on ebay uk here

Free Carb Manuals

dellorto carb manual

mikuni carb manual

Download the manual, read it. Stripping and cleaning carb is one of the easiest jobs to do on a 2stroke bike.

Meccano is harder to get to grips with than stripping and cleaning a carb. Don't let it scare you - it really is easy to do... otherwise, I'd suggest selling the bike and getting a 4T, as any regular maintenance that is a necessity for a 2stroke bike is gonna scare you, and you're gonna end up forking out hundreds in labour hours to the local bike shop for tasks that really you should learn to do yourself.

Grey residue is likely result of water mixed with 2T oil saturating / flooding your spark plug as you have water in the float chamber that is submerging the main jet (main jet is in base of float bowl, and petrol floats on water), so when you open throttle, bike gets a lung full of water rather than fuel.

Flip up tank. Turn fuel off. Look down at carb. Either side of it you'll see 2x jubilee clips clamped over rubbers. Undo those. Grab carb... move it backwards and forwards and work it out from between the rubbers. Keeping it the right way up, undo big brass bolt in bottom. Bottom will then come off. This bottom part is the float bowl. Ideally, open the bolt over a glass bowl so that you catch the spilt fuel and can inspect it for signs of water or contamination.

If no signs of globules of liquid suspended in fuel, inspect the bottom of the carb that you removed for signs of contamination - dust, rust, dirt etc. Rinse it out.

The jets are small brass things with a hole in the middle and a flat-blade screwdriver cut - you'll see em. Take them out one at a time, blow thru them, rinse in boiling water. Put em back in again. Tighten em til they nip gently.

Put float bowl back on. Do up the big bolt to secure it in place. (Note, this big bolt has the main jet fitted in the opposite end of it).

Fit carb back in between the rubbers. Put the jubilee clips back on. Turn on fuel tap.

See if it starts. See if problem still exists.

Cagiva Mito Evo Carb Tuning Kit click here to read more about this on Ebay UK.

CARB SETUP

Set it to rev at 2000 with the idle screw, then twiddle the air screw just to the left of the idle screw... turn it all the way in, then back out 1.5 to 2.5 turns, listening to engine. As you turn it, revs should increase slightly. Set it to a point that revs are at highest and smoothest. Now use the idle screw to tune it back down to around 1100rpm ( i normally set mine at 1500rpm )... that should be the carb as set as it can be.

in = increase

out = decrease revs

Cagiva mito carb

Cagiva mito carb jets

-----------------------------------------------------------------------------------

Type ....................... Dell'Orto PHBH 28 BD
Venturi Diameter ..............................mm 28
High Speed Jet . .................................. 100
Starter Jet . ............................................ 65
Low Speed Jet . ..................................... 55
Emulsifier ............................................... 55
Throttle Piston ............................... 44.59.00
Metering Pin . ........................................ X 4
Metering Pin position . ........................... 3rd
Main Nozzle . ................................. 270 BN
Float .................................................. g 9,5
Idle Mixture Adjusting Screw . ...... 1 and 1/2

Type ....................... Dell'Orto PHBH 28 BD
Venturi Diameter ..............................mm 28
High Speed Jet . .................................. 110
Starter Jet . ............................................ 65
Low Speed Jet . ..................................... 65
Emulsifier ............................................... B65
Throttle Piston ......................................... .45
Metering Pin . ........................................ X 4
Metering Pin position . ........................... 3rd
Main Nozzle . ................................. 270 BN
Float .................................................. g 9,5
Idle Mixture Adjusting Screw . .......... 1

Type ....................... Dell'Orto PHBH 28 BD (A-CH)
Venturi Diameter ..............................mm 28
High Speed Jet . .................................. 120
Starter Jet . ............................................ 65
Low Speed Jet . ..................................... 38
Power Jet............................................... 90
Low Emulsifier.......................................BF 1
Throttle Piston ...................................... .50
Metering Pin . ........................................ X 58
Metering Pin slot . ................................. 1st
Main Nozzle . ................................. 266 DU1
Float .................................................. g 9,5
Idle Mixture Adjusting Screw (turns). ...... 1/2

REGULATION OF IDLE
This regulation must always be
carried out with warm engine
and throttle closed.
Operate as follows:
- remove the right or left-side
fairing according to
instructions on page 14;
- tighten adjusting screw (1) of
the fuel valve to obtain a high
speed rate (2,000 RPM; by
turning clockwise, the speed
increases, by reversing the
operation it decreases);
- tighten or loosen screw (2)
that adjusts mixture dosage
until getting regular engine
rotation;
- progressively loosen gas
valve adjusting screw (1) until
reaching 1,000 RPM.
- reassemble the side fairing.
At high speed fuel mixture
dosage is automatic, and
cannot be opened from the
outside. Should the engine run
irregularly, clean the carburetor.

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TM35mm carb Cagiva mito

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mito evo racing '95 original settings mikuni tm35:

throttle slide 5.5
jet-needle 6AEL4-60, 4th clip from below, 2th from top
pilot jet 45
main jet 310
air screw 1.5 turns from closed

mikuni tm35-1 'aftermarket' setting:

throttle slide 6.0
jet-needle 6EN11-53, 3th clip
pilot jet 20
main jet 350

Cagiva mito 125 carb strip down videos ?