whats needed to derestrict like 50cc 4t

[drewbo]

Hi guys, hows it going i'm new to the forum.

Bought a Kymco like 50cc 4t out here in Australia a few months back and its running well.

Looking to derestrict it and there is a few differing opinions online. Just wondering if anyone has done it on this 4t model and if so what do i need.

Thanks in advance

Drew

[245luigi]

What speed are you hitting??

[drewbo]

Just hitting 50kmph, if its a big hill im hitting 55. 

Could just do with an extra bit of zip to stop the traffic tailing up behind me.

[JJJoseph]

Looking to derestrict it and there is a few differing opinions online. Just wondering if anyone has done it on this 4t model and if so what do i need.

The stock Kymco Sento 50cc CDI restricts max rpm, but can't be swapped with an unrestricted Chinese CDI like most other 50c scooters.  I found an unrestricted CDI for Kymco Sento 50cc at Scooter Assassins.  It adds about 8kph, so it's useful, but it's a bit expensive.  Not sure if this will work with the Kymco Like, but they'll answer your questions.

[245luigi]

The 2 stroke has a derestricted CDI stock. Try emailing kymco and inquire as to if there is a rpm restrictor on the 4t.

Open the CVT and see if there is a washer on the variator slide. Thats where the restriction is on the 2t.

[JJJoseph]

The 2 stroke has a derestricted CDI stock. Try emailing kymco and inquire as to if there is a rpm restrictor on the 4t.

Open the CVT and see if there is a washer on the variator slide. Thats where the restriction is on the 2t.

He's got a 4T not a 2T.  The 4T is severely restricted and it doesn't use a "washer" in the variator, it uses a restricted bushing that is usually replaced by the dealer with an unrestricted bushing at delivery time in unrestricted regions.  In addition, the 4T has a restricted CDI which I described above.  It's not helpful to be guessing at answers if you don't really know.

[drewbo]

Thanks for the input guys, i'll ping Kymco an email and see what they say!

[drewbo]

Got a reply back from a company called monster scooter parts-

Hello,

Thank you for contacting Monster Scooter Parts.

We have not been able to verify if this part is compatiable with your scooter.  This is a part for a 50CC Kymco scooter though. 

If you have any questions or if you need further assistance please let me know.

Thank you,

Michelle R.
Monster Scooter Parts
800-798-0325 ext. 118
www.monsterscooterparts.com



Still no further forward.

[drewbo]

JJJoseph what year is your scooter? If they are similar i would imagine the CDI's would be the same?? Mines is 2012.

[JJJoseph]

My Kymco is a 2009 (qmb139 engine with carburetor).  If yours is fuel injected, it's different; carbureted is the same. 

I said above that I got my unrestricted CDI from Scooter Assassins, not Monster Scooter.  The one from Monster is different so I can't confirm that it works.  I'm not saying it doesn't work, only that I don't know.

The CDI I bought from Scooter Assassins is confirmed for a Kymco 4T, and it works.

[Glennza]

Might want to check and see if there is a collet inserted into the airbox intake too. If so, take it out!
My Like 50 4T had it.

[drewbo]

Glennza what exactly did you do then to get in derestricted?

Same as what the guys have said plus take the collet out?

[JJJoseph]

take the collet out?

When you take it out, it will run lean and stumble on acceleration.  You'll then need to up-jet one or two sizes.

[LoveMyKymco]

If you have the 2 plug style cdi there are many options, if you have the single plug style you are limited. Most sentos use the single style and Naraku and a few better higher end companies make cdis for them but you will have to find them on webike.com.
Naraku is junk electronics parts so I wouldnt even waste my time with them. Pure junk. I would never put anything Naraku on my bike especially electronics. Its like putting an autozone alternator on a Benz, or any other car for that matter.

[JJJoseph]

If you have the 2 plug style cdi there are many options

Here are some CDIs that work on a 2008-2009 Kymco 50cc 4-stroke: