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General => General Discussion => Topic started by: JJJoseph on October 19, 2015, 07:44:10 AM

Title: Kymco Sento 50cc engine swap
Post by: JJJoseph on October 19, 2015, 07:44:10 AM

The variator on my 2010 Kymco Sento 50cc 4T exploded, puncturing the crankcase.  Kymco lists a  replacement crankcase at over $700, and a complete engine for $1500.  I took a chance and ordered a complete gy6 50cc Chinese engine from ScrappyDog scooter parts for $329. The engine came 2 days later by FedEx, and it fit my Kymco perfectly.  The gy6 came with a generic stator which I swapped for the Kymco stator & flywheel, and it fired up no problem. 

Title: Re: Kymco Sento 50cc engine swap
Post by: TroutBum on October 19, 2015, 04:45:52 PM

Plug and play. You gotta love that.

Title: Re: Kymco Sento 50cc engine swap
Post by: MassScoot on October 19, 2015, 04:54:27 PM

Nice story & great savings!

Title: Re: Kymco Sento 50cc engine swap
Post by: Abner_Bjorn on October 21, 2015, 12:09:31 AM

Could you please post  a couple of pictures of the swap?   I'd love to see it.

Title: Re: Kymco Sento 50cc engine swap
Post by: blue on October 22, 2015, 01:39:37 AM

Been there done that my swap was a wildfire motor on my agilty 50.and also had to swap the stator.road the bike for 3 years after the swap. then sold the scoot for 500.00 So I did good.  In joy the new motor im sure it will be funn.

Title: Re: Kymco Sento 50cc engine swap
Post by: JJJoseph on November 23, 2015, 05:09:38 AM

Quote from: wallboard on October 21, 2015, 12:09:31 AM

Could you please post  a couple of pictures of the swap?   I'd love to see it.

Actually it looks just the same as the old one, except it doesn't say "KYMCO" on the left side.  It also has a "QMB139" serial number now instead of the Kymco "SD10E" serial number.  I've attached a photo of the crankcase behind the variator after the variator exploded.  You can see the gash in the crankcase around the crankshaft.