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Yes, very. If you build an engine from scratch with quality parts they last a very long time, I have a customer with over 54000km on his bike, naraku crank and bore kit, hoca seals and gaskets, hoca cam, naraku head, keihin 21mm carb and a uni filter. thing is a beast still.
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2012 Jonway X
44mm Hoca crank
52mm Hoca big bore
MMS big valve head raised ports, polished, milled .023
Hoca 26mm carb
NCY titanium valve springs
NOS wet nitrous system
Holley fuel pump
MMS variator
Naraku CDI
HT coil
4' Wheelie bar
MMG stainless slip-on exhaust
NGK "11" spark plug
UNI filter
2014 Icebear Maddog
too much to list
http://mmsscooters.com
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