Help wanted! Big bore kit for my Zongshen 250cc CB replica or XR250R engine?

Chineeske · 01-19-2019, 08:20 AM

Dear all,

I am thinking of upgrading my Orion 250cc bike as this aircooled Honda CB clone seriously lacks of power in the dirt...

I read somewhere on this forum that there are some bigbore (300cc) kits out there but not everyone is truly convinced about the power increase these things give.

I have a XR250R engine with loom laying around in my shed, but as a Honda 250R doens't have a battery, it would mean that my Orion bike would need a full strip and a lot of rewiring to keep it streetlegal in terms of lights and turnsignals.

My question is, if someone could me so kind to give me some advice;
Dropping the Honda XR250R engine in the Orion or would a bigbore kit with a nice carb also forfill my needs so I can keep the Orion wiring as it is? And where can I buy such a bigbore kit for my Zongshen engine as to me, all the Chinese cilinders looks equal....

01-19-2019, 08:20 AM	#1
Chineeske Join Date: May 2018 Posts: 29	Help wanted! Big bore kit for my Zongshen 250cc CB replica or XR250R engine? Dear all, I am thinking of upgrading my Orion 250cc bike as this aircooled Honda CB clone seriously lacks of power in the dirt... I read somewhere on this forum that there are some bigbore (300cc) kits out there but not everyone is truly convinced about the power increase these things give. I have a XR250R engine with loom laying around in my shed, but as a Honda 250R doens't have a battery, it would mean that my Orion bike would need a full strip and a lot of rewiring to keep it streetlegal in terms of lights and turnsignals. My question is, if someone could me so kind to give me some advice; Dropping the Honda XR250R engine in the Orion or would a bigbore kit with a nice carb also forfill my needs so I can keep the Orion wiring as it is? And where can I buy such a bigbore kit for my Zongshen engine as to me, all the Chinese cilinders looks equal....
	0