With the LONCIN (duno if its same as lifan) you wont be able to bore it unless you drop a stud or rearrange the studing. You will notice the 5mm steel sleeve insert. You could take a few mm off that. You would normally get it resleeved, but there is not enough room because of the close stud pattern. Duno the setup of the lifan, but if theres room you should be able to get it resleeved, bit pricier than opening up a solid steel barrel.