You can rebuild it and it would last a long time if the oil were changed on a scheduled maintenence interval . Also if the bike itself is in great shape that's all the more reason to save it !! Its cheaper to keep her if you do it yourself ..
Jason Siu has written: 'How to rebuild Honda B-series engines'
Find an actually rebuild kit for those carbs and its really just changing out the jets in the bowl and springs here and there, for the most part.
Going back far enough, S. Honda esq. took surplus WW2 generator engines and shoehorned them into pushbike frames (practical or what)
You will be fine with 10w-40 ATV or motorcycle oil designed for wet clutch engines.
Rebuilding an ATV top end takes some knowledge of engines. Check out my bio page for help.
I chose the brand of honda, it has a good performing vehicle, durable engines that serve you a lot of years. and some of the riders today use honda motorcycle because according to them this motorcyle much more practical and friendly users than the other brand.
10w-40 motorcycle or ATV oil designed for wet clutch engines.
Honda PE01E engine code - what model Honda motorcycle is this engine from?
I chose Honda motorcycle, this motorcycle has good performance and gives easy riding, some riders chose Honda because according to them this motorcycle is practical, has good efficient, low consumption of fuel and durable engine to serve long years of service. This motorcycle is friendly user, their spare parts are easy to get and has availability in the market unlike the other brand of motorcycle.
Honda makes all their own engines.
No you should use ATV or motorcycle engine oil designed for wet clutch engines.
Use some 10w-40 ATV or motorcycle oil designed for wet clutch engines.