Honda 13hp gx390 engine is 389cc but honda have change a lot of rated hp of late for example the gx270 was sold as a 9hp engine but now being sold as a 8.5hp and the gx390 is now sold as 11.7hp i sell engine in my store over in the Philippines i have a loncin 13hp there which is 375cc and a 14hp which is 414cc
The engine displacement is 450 cc's.
500cc
Engine horse power depends on many factors except engine size (cc). For example Honda XR650L 650cc produce 32Hp and Honda CBR600rr600cc produce 130Hp.
Honda gets about 11HP out of their OPE engine.
For Bajaj bike ,bajaj DTS-i is the best in class,but Honda,or hero honda's bike then you can use Gulf pride 4t (20w40) and Mak 4t also good.
Honda engine
It is 49-cc
1500 cc
This will depend on the engine type, manufacturer, weather and altitude. A Honda GCV160 for example produces 4.4hp at 3600rpm.
80 cc.
No, you can't. Because the two engines are not of the same size. The 250 cc engine is bigger than the 125 cc engine, so things will not fit between them.
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