Basics Continued

Air cooler or liquid cooler are used too in motorcycle to stabilized power in long time used to control temperature in engine which power of engine can less after use in long time, because of than modern motorcycle have air cooler or liquid cooler. And oil is important part too, oil gives protection from rubbing in piston, you must choose the oil base on your motorcycle specification, because many type of oil, natural and synthetic oil base on ingredients. In oil case is must be written the oil indicator like 20-50, 15- 40, Which means a cold oil flows like a 20 grade but at high temperature it flows like a thicker 50 grade. But now natural oil not be used for now, because synthetic oil better than natural oil, every type motorcycle have different specification, like super sport motorcycle must use more great oil like 5-30 or 10-40 because super sport motorcycle have most power which piston work hard than another motorcycle so piston in super sport motorcycle must have more protection. And for 2stroke and 4stroke have different oil too. You must change oil periodic because oil has periodic life used, if you not change oil your bike would have not good performance, if your oil not good again, oil have mark if oil not good again color of oil is black. 

After we look engine, we go to another important thing is its chassis of motorcycle. Chassis is like frame. Motorcycle chassis usually made from iron and mixture from aluminum. But many company produce chassis innovation to find new material to be chassis, and then they combine with carbon fiber and titanium, which that make expensive than old material. Chassis in motorcycle like bone for human, if chassis do not have good strength maybe chassis can break and can cause accident. Chassis have many different types depending on motorcycle type, like chassis for trail bike, super sport bike, and city bike is different like trail bike have chassis with high ground clear, and super sport bike have lower ground clear and longer than trail bike, and for city bike have not more special specification just for conventional motorcycle to push the price, because city bike is use to daily activity. But in some case chassis can be bent because some crash and if you do not repair it motorcycle cannot be ridden well, because chassis is like the main structure.