Overboss

What & How overboss effect

Over boss / replace liner / replace the boring is the replacement liner in cylinder block with a specific purpose, there are some things that the background for people to do Over bosses include:1 Want to add capacity machineThis is done because the owners want to change the size of the motor piston to the maximum size so that the required liner material that is thicker than the original liner.

2 After the over-sizeThis is done usually because the engine had started noisy or because the cylinder is scratched so that the machine should be oversized while the size of the piston is no longer on the market, then to overcome the old liner must be removed and replaced new

3 Damage to the cylinder not BerlinerIn today's motor2 apply many technologies without cylinder liner with an explanation from the manufacturer that the cylinders without liners with metal plating technology will make life more durable than the cylinder cylinder Berliner, because they claim the metal coating on the cylinder material has a friction resistance and resilience that expansion higher than the cylinder Berliner, if indeed it is achieved then it should be in normal use motorcycle owners will benefit a longer life time .. it's just that there are some motorcycle owners who improve the performance of the engine with modifications, this requires the mechanical precision, one Just a little cylinder liner can be damaged without fault of the engine by mechanical setting not only produce high friction but also usually occurs baretan by other material that caused the cylinder is broken. Other materials may be of material piston / piston ring is melted because of detonation.

PLEASE NOTE THAT ANY TIME OVER BOSS
Over boss has to do with ketentuan2 as follows:

A liner material must have mechanical characteristics such as previous materials including frictional resistance and resilience of expansion which at least equal to the original cylinder liner manufacturer.

2 Point center of the new liner should match exactly with the center on the original cylinder.Sometimes the workshop lathe do kolter without specifying exactly center on the cylinder block before, this should be avoided for the sake of shelf life cylinder blocks and other components related by center block that does not fit will result in compression force from the piston to the other components which come into contact with it are not distributed evenly, this resulted in severe kerusakan2 komponen2 tsb.

3 Especially in liner 2 stroke, do-it-turner must understand exactly about the standardization ported on the cylinder 2 stroke, both types of ported Horizontal roof roof angeled transfer ports or port transfer. if ported liner wrong then:

- Power & torque produced a weak

- Shot of fuel oil into the side of the cylinder chamber is uneven so that lubrication in the cylinder wall becomes imperfect, this resulted in poor performance & block machines become easily scratched.