Stroke Up

ilustrasi stroke up

Stroke is the process of adding up the machine capacity by adding the pistons move. In general, the big end position is shifted more towards the outside, so that the up and down motion of the piston from TDC to BDC increased considerably. A lot of people the wrong perception, replace piston handlebar longer it will raise stroke. whereas, simply replace the handlebar piston (con rod) with handlebar longer stroke will not change during the big shaft end unchanged.
There are several alternatives in the election process up stroke, among others:
1 Lathe crankshaft outwards
The first way is to shift the big end outwards. Her way is to cover the big hole with the long end weld and make coakan new big end. The difficulty is to equalize the left and right holes of each leaf crankshaft. If deviated only slightly, the engine vibration will be felt and even much engine power is wasted. This method requires very outstanding craftsmanship.

modified crutch

2 Pen stroke
Pen in the form of standard big end straight cylinder, while the pen strokes have a change in its middle. It is able to shift the position of the big end as crutches without changing the position of the big end hole. It's just the price varies from 300 thousand to 700 thousand. Installation means only a pen change its course. If the pen stroke is more than 5 mm, then it takes the ball bearing type split bamboo.

pen stroke up

3 Swap crutch
Kruk.as replace with another motorcycle crankshaft stroke is larger standards. It allows stroke up securely. But the main problem that arises is:

     Crankshaft rod stuck in the oil pump (on the C-series Honda engine)
     Gear gearbox increasingly vulnerable in contact with crutch
     Differences in leaf diameter crankshaft
     Differences arm crutch
     The price is much more expensive

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  as crutches another motor