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Disclaimer:

1.  Let me first start with the fact that I am NOT a mechanic.  I have been working on motorcycles and scooters for a long time and know a little about what I am doing.  I simply take pictures for other people to use as a guideline to help them modify their own motors.  Any modifications you perform are done completely at your own risk and liability.

2.  Tampering with your motor in any way may void your warranty.  Make sure this is a sacrifice you are willing to make before you begin working on your own vehicle.

3.  Before you begin, read this ENTIRE article from start to finish so you know exactly what is involved and what steps are required to properly complete the procedure.  Also make sure you have a nice clean area to work in.

4.  This example was performed on a 2006 Sachs MadAss 50cc automatic.

5.  ALL bolts and socket head cap screws are in metric! Don't try to work on your vehicle if you don't have metric tools, you will just wind up messing up the heads.

 
With the addition of a large bore motor, you really have to give consideration to adding an oil cooler.  Heat can be a serious problem for these larger bore motors, and there is no better way to cool them down than an oil cooler.
 
Depending on the style of motor you purchase, there is a few different styles of oil cooler hook ups.  Our Lifan 150 has 2 bolts on the kicker side of the cylinder.  One labeled with an arrow out and one with an arrow in.  The oil cooler kit we purchased from Fast Trails bolted right up.  We needed a little longer hose than was provided, so we went to the auto parts store and purchased some high pressure fuel injection hose.
 
Lets start by deciding where you are going to mount your oil radiator.  We found some tapped holes under the triple tree right next to the horn.  They were very close to being the distance apart we needed, so we decided to use them.
 
We had to do a little altering to the mounting holes to use the existing tapped holes.  A slight bending and drilling out made it fit perfectly.  We attached the radiator and it came out looking like this.
 
Next we attached our oil lines with hose clamps.
 
Next we removed the bolts on the motor, cut our hoses to length and attached them to the motor with the supplied fitting.  Once the hoses were attached to the motor, we zip tied the hoses up and out of the way from the motor for a nice clean look.

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