Post by jstluise on Aug 4, 2012 2:08:56 GMT -6
I am currently in the middle of the 11 pole upgrade for my 2009 Kymco Agility 125 (GY6). Slowly but surely I have been making progress with help from John (tvnacman) and others over at Scooter Doc. I purchased the parts from John, who has also sold the same parts to other riders for successful 11 pole upgrades on their scoots.
There was question of whether or not the new flywheel I bought would cause ignition timing issue or not since the location of the trigger magnet (in relation to the key way on the flywheel) was different between the two. Here is a picture showing the Kycmo flywheel (left) and the replacement (right):
As you can see, the location of the trigger magnets are very different. We suspect that there will be timing issues since the CDI relies on the trigger to know the rotation of the engine; changing the location of the magnet will obviously change when the trigger signal is sent to the CDI. The trigger should occur when the engine is at TDC, and this will not be the case with the new flywheel.
Another issue was whether or not the old flywheel would work with the new 11 pole stator. Both flywheels contain 8 magnets (see video below), and after measuring, the inner diameter of the flywheels are the same. Given that, we don't foresee a problem with using the original Kymco flywheel in the upgrade, even though everywhere you read online states that an 8 pole flywheel is different than 11 pole flywheel. Also, the Kymco flywheel has stronger magnets, which will result in better performance.
Just wanted to get this out there for everyone to see. I'm not sure why the new flywheel is different...the Kymco is either a different breed (though I thought all GY6s were mostly the same), or there was a manufacturing mistake with the flywheel.
I would love to hear (as I'm sure John would too) any thoughts regarding this issue. I'm making progress on the upgrade, though just found out I need to get a AC CDI since Kymco uses DC CDIs, so that has slowed my progress.
Here is the video showing the two different flywheels and their magnets (I show the Kymco first, then the replacement):
There was question of whether or not the new flywheel I bought would cause ignition timing issue or not since the location of the trigger magnet (in relation to the key way on the flywheel) was different between the two. Here is a picture showing the Kycmo flywheel (left) and the replacement (right):
As you can see, the location of the trigger magnets are very different. We suspect that there will be timing issues since the CDI relies on the trigger to know the rotation of the engine; changing the location of the magnet will obviously change when the trigger signal is sent to the CDI. The trigger should occur when the engine is at TDC, and this will not be the case with the new flywheel.
Another issue was whether or not the old flywheel would work with the new 11 pole stator. Both flywheels contain 8 magnets (see video below), and after measuring, the inner diameter of the flywheels are the same. Given that, we don't foresee a problem with using the original Kymco flywheel in the upgrade, even though everywhere you read online states that an 8 pole flywheel is different than 11 pole flywheel. Also, the Kymco flywheel has stronger magnets, which will result in better performance.
Just wanted to get this out there for everyone to see. I'm not sure why the new flywheel is different...the Kymco is either a different breed (though I thought all GY6s were mostly the same), or there was a manufacturing mistake with the flywheel.
I would love to hear (as I'm sure John would too) any thoughts regarding this issue. I'm making progress on the upgrade, though just found out I need to get a AC CDI since Kymco uses DC CDIs, so that has slowed my progress.
Here is the video showing the two different flywheels and their magnets (I show the Kymco first, then the replacement):