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The first component that we decided to put on a diet was the piston. We had been using an off-the-shelf piston that we were able to modify to fit the 750 kit but this gave us a few problems. The piston was heavier than we wanted it to be, the compression height meant that we had to run a packer and it could only be used with our JBS Racing conrod and crank.

We decided at the design stage for the new piston that we would make it compatible with the OEM Husaberg piston. So the JBS Racing 105mm piston is now exactly the same as the 2006 OEM Husaberg “650” 100mm piston except for the bore size. It is the same weight, compression height, valve pocket depths and angle are the same etc.

This provides us with a light piston that can be used in the 750 and our newer experimental engines and is compatible with the OEM crank-shaft and conrod allowing us to make a “700” kit using an OEM crank if the customer does not want to run an 86.0mm stroke.

We also had 108mm piston made at the same time, again these are fully compatible with the OEM piston only the bore is different. This allows us to make the following configurations –

This entry was posted on Wednesday, April 30th, 2008 at 10:10 pm and is filed under Engine Develoment. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.