Some data on j-engine compression

sam2019

sam2019

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This is my Meteor with 20k km on the engine but a new 500cc cylinder and stock head

200psi
 

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  • 500 meteorf546e46.mp4
    2.8 MB
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This is a new classic with 20k km but a pretty low battery

170 psi
 

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  • new classic 20k 2b68e.mp4
    2.3 MB
This is a Meteor with 8k km and a pretty good battery

155 psi
 

Attachments

  • meteor 8k f6.mp4
    2 MB
Based on this I think to get rid of the occasional knocking during acceleration from low rpm caused by the lousy fuel we have here I need to widen the head a bit with a dremel. It is now in stock configuration, 78mm - I will widen it to fit the cylinder to 84mm.
The only other option is to add one or two base gaskets but I think the head mod is the cleaner option.

In the west with "super" 100 RON gasoline (Shell V-Power, Aral Ultimate) available that should not be necessary.
 
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Solution is here:

500cc J-engine compression reduction

To reduce the compression all we needed to do was take off a part of the head that made it smaller in the 350 stock configuration. This was done with a dremel and including washing the head it took under 40 minutes. I then decided because we had the head out and the engine has 20k km on it to...
forum.himalayan-tools.com forum.himalayan-tools.com
 
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