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| does anyone have the port timings of the various 250 engines https://vintagedirtbikeforums.alp-sys.com/viewtopic.php?f=21&t=448 |
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| Author: | bp 1.8 [ Thu Dec 09, 2004 3:51 pm ] |
| Post subject: | does anyone have the port timings of the various 250 engines |
i can do some neat tricks with numbers if i had them. looking for espically the 73 mt 250 port timings. |
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| Author: | Dave [ Thu Dec 09, 2004 7:21 pm ] |
| Post subject: | |
I dont think anyone has those specs on the port timings but you can find out by attatching a degree wheel to the crankshaft and removing the head then rotate the crank and measuring how many degrees the intake,transfer,and exhaust ports are open in degrees and noting open and close of the ports and coming up with some close numbers.just a idea. |
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| Author: | bp 1.8 [ Fri Dec 10, 2004 8:59 pm ] |
| Post subject: | port timings. |
i would like to create a elsinore port timing database. the next time any of you open the top end up can you please record the intake, exhaust and transfer port timings and the port opening size? to get the size just use the hight x width. ill be opening my 73 mt 250 up in a week or 2. |
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