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Grand Terrace, CA
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Paul_Pitzonka
8/31/2018 12:34am
8/31/2018 12:34am
Edited Date/Time
8/31/2018 9:20am
I have an engine that I came across when I picked up a bunch of parts from a guy on Craigslist and I’m just curious if anyone can identify what someone was trying to do with it... anyways it’s a 1986 yz 250 motor that, from what I can gather, has been stroked (haven’t measured rod length but, the cylinder has roughly a .340 thick spacer welded to it)... The head has been milled a ridiculous amount (I’m assuming to both raise compression and set squish)... the power valve arm has also been extended to account for the additional height of the cylinder...and then the cylinder has been ported a ridiculous amount on the intake side (doesn’t look like the greatest port work)... Auxiliary boost/boysen ports are huge! Transfer ports have been worked on a little bit same with exhaust and powervalve... If anyone has any insight that would be appreciated, just trying to make heads or tails out of what it is... thanks in advance
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