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Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc. |
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#1
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Top End Clearances/Specs
Need some quick answers, can't find them anywhere. What are the tolerances for piston/bore clearance? I've heard 0.06mm, but need max/min numbers.
Thanks, Steve |
#2
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one and a half thou of a inch min, max is up to you but I dont like to run more than .003 inch, two stroke sleds are known to run seven thou on fresh cast pistons.
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#3
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Good info on this link (go to the long post) :
http://www.thumpertalk.com/forum/arc.../t-430827.html I have the official GasGas numbers somewhere I'll see if I can find them. - Ken |
#4
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This is from the GasGas 2006 shop manual:
Clearance between piston and cylinder: 200 std:0.05mm , limit: 0.10mm 250 std:0.055mm , limit: 0.10mm 300 std:0.06mm , limit: 0.10mm Ring Gap: 200 std:0.3mm , limit: 0.6mm 250 std:0.4mm , limit: 0.7mm 300 std:0.5mm , limit: 0.8mm Cylinder Bore: 200 std:62.50mm , limit: 62.60mm 250 std:66.38mm , limit: 66.50mm 300 std:71.99mm , limit: 72.10mm |
#5
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Also depends somewhat on what piston were talking about. I'm assuming the now OEM Vertex.
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