TRX250R.ORG
Workshop => Engine and Bottom End => Topic started by: muthahucker on May 06, 2014, 11:11:57 PM
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Im looking to get a spacer plate to use with my 86 bottom end and piston, 86 jug and an 89 long rod crank. Looking at the ESR website they list 2 different kits at the .190 thickness for the 86 piston and 89 crank rod.. First is 72-73.5 mm bore .190 thick.. other says 76-80.5 mm bore .190 thick..
Anyone know which one I should get, im not sure why there are 2 different kits. I left a message with ESR last week to get an answer but no one has called back
Thanks
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Im looking to get a spacer plate to use with my 86 bottom end and piston, 86 jug and an 89 long rod crank. Looking at the ESR website they list 2 different kits at the .190 thickness for the 86 piston and 89 crank rod.. First is 72-73.5 mm bore .190 thick.. other says 76-80.5 mm bore .190 thick..
Anyone know which one I should get, im not sure why there are 2 different kits. I left a message with ESR last week to get an answer but no one has called back
Thanks
One spacer plate has a hole sized for the 250 sized sleeve the other has a larger sized hole for the big bore sleeves. If you had a real good combination (you had your port timings and piston to head clearance right where it needed to be on your old set up with a short rod crank) you need one .5mm thick base gasket and one .25mm base gasket with the .190 spacer plate.
The difference in rod lengths is 5mm or .197". What some shops call a .190 spacer plate is usually made from 3/16 (.1875 ") thick material. The 3/16 material is usually zero to .003" thinner that what it is suppose to be. Most .190" plates measure about .185" to .188" thick.
So..........what does all of these numbers mean?
You need a spacer plate and one of the gaskets (compressed thickness) to have a total combined thickness of .197" with the other gasket to have the same compressed thickness as the OEM gasket.
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Thanks for the info.. Know which one I need now