EC200 Cylinder Measurements
- Thread starter WTEC
- Start date
i doubt it would be the cases.
i'd rather think it's the con-rod that's too short...
it does make sense that ,when your piston is at BDC it sits under the exhaust port, and none of our stock gassers have that.
and when your piston is at TDC it allso sits about 3-4mm under the cilinderhead.
you could end up with the piston under the exhaust port if you had it stroked but then allso the piston would come out of the cilinder on TDC.
so to me it really looks like someone missed on the con-rod...
i guess you could allso measure from the outside if your cases were to high.
if they would be like 3-4mm too high, you'd definately notice that...
if i find the time i'll try to find a way to measure that from the outside.
ciao,Hannes.
i'd rather think it's the con-rod that's too short...
it does make sense that ,when your piston is at BDC it sits under the exhaust port, and none of our stock gassers have that.
and when your piston is at TDC it allso sits about 3-4mm under the cilinderhead.
you could end up with the piston under the exhaust port if you had it stroked but then allso the piston would come out of the cilinder on TDC.
so to me it really looks like someone missed on the con-rod...
i guess you could allso measure from the outside if your cases were to high.
if they would be like 3-4mm too high, you'd definately notice that...
if i find the time i'll try to find a way to measure that from the outside.
ciao,Hannes.
WTEC
New member
OK, got a few more numbers here:
1. Base gasket surface to crank center line is 3.8705" (98.31mm)
2. Base gasket surface to connecting rod small end center line is 2.340" (59.44mm)
3. Calculated rod length center to center is 4.9305" (125.23mm)
Jakobi, if you could give me the rod measurement I can rule that out.
Zman, if you can give me the diameter of the bearing bore I can compare the base gasket height off crank center line.
Really appreciate all the help with this guys.
Wes.
1. Base gasket surface to crank center line is 3.8705" (98.31mm)
2. Base gasket surface to connecting rod small end center line is 2.340" (59.44mm)
3. Calculated rod length center to center is 4.9305" (125.23mm)
Jakobi, if you could give me the rod measurement I can rule that out.
Zman, if you can give me the diameter of the bearing bore I can compare the base gasket height off crank center line.
Really appreciate all the help with this guys.
Wes.
WTEC
New member
Well, there's the problem. Probably worst case scenario (pun intended), the crank center to base gasket measurement is out 1.96mm from Zman's. This explains the 4mm squish when it is usually around 2mm on the Gassers, and why the piston is 1-2mm below the exhaust port at BDC. Thanks for all the help guys, this will hopefully give me the facts I needed to get this sorted out through warranty.
Wes.
Wes.
nambo-trev
New member
Well im glad its hopefully getting worked out because I've been down my main riding buddy for wayyy to long now!
WTEC
New member
Thanks Clay, please keep me posted.
Thanks for double checking Zman, that actually makes it about 1/4mm worse, either way it's out to lunch.
Wes.
Zman
Platinum Level Site Supporter
I compared your photo of your case to mine and they appear to be different and collaborate your findings from the measurements. Your cases look taller based upon the distance between the top of the intake port and the top deck surface of your cases. The photo shows your case but calls out my measurement. From your photo, it appears that your cases are close to 0.1" taller than mine based upon the thickness of the case above the intake port.
