RadarRacing Posted February 20, 2014 Report Posted February 20, 2014 One or more pistons put in with the windows facing the exhaust , not the intake? They will start and not rev and spit like hell out the pipes. 1 Quote
Strm Trpr Posted February 20, 2014 Report Posted February 20, 2014 Yes, the piston windows must face the intake... Quote
chrispy56 Posted February 20, 2014 Author Report Posted February 20, 2014 And the arrow on the top of the pistons point forward/toward exhaust Quote
chrispy56 Posted February 20, 2014 Author Report Posted February 20, 2014 That's maybe a tad high on the squish but doesn't explain your low PSI. Did you kick it over at WOT until the gauge stopped moving? What was the ring end gap? Was it bored at a machine shop that had the pistons on hand to measure? Was it honed? Double checked end gap and they all fall between.017" and .019" Quote
chrispy56 Posted February 21, 2014 Author Report Posted February 21, 2014 Does the condition of these pistons indicate anything to you guys? I have never seen this before. Quote
sheerider11 Posted February 21, 2014 Report Posted February 21, 2014 Yeah the right side isn't firing or may have a coolant leak. That "design" is known as piston wash. You can see the design of the ports and. How the fresh air fuel charge washes away carbon. Now with the right side, you can see there's no carbon. Coolant is very good piston cleaner. As well as un-burnt fuel. I can't make out what's on the back of the left piston. But your defiantly not firing on the right side for one reason or another. Quote
sheerider11 Posted February 21, 2014 Report Posted February 21, 2014 How many hours has it been ran? Quote
chrispy56 Posted February 21, 2014 Author Report Posted February 21, 2014 Probably 1-2 hrs total. Just while diagnosing this problem, since assembly. Quote
sheerider11 Posted February 21, 2014 Report Posted February 21, 2014 Oh wtf. Then your left side is lean as well. I thought this had more then a few hours. Quote
camatv Posted February 21, 2014 Report Posted February 21, 2014 you got some gremlins.. very strage to have that low of comp even on a non broke in motor. thats probably why the cyl is not firing very weak comp but usually on a 60 lbs motor kicking they wont start without a pull. anything less than 100 and they get hard to start. Quote
chrispy56 Posted February 28, 2014 Author Report Posted February 28, 2014 Reassembled cylinders and head. Borrowed a different compression gauge. Compression reads 135 in each cylinder. Quote
chrispy56 Posted March 9, 2014 Author Report Posted March 9, 2014 replaced nology coil with oem coil...same problem replaced oem cdi with known good oem cdi...same problem replaced racetech stator with oem stator...same problem Quote
chrispy56 Posted March 11, 2014 Author Report Posted March 11, 2014 Rechecked the flywheel. No rattle or any sound of loose parts within...can a flywheel still be bad if it passes "the shake test"? Quote
gomerkfx700 Posted March 18, 2014 Report Posted March 18, 2014 Mine is doing just exactly what yours is it will take off to just about when you think ur should come on the pope and it acts like it hits a rev limiter hope fully the weather is nice today so I can try a few things to it. Quote
kennygene Posted March 18, 2014 Report Posted March 18, 2014 Maybe you have a fuel issue? Do you have any other carbs you could throw on it? Quote
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