Well, all I can add from personal experience is that I have honed dozens of cylinders with a fast in and out but a slow revolution on the lubricated ball hone. Ends up from 30degrees to 45degrees. It never takes off .002, maybe in a Sunnen honing machine but not by the method that has served me well for 25 years. One crucial step which may have been mentioned, is to completely clean all cylinders bored or honed in warm soapy water to remove any hidden traces of fine metal after a hone,bore or contamination. Dry it fast and some light oil will prevent the "flash rust".
FACT, I have rebuilt too many motors to recall and they never blew up; Not 1 motor I built blew up!!, so I'm doing something right. Then the 4 strokes came along with the shims on top of the valves and I started rebuilding those as well. My friend said it best, "every motor you build me starts on the 1st kick!!" made me feel good
Gotta take pride in your work.
I also like to chase all threads with a tap, making sure 1.5X the diameter is the length needed for optimum thread strength. For example, those 6x1.0 pitch case bolts need to be 9mm thread length, more is not necessary. I learned this when working with a toolmaker as well as owning my own machine shop.
Check ALL gasket or honda-bond mating surfaces with a fine stone such as a toolmakers stone with WD40 and watch the high spots disappear!! Remove the dowel pins and clean them, then lightly oil them and reinstall them for an easy re-assembly. These issues you may find are from prior owners that smashed mating surfaces apart, and back together. Most motors have a casting "boss" for a brass drift and light
to avoid damage to the surfaces.
I also apply grease to my clutch cover, stator side cover gaskets and some others and don't have leaks; The gasket can be re-used. New gaskets crushed for the first time are nice, however, my method has not failed me in a situation when a clutch is lost and you don't have the gasket. Of course it is not a practice to be done on base or cylinder head gaskets. If you had a 2 stroke, I would recommend using a pointy punch on the base mount with about 5 dimples on each thin side as sometimes those can be "suked" in the crank (seen it), but we have a 4 stroke here so I shall continue.
You are more than welcome to bring that machine down and we can cover more than you have read as why it is done a certain way. Fully heated shop with any tool you could possibly need. It's nice when you understand why the cam spins more times than the crank and WHY! TDC, timing, 180 out and other discussions can be educating. I would not charge you one dime as I enjoy your company.
It's also time to yank the clutch cover and clean the "oil filter rotor" which is a centrifugal type of oil filter rather than a paper oil filter element such as on your 86/87 250SX. Look at the damage to that top end, that damage all goes in the oil filter rotor and some out the left side steel mesh filter.
We can also discuss your kickstarter gears if a shim for the engagement of the gears or back cutting them has been done with good results. Especially when you replace the top end with a greater compression piston than OEM. This area has been a demon of 83/84 and 85 200X's. The 86/87 200X solved that issue.
Last edited by Dirtcrasher; 02-19-2014 at 07:55 PM.
Reason: spelling
All our government does is distract us while they steal from us, misspend our tax $ and ruin our country