|
|
Post by oldgeek on Sept 14, 2015 20:11:12 GMT -5
Since I am waiting for the piston kit to arrive from Taiwan, I decided to hone the cylinder with my brand new ball hone. So how does it look?  |
|
|
|
Post by 90GTVert on Sept 14, 2015 20:33:59 GMT -5
|
|
|
|
Post by oldgeek on Sept 22, 2015 6:20:28 GMT -5
Replacement piston kit is here, I am about to get this thing running again.
|
|
|
|
Post by oldgeek on Sept 22, 2015 20:33:16 GMT -5
Piston to cylinder clearance:
.002 feeler gauge pulls out easily
.003 feeler gauge piston wont go into the bore.
Ring end gap:
1 ring = .25
1 ring = .29
Which position should the tighter ring be used in?
|
|
|
|
Post by Corrosion on Sept 22, 2015 20:47:19 GMT -5
I would put the tightest on top.
|
|
|
|
Post by Lucass2T on Sept 23, 2015 0:44:19 GMT -5
Im sorry if I understatement wrong but are you measuring piston clearance with a feeler gauge???
|
|
|
|
Post by iwiketuddlz on Sept 23, 2015 4:02:01 GMT -5
Man that crosshatch looks great!!! Nice job!!
|
|
|
|
Post by oldgeek on Sept 23, 2015 6:15:54 GMT -5
Im sorry if I understatement wrong but are you measuring piston clearance with a feeler gauge??? Yes, feeler gauges. Here is an older video from the first time I tried doing it. Some wise, old school guys around here taught me how to do it.  If you don't have the tools to do it "proper" this works great! |
|
|
|
Post by Lucass2T on Sept 23, 2015 6:42:14 GMT -5
Wow dind't knew that method! Never seen it before!
Oh and sometimes my Dutch android phone wrongly corrects words...
Your honingjob looks very nice though!
|
|
|
|
Post by 2TDave on Sept 23, 2015 8:16:06 GMT -5
I had to run my big motor without a base gasket to get acceptable durations. Also had to shave the head for squish on the hola kit. Maybe add a head gasket for some added squish.
|
|
|
|
Post by oldgeek on Sept 23, 2015 10:16:30 GMT -5
I had to run my big motor without a base gasket to get acceptable durations. Also had to shave the head for squish on the hola kit. Maybe add a head gasket for some added squish. I had this one set up pretty good with a base gasket, screwed up and left it out during reassembly.  |
|
|
|
Post by Corrosion on Sept 23, 2015 19:58:06 GMT -5
That the kinda thing I do when I do stuff after working all day.... I try to do some fun stuff and I'm tired and I screw up!
|
|
|
|
Post by oldgeek on Sept 24, 2015 21:21:06 GMT -5
I didn't break out the degree wheel, but I did do some visual checks of BDC and TDC. With an average thickness base gasket this is what I got. So it looks like an average thickness base gasket and no head gasket, just using copper spray is going to be good. I am pretty sure that is what I used the first time around    It aint easy holding a crank at BDC with one hand and trying to take a decent picture with the other hand. Also you might be able to see the dome of this piston was not smooth like the original one was. I don't know if it is good or bad but I smoothed it out with some diamond hones I got from HF.  |
|
|
|
Post by oldgeek on Oct 3, 2015 18:56:40 GMT -5
Since my last post, I gave everything a bath and got it ready for assembly. Today I got the motor together and fired it up for a test. It started on about the 8th kick and sounds good. Tomorrow I hope to get all the plastics back on, what a PITA they are. Forecast calls for lots of rain tomorrow again so what better to do than go to the warehouse and work on scooters.  |
|
|
|
Post by Corrosion on Oct 3, 2015 22:30:22 GMT -5
Break her in. Wot blips to build cylinder pressure, then rest it. And hit it some more. I'm a bit fussy about breakin um in. But it has worked for me. I avoid the ride it like you stole it, on iron kits. It might work on nikasil. but on Iron?
|
|
