Crosshatching the cylinder on a 2-T ?

**Fri Sep 24, 2010 7:21 pm » Post: #1 » Download Post**

On a diesel forum I read about a guy whose bike was smoking and he found out that it was a very bad crosshatching job that caused it.

Is the crosshatching as important on a two-stroke ?

Should you crosshatch it every time you have it opened ?

Should the hatching be in a 45degree angle as described below or another angle, to retain more 2-T oil on the barrel/cylinder ?

http://www.hastingsmfg.com/ServiceTips/cylinder_bore_refinishing.htm
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Poul
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**Fri Oct 01, 2010 11:37 am » Post: #2 » Download Post**

The crosshatching is to hold an oil film, and is needed. When everything is up to temperature the piston has almost no clearance whatsoever in the bore and purely relies on a quality stroker oil to keep the aluminium from touching the plating. As soon as the film is broken it'll nip up.

It should be somewhere in the region of 60 degree.

When I pull a motor apart I will stick a ball hone up and down the cylinder a few strokes. I do this in my parts washer while pouring kero on it. This helps wash all the particles out and cleans up any lacquer on the bore allowing the rings to seal perfectly on the rebuilt motor.

Don't ever use a 3 stone hone on a stroker or you'll chip the plating off as the stones catch in the ports.

My ball hones are always slightly smaller than the bore (As Eric Gorr recommends on his website) so you're only tickling the wall.

**Fri Oct 01, 2010 4:29 pm » Post: #3 » Download Post**

Matt@TYGA wrote:My ball hones are always slightly smaller than the bore so you're only tickling the wall.

Man that sounds like some kind of sexual deviancy! Shocked

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**Sat Oct 02, 2010 2:25 am » Post: #4 » Download Post**

Sorry Dave, I can't help it.....I've known Granty for way too long and his deviant ways have rubbed off on me..........

**Sat Oct 02, 2010 4:14 am » Post: #5 » Download Post**

Ere... we've been blotto in many a seedy joint, but I don't recall anything ever rubbing off on you that was attached to me, so watch it! Laughing

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**Sat Oct 02, 2010 6:18 am » Post: #6 » Download Post**

Saying nothing....

I think this subject is closes