KX Riders

Maintenance & Technical => KX250 / KX125 => Topic started by: MXonaKawi on June 17, 2015, 02:47:17 PM

Title: Honing Cylinder
Post by: MXonaKawi on June 17, 2015, 02:47:17 PM

Is it necessary to hone a cylinder when doing a top end rebuild?
I didn't do it on my last top end rebuild (which turned out great) but I was recently told by a friend that I should do it when I put my new piston in.
I found the flex hone for $35 bucks. I'm not trying to spend any more money right now, but if it's necessary I guess I can consider it.

Thoughts?

Title: Re: Honing Cylinder
Post by: sandblaster on June 17, 2015, 03:44:35 PM

The cross hatch pattern that you get from a correctly honed Nicasil plated cylinder helps oil adhere to the cylinder wall and helps during the break in procedure.
I don't know about anyone else but I hone mine and have no issues.

Title: Re: Honing Cylinder
Post by: LukeG on June 17, 2015, 03:47:35 PM

The abrasive material in a flex hone is too soft to do anything to a nicasil plating it just polishes it up a bit.

Title: Re: Honing Cylinder
Post by: sandblaster on June 17, 2015, 05:39:18 PM

And in fact, here is what Flex-Hone recommends:
The recommended abrasive type for nikasil plated cylinders is 240 grit aluminum oxide.
Hey, that's what I use  :-o

Title: Re: Honing Cylinder
Post by: reklessj on June 17, 2015, 06:29:19 PM

Personally I chose to use one every time rings and or piston are replaced I would spend the extra $

Title: Re: Honing Cylinder
Post by: Foxx4Beaver on June 17, 2015, 08:39:03 PM

I've always done it by hand.