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Workshop => Engine and Bottom End => Topic started by: broken1 on September 15, 2013, 10:49:00 PM

Title: Cylinder honing question
Post by: broken1 on September 15, 2013, 10:49:00 PM

I was wanting to hone a couple cylinder's so I got a shoe hone from napa. I'm doing a 250r cylinder & 200cc 4-stroke cylinder. I know there needs to be about a 30deg cross hatch but my question is would a ball hone be better to finish off with & how would that work in the 2-stroke cylinder without breaking the hone balls on the ports?

Title: Cylinder honing question
Post by: christph on September 15, 2013, 11:19:22 PM

I've used ball hones on my two stroke cylinders many times.  So long as you have the right size hone--not too tight--they work great.  It is certainly easier than a shoe hone which--in my experience--gets hung up on the ports and doesn't work well on the base of the cylinder (where the sleeve arches on both sides).  Rocky Mountain sells many sizes of ball hones at a good price.  I also use their honing oil.  http://www.rockymountainatvmc.com/p/43/-/171/989/-/26582/Flex-Hone-Cylinder-Ball-Hone?term=ball%20hones

Title: Cylinder honing question
Post by: rsss396 on September 16, 2013, 07:59:16 AM

I use a 400 grit ball hone on all my cylinders

Title: Cylinder honing question
Post by: broken1 on September 16, 2013, 09:17:06 AM

Thanks for the help guys. I'll return the shoe hone & get a ball hone.

Title: Cylinder honing question
Post by: rsss396 on September 16, 2013, 09:25:12 AM

I run the hone at fairly slow rpm, and hone from the top and the bottom of the cylinder. But I only hone it enough to give the cylinder a nice cross hatch and stop you dont want to remove anymore material than you have to.

Title: Cylinder honing question
Post by: C-Leigh Racing on September 16, 2013, 09:42:01 AM

You ever tried a rod honing machine to finish hone David ?.
My bore man starts out using 400 & then switch 600 grit for the finish. Once I have the cylinder back to complete, I champher the ports & then polish the bore some with 1500 grit flapper wheel, take some of the tooth out of the finish hone to make the rings last longer.
Neil

Title: Cylinder honing question
Post by: rsss396 on September 16, 2013, 11:06:45 AM

no but I have the Lisle hone like this that I have used in my milling machine, I am not the most confident using it so I dont use it for anyone but myself. I am just a amature machinest at best :)


(http://cdn2.bigcommerce.com/server4900/f4083/products/9595/images/59561/LIS-15000__36815.1372348001.1280.1280.jpg)
I like to always go over ports like you do, but have never went over the bore finish like that. For my own stuff I dont seam to wear rings out from bore finish more from having extremely large exhaust ports and thin bridges, so I end up changing the rings by mid season.