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cylinder hone
Posted: Wed Dec 15, 2010 12:40 am
by billyboy
i am about to purchase a tool to hone a seagull cylinder, however i am not sure about the grits of the stones i need. would anyone be able to give me some advice on this please?
Re: cylinder hone
Posted: Sat Dec 18, 2010 1:46 am
by Collector Inspector
180.
I suggest a flex hone. Bore will not need a traditional 3 stone hone. Blind cylinder 102 you can split a stone.
http://www.flexhone.com/flexhone%20for%20cylinders.htm
Pick a size that will do 102 and 40s.
Kind on port edges so you will not get into strife if you make a blue.
B
Re: cylinder hone
Posted: Sun Dec 19, 2010 5:19 am
by billyboy
ok .... thanks for the info. will check out repco tomorrow and see what they have.
P.S.....is it normal procedure to hone a seagull cylinder when new rings are installed or is it sometines not needed?
Re: cylinder hone
Posted: Sun Dec 19, 2010 7:50 am
by Collector Inspector
Yes, very normal. It is referred to as "De-Glazing" which is taking the shiny surface away. New rings will not bed in without doing it.
A 3 stone hone takes too much away as is a sizing last step after boring.
Flexhone is for making a sized bore suitable for bedding in new rings.
The young things at our modern Repco may not be very with it...................Let me know if I am wrong yeh?
B
Re: cylinder hone
Posted: Thu Dec 23, 2010 5:43 pm
by GDTRFB
I agree on the flex hone. the three armed hone will get caught on the transfer ports and mess up the hone, unless the arms of the hone are really long. I have used a flex hone for the cylinder on my vintage vespa with excellant results. New rings seated quickly and the compression went up to 140 after the hone and ring job.
Just get the flex hone the is slightly larger than the cylinder diameter, use a lot of two stroke oil when honing. Check you tube, there are lots of videos of proper honing techniques.