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Z1 - Flex Hone for Cylinder Refresh.
- BritGuyUSA
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I want to use the 'ball' type (as made by Brush Research - silicon carbide /240 grit), as I've used this type before on auto engines with good results. The type that has three stones on sprung arms don't work anywhere near as well as the flex hone units.
The closest that I can find any listing for is a 70 mm. I know this will be a tad on the tight side, but should be OK, properly lubed, for the brief time that it takes to hone a cross-hatch pattern.
Has anyone used this size flex hone in stock Z1 bores with good results?
Is there another manufacturer that makes a flex hone correctly sized for the stock 66 mm Z1 bores?
'75 Z1-B, '78 CB750K8, .79 CBX1000, '85 VF1000R, '94 XR650L, '95 Triumph Speed Triple
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- BritGuyUSA
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Do your metric/SAE conversions, Tim.
67 mm is 2 5/8 inches. Brush Research make a 2/58" flex hone.
It's getting late. My excuse and I'm sticking with it!
Crisis averted.
'75 Z1-B, '78 CB750K8, .79 CBX1000, '85 VF1000R, '94 XR650L, '95 Triumph Speed Triple
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- BritGuyUSA
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'75 Z1-B, '78 CB750K8, .79 CBX1000, '85 VF1000R, '94 XR650L, '95 Triumph Speed Triple
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- kaw-a-holic
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Jon
1977 KZ1000a1
Mesa, AZ
Phoenix Fighter Project
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- Nessism
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enginehones.com is a good resource. www.enginehones.com/fl2to2.html
I bought a hone for my 750 cylinders that I'll offer up on loan. PM me if you live in the US and want to discuss.
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- Kidkawie
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- I bleed premix
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1975 Z1 900
1994 KX250 Supermoto
2004 KX125
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- Nessism
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Kidkawie wrote: I've been using ball hones in two strokes for 20 some-odd years. They dont get caught in the ports. I soak the cylinder and hone with WD and run it for about 3 seconds, moving it up and down quick enough for a good angle. If you sit with it running in the cylinder too long you will open it up. 3-5 seconds tops.
Here is a video on how to use a flex hone... www.enginehones.com/technical.html
FYI: the recommended lubrication is flex hone oil or motor oil.
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- Kidkawie
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Besides clamping a piston in a vice, the video looks good.
1975 Z1 900
1994 KX250 Supermoto
2004 KX125
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- MDZ1rider
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- BritGuyUSA
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MDZ1rider wrote: I've used the 2 5/8 Flex hone on 2 900's and recently bought a 70mm for a 1000 I'm currently working on. I haven't started the 100 yet, but the 2 900's had no problems with ring seating or smoke. I splurged and ordered their oil as well. I think it was 1/2 quart. I've done 3 blocks (12 cylinders) and probably still have 3/4 left.
Thanks! I've ordered the 2 5/8 flex hone. In the past I've used good old 3-in-ONE oil as the hone lubricant with good results (It's made by W-D 40). I guess that most lightweight petroleum distillate oils will do the job - you just need to make sure that you use enough of it to soak the 'grit balls' and give the cylinder wall a good covering too.
'75 Z1-B, '78 CB750K8, .79 CBX1000, '85 VF1000R, '94 XR650L, '95 Triumph Speed Triple
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- BritGuyUSA
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kaw-a-holic wrote: I did mine with the tri-stone set up and it turned out great. I would like to see a pic when your done with yours to see the difference.
It's going to be a while before I'm ready to hone. I've got to scrape gaskets, strip off PO's paint job, wet-blast and ultrasonic these cylinders beforehand. I'm just getting my ducks in a row. I'm one of those who hates to 'need and not have'.
'75 Z1-B, '78 CB750K8, .79 CBX1000, '85 VF1000R, '94 XR650L, '95 Triumph Speed Triple
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- kaw-a-holic
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Jon
1977 KZ1000a1
Mesa, AZ
Phoenix Fighter Project
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