Posts
395
Joined
4/23/2018
Location
IA
US
Doing a top end on my yz125 and I'm debating how to deglaze the cylinder. I've done some research and it seems like honing is not a good idea on nikasil. I really like the scotch brite idea but i've also read that you shouldn't do that either as it can leave tiny particles embedded in the bore (not sure on that its just what i've read and thats why I'm asking here) . Just curious to hear some methods of cylinder cleanup because I'm torn on what to do
I’ve gone against the rule of not honing, and haven’t had an issue with a ball hone. At the same time, I stopped doing that and just use scotch bright and dish soap. When I’m done I use brake cleaner and white towels. The reason for not honing any more is there really wasn’t an upside, if honing is absolutely necessary then it’s likely time for a replate anyways. I’ve used millennium in the past, but Powerseal has shorter wait times as of 6-8 weeks ago
I can’t count or remember all the cylinders I’ve used red or green scotchbrite on….. with wd40
Then suspension clean afterwards
then light coat of wd 40 until I assemble
im with the guys above, scotch brite with wd then i clean with atf fluid to clean,i atf even when they come back from fresh plating as there is always honing crap from every platers i've ever used here in the uk
When you guys are using the scotch brite method is there a specific direction you are wiping the cylinder with? Like in an 'X' pattern with the cross hatch? Or does that even matter?
The Shop
Yes
I try to replicate the cross hatch as much as possible but the scotchbrite pad is so light it deglazes more than anything
you can’t “ do it wrong “ imo
Even marginal cylinders are made usable with the scotchbrite and correct sized piston
Guys - why are you not using ball hones?
What are the drawbacks?
i was always led to believe that ball hones are great for nikasil bores, but they can be hard around the port edges on 2 strokes and can chip the plating away, i was advised when i looked in to it to get a precision hone but i just use scotchbrite instead, i'm sure one of the more experienced guys will chime in as to the pros and cons,
If you really need to hone a plated cylinder and don't want to send it out, use this Wiseco Nylon Honing Brush | Parts & Accessories | Rocky Mountain ATV/MC (rockymountainatvmc.com) with this Flex-Hone Oil | Parts & Accessories | Rocky Mountain ATV/MC (rockymountainatvmc.com) then clean up with this Flex-Hone Cylinder Wash Brush | Parts & Accessories | Rocky Mountain ATV/MC (rockymountainatvmc.com)
Friend of mine just recommended that as well. Not cheap but nice piece of kit.
Yeah, it's not cheap, but I think it's the best way to go. You won't have any concerns with chipping at the port windows, thin spots on the trailing edges, or bore changes like you do with a ball hone. I honestly try to avoid using it, but sometimes..........
If you shop around, you can find them cheaper than that. That was just the easiest place to grab a link.
The product description says for iron lined bores. Hones are bad because they get into the ports and can chip the plating catch an edge cause it to flake off.
I did that just using scotchbrite pad on my yz250 cylinder cleaning it. The cylinder had like 200 hrs. Just barely caught the edge and it flaked off a piece around an intake port. That was just by hand.
If I flaked the plating at a port edge by hand, I'd be glad that happened. If it was that loose/sensitive what were it chances going to be in a running engine?
Post a reply to: Deglazing nikasil cylinder