Honing a two-stroke bore

[PZR]

I want to hone the bore on my 2 stroke (its been sleeved) and give it some new rings. Can anyone recomend someone intelligent in south auckland that wont fuck it up. I can courier it out of town if you know someone real good elsewhere. Also, where is a good place to get some 76mm rings for a good price?

[Motu]

If you don't trust anyone else then do it yourself with some emery tape - then you will know who to blame.

[xwhatsit]

I was wondering whether I should hone my bore when I put my engine back together (4T, mind you), so I did a lot of googling. Anyway, lots of random strange people on the internet (much like you lot) say completely different things -- some are like `you should always hone the bore, otherwise the rings will never seat and they might break and Jesus will kill your firstborn'; others say `honing is just an old wives tale, like polishing ports -- you don't need to do it, the rings will seat by themselves, just don't use any oil on the rings or bore'. What's the story here?

[The_Dover]

i thought this thread was something to do with ixion

[Ixion]

I don't need honing, my boredom skills are already honed to a precision edge. If we ever meet I am sure we will have numerous very long and very interesting discussions. I talk, you listen.

[scott411]

Concept Motors in Pukekohe (used to be DOugs engineering) are good 09 239 0083, thye do all our rebores

[pete376403]

it's always nice to radius (a tiny little bit) the edges of the ports, especially the exhaust port (because it's biggest) - helps ease the rings back in.

[barty5]

ph G K recondtioner in panmure 54 Jellicoe rd they do all our machine work and a lot for different bike shops in auck 5705336

[Motu]

it's always nice to radius (a tiny little bit) the edges of the ports, especially the exhaust port (because it's biggest) - helps ease the rings back in.

Bottle brush hone on a cheap 7.2V cordless drill gives the best finish.The drill is so gutless it gives the perfect speed to do a 45 deg crosshatch and not fast enough to catch the balls in the ports.

[PZR]

Concept Motors in Pukekohe (used to be DOugs engineering) are good 09 239 0083, thye do all our rebores

Thank god my first intelligent response, I was beginning to get worried
Cheers 411

[PZR]

Bottle brush hone on a cheap 7.2V cordless drill gives the best finish.The drill is so gutless it gives the perfect speed to do a 45 deg crosshatch and not fast enough to catch the balls in the ports.

I could do that if I only had a bottle brush hone

[PZR]

I don't need honing, my boredom skills are already honed to a precision edge. If we ever meet I am sure we will have numerous very long and very interesting discussions. I talk, you listen.

Say what? Huh! Did someone say something? Sorry I wasn't listening

[PZR]

I was wondering whether I should hone my bore when I put my engine back together (4T, mind you), so I did a lot of googling. Anyway, lots of random strange people on the internet (much like you lot) say completely different things -- some are like `you should always hone the bore, otherwise the rings will never seat and they might break and Jesus will kill your firstborn'; others say `honing is just an old wives tale, like polishing ports -- you don't need to do it, the rings will seat by themselves, just don't use any oil on the rings or bore'. What's the story here?

One thing about opinions is everyones got one. But thats just my opinion of course.
To hone or not to hone? That is the question. Is it better to have honed than never honed at all?
Its certainly hard to get a hone est opinion.

One things for sure, no motor of mine is ever being reassembled without oil. Your thoughts above may be valid depending on ring type and bore construction. You cannot hone a chrome or nikaseal bore for example. Honing was very common and effective for cast iron rings and bores in old cores

[terbang]

i thought this thread was something to do with ixion

Yup I thought so too but then realised it was 'Honing' rather than 'hooning' a two stroke bore..

[xwhatsit]

One thing about opinions is everyones got one. But thats just my opinion of course.
To hone or not to hone? That is the question. Is it better to have honed than never honed at all?
Its certainly hard to get a hone est opinion.

One things for sure, no motor of mine is ever being reassembled without oil. Your thoughts above may be valid depending on ring type and bore construction. You cannot hone a chrome or nikaseal bore for example. Honing was very common and effective for cast iron rings and bores in old cores

Yeah, I know. That's why I was interested to hear what KB thinks -- for better or worse, I do trust (in particular) Motu and Ixion's opinions over the average punter.

FWIW, the advice given was to put the rings in without oil and without a hone -- for only the first few strokes there is no oil, and they bed in super-quick -- oil apparently gets there pretty quickly. Apparently this is what BMW tells their factory engineers to do, yada yada yada. Does sound pretty scary though.

I'm keeping my old rings as they look (and measure) mint, so I don't think I really need to hone anyway. I'll be using oil though

G'luck.