Impossible or improbable?

www.125power.com · Crazy Courier Joined: 04 Jan 2006 Karma :

Hey all, when the weather brightens up i am going to rebuild my engine (cbr125) and go over the whole thing with a fine tooth comb as to say. I will be setting valve clearnces as accurate as possible and advancing the cam 4-8degrees to help mid range.
Also while its in bits i thought id polish up the ports to help things a little in that respect.
However i have a polishing kit that makes stuff shiny. Sounds about right huh?
But when you polish a port you DONT WANT IT SHINY! the aim is as smooth as possible without adding a shine to it. The reason being petrol vapour starts to seperate and petol collects on the walls and roof of the port as condensation (regardless of temp) occurs.
how the hell do i make my port smooth as posible without maing it shiny?
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veeeffarr · Super Spammer Joined: 22 Jul 2004 Karma :

Fine grade emery paper?

ZRX61 · Victor Meldrew Joined: 05 Nov 2003 Karma :

veeeffarr · Super Spammer Joined: 22 Jul 2004 Karma :

feef · Energiser Bunny Joined: 11 Feb 2002 Karma :

tbh, doing that to a CBR 125 engine sounds like a long winded, and pointless exercise. Neutral

a
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ZRX61 · Victor Meldrew Joined: 05 Nov 2003 Karma :

dodsi · Dirty Carny Joined: 06 Aug 2004 Karma :

Is your CBR125 a repsol colour scheme one?

If so I saw you in hartlepool today, I was the guy on one of them rare green ZX6R's.

Very Happy

Parmo Paul · Crazy Courier Joined: 09 Oct 2005 Karma :

you want this.....

https://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=9903&item=8035682329&rd=1&ssPageName=WIN:POST0:RECO:BID

A valve port grinder and grinding paste.
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veeeffarr · Super Spammer Joined: 22 Jul 2004 Karma :

Be told.

Aikman666 · World Chat Champion Joined: 20 Dec 2004 Karma :

www.125power.com · Crazy Courier Joined: 04 Jan 2006 Karma :

The point of doing this to a cbr is so if it fucks up it fucks up its a 125 at end of day.........learn on the cheap to replace bikes, this make sense yet???
dodsi
Yep it's repsol has a nicley bashed micron and i had a black mohekan on my helmet. V.nice bike by the way Thumbs Up

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feef · Energiser Bunny Joined: 11 Feb 2002 Karma :

Davo · Davo To The Rescue! Joined: 05 Apr 2004 Karma :

If I was you I'd go and find a cheap spares or repairs job off of ebay or something similar, and do the work on that engine.

Remember the old motto, If it ain't broke, DON'T fix it

www.125power.com · Crazy Courier Joined: 04 Jan 2006 Karma :

i only have to replace the top block..........the part with the ports in... Id rather replace a top block for a 125 than from a 600 etc
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www.125power.com · Crazy Courier Joined: 04 Jan 2006 Karma :

Id love to have 2 bikes to play with but, i only have space for one. One would have to live outside wich i wouldnt waste time getting a project engine filled with water everynight
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dodsi · Dirty Carny Joined: 06 Aug 2004 Karma :

ZRX61 · Victor Meldrew Joined: 05 Nov 2003 Karma :

www.125power.com · Crazy Courier Joined: 04 Jan 2006 Karma :

Well sorrrrrrrrrreeeeeeeeee Exclamation

But up here we just call em top block's, you can phone a shop and order a "top block" etc Granted lots of people call them cylinder heads, but with an OHC the cylinder head isnt really the head of the engine now is it?
The rocker cover is the top most part of an OHC. Hence "top block" because it is blocked shaped not like a rocker cover wich tend to be a lot more flat
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stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

Maybe not the way to do it (never tried myself) but could you not polish it then 'dull' it off again using some slightly coarser grinding compound?
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ZRX61 · Victor Meldrew Joined: 05 Nov 2003 Karma :

www.125power.com · Crazy Courier Joined: 04 Jan 2006 Karma :

EDIT
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www.125power.com · Crazy Courier Joined: 04 Jan 2006 Karma :

no its not part of my head you muppet, i havnt crashed that fast yet..............
okay you call your helmet a helmet, we call ours a lid......by we i mean, its a slang name if you like, that many people use
What i call my parts and what you call yours is of no relevance to this disscussion.

Lots of mechanic's and workshops use improper terminology and "nicknames" for parts and tools, so why should I have to type the fucker's out just to please you? Every fucker else new what a "top block" was, even if they wouldnt call it that themselves.

You may call it a cotter pin i call it a split pin. Whats the fucking difference? Ask for one you get the same thing.
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Zimbo · World Chat Champion Joined: 09 Jul 2004 Karma :

You want the exhaust ports smooth and shiny. The inlet side you want rough rather than smooth, aids swirl or something technical like that I believe?

stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

Just to stop you both bickering, please referr to the American: English translation section in your haynes manual.

In the UK I would do up a set screw on my mudguard with a 13mm spanner.

In the USA I would tighten a bolt on my fender with a 1/2" wrench.

Different terms, same thing.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

MarJay · But it's British! Joined: 15 Sep 2003 Karma :