polished ports

How would I go about polishing ports on the engine. I have the dremel with the felt tip and polishing compound. I should probably polish the exhaust and intake ports. How should I go about this. Also, I took apart the airbox, and noticed the pathetically weak air filter. Would I be able to use regular dirt-bike filter foam on it?

Re: polished ports

flannelman /

dude i dont know what other people would say but i got a k&N breather filter on mine as long a you dont drive in the rain or go crazy washing your bike it should be all good

polishing now i know do you got the brown and white bars

and some 100grit sand papper

Re: polished ports

flannelman /

sorry i ment a 150 now that is the stuff

make sure you dont go to crazy on it unless got an exta motor

Re: polished ports

Never use foam in a moped carb....it will restrict the air too much....been there done that. Stick with your og filter.

Re: polished ports

flannelman /

og ????? screw that it let in to much dirt

Re: polished ports

Ron Brown /

Chris,

Never say never. I have foam in all 3 of my peds.

Ron

Re: polished ports

InfectedBootSector /

I was going to say... the larger carbs gennerally have foam inserts inside the filter element.

Re: polished ports

hey man

when polishing the ports start out with the exhaust port first.

polish till it looks like glass....do not enlarge the port.

i would lightly polish intakes and transfers but thats all

also check to see if your exhaust pipe needs to be cleaned out

Re: polished ports

chuck russo va /

i ported mt exhuast with a dremal and got 3-4 miles an hour on top end and my midrange is better also

Re: polished ports

should I polish the head too?

Re: polished ports

flannelman /

first of all dont use a dremel it could get out of control then you would be f@#k take it from me dremel take a lot of quick

the question i should ask you is how much time do you want to spend on it

and have you shave your head yet

because i polish my head right before i go on trip because the carbon builds up now shaving will give you a higher compression the go making it a little bit fast and the polish surface make for a nice tight seal

Re: polished ports

No it's stock. I already did it anyway.

Re: polished ports

merlin311 /

use a cheapy dremel from harbor frieght those things are so powerless no way it can get away

Re: polished ports

flannelman /

no dude you dealing with a soft metal

allyou want to do is clean the inside up a little not make a huge hole

Re: polished ports

flannelbud... you are talking about the wrong part of the deal... the tool itself does not matter... its the type of bit you have in it that matters.

If you have a sanding or buffing bit in it... no problem at all

If you have a carbide cutter in it... THEN you have to be careful.

Thats what matters.

By the way.. the whole deal with polishing ports is way overrated... it does little or nothing for performance.

I also don't 'de-carbonize' heads either.. (unless they are really really thickly caked on).

That pays NO advantage.... in fact it DECREASES performance.

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