porting

hello guys, any one on here do porting and polishing.

How much do machine shops charge on average to mill a head and port/polish the ports? I'm wanting to get some work done on my head but don't want a sticker shock.

In the midst of porting a blue clone head... Is it alright to remove material from the valve guide protruding from the bottom of the intake and exhaust ports? Either cut them flush with the port walls or grind them down some.

thought on how to do this for this specific engine, not like the one on affordablegokarts. And is there any impressive gains?

hi all im new to this minibike stuff i have a older baja warrior jd 5.5 and i pulled itout of storage and got it running again and it ran good but did notice a lil bog in throttle about midway so i tore the carb out and freshened it up and then pulled the head off and did a mild port/clean up...

I have a 2.8hp enigne, I was wondering if I could port the cylinder heads and exhasut port on this motor? If so, can anyone tell me how to do so, as well pics would be most helpful. :scooter:

got started on porting the combustion chamber area, still need to clean up around the valves and polish her up. I will post more pics and updates as i go. The ports themselves will be fun :/ How does JB Weld hold up to gasoline? my dremel is a single speed, was in a hurry when i bought...

if you want your stock motor to have this kind of response with stock cam, rockers etc. for 50$ shoot me up a pm.:smile: http://www.youtube.com/watch?v=Syx6nANs1-E

I have just started "cleaning up" the ports on my 5hp, and I am also going to shave the eyebrows. I have lots of pics of what I did besides the ones that I will post in this thread. I would like to know: Where should I cut the eyebrows back to? Do I remove this metal? (what I am pointing to)...

Has anyone ever smoothed out the threads in the exhaust chamber to increase flow? If not, Should it work?

Its rough right now but just want some input. I still have to clean up the back side of the D too so dont jump on me lol. Whats everyone doing with the exhaust port? Thanks guys

So, I have this head and a Foredom flex tool with lots of different abrasives i use for restoring old blades. I can get down to mirror finish if needed. Where do I start? I have referenced some protrusions and sharp edges in these photographs and I was hoping some of the guys here could me...

Flathead Porting I found this and wanted to post it, there have been a lot of posts lately about asking about how to port or cut eye brows on a flat head. I hope this helps those interested to get a better understanding of how to do it with the pictures of what it should look like.

Ok, so from everything I have read on porting these OHV engines the focus on the intake side is definitely on smoothing the corner short side radius and then grinding down the valve guide that is protruding into the intake. Then smooth things out, but not too much so as to still allow the fuel...

Here ya go!!

This is my first port job,And do not let the pics fool ya my camra flash made some angles in the bowl area and the seat of the Short side look uneven,but in fact they are damn close to each other.I still have a bit to do but I am 95% done. boogyman Gallery - Old Mini Bikes Photo Gallery

What is unshrouding a valve? When you do this a bigger valve is not needed. Correct? Can anyone show me a picture of what material needs to be removed to do this? Maybe a before and after. Also, what is short side porting?

Hi all. I've run into a problem that I cant quite figure out. Sorry for the long read but I hope you can help. I've recently ported my engine head and I have milled the head by .015" and no doubt the flow has increased, but I seem to be getting the results of an extremely rich jet, but its...

Does anyone have any pictures of a ported head they could post to give a better idea of where material should be removed on the clone head. Just looking for some mild porting to go with a mild 200. Milled 160 head (.030 ). I have a fari idea what I want to do but I would prefer to see a...

I need to port my head, and mill .080". Is this something I can do at home will a drill press? How do I do this? I am not sure what I am suppose to be porting and milling