Home Porting

RivMan

RivMan

doing something stupid...
Site Supporter
Location
Pinckney, MI
Has anyone bought the templates for a Kawasaki 750? If so, drop me a message, I'm wondering how they turn out.

Thanks
-Rob
 
Dutchie

Dutchie

Location
nederlands
Has anyone tried to make small exhaust ports to the side of the exhaust to make more area ?

I do this with my racing 2 stroke pocketbike and it will win :p

Is there any meat to grind this out ?

For those who don't know, these ports allow to make a bigger exhaust port without stressing the piston rings as bad.

( im dutch so i don't know the usa name for these kind of ports )

fluit.jpg
 
Dutchie

Dutchie

Location
nederlands
They sayd the same when i wanted to put them in my pocketbike but there was room :) "just a bit of room '

I also saw a 701 cylinder for sale that had a mild extra with ( wider ? ) in the middel of the exhaust port. So the stress on the rings is narrowd down while making the port wider a bit, over the 70% but not just on the whole exhaust port. Like in my picture above.

How do i explain.

A port that opens at ( for example )

70%
Then 80%
Then 70%
70%

To get more area but still maintain strengt. Just like the pic above but then with no seperate ports

Any idea's on this/ of pictures.

Greetings
 
wanderer1

wanderer1

Location
Cruising Around
Dutchie said:
Has anyone tried to make small exhaust ports to the side of the exhaust to make more area ?

I do this with my racing 2 stroke pocketbike and it will win :p

Is there any meat to grind this out ?

For those who don't know, these ports allow to make a bigger exhaust port without stressing the piston rings as bad.

( im dutch so i don't know the usa name for these kind of ports )

View attachment 216420
Click to expand...

Seen it a few other places too,but not on a stock cylinder. Nothing new about it,but a great idea
 
Dutchie

Dutchie

Location
nederlands
I know it aint new, but i wonderd of there is enough meat on a SJ stock cilinder to make these. On all my other projects they are woth te tuning !

Nobody have done this, on a stock SJ ?

Greetings
 
M

mmprestine

Location
Green Bay, WI
Racelogic is dead and gone so I am offering up my SportPort templates.

Here you go! Any one needing a SportPort template for Yamaha 701 SuperStock FreeStyle. Scanned to scale so print with scale to 100% on a 8.5x11. No instructions. Remember you also have to rework the transferports also.

And read this thread from beginning to end!

http://www.x-h2o.com/index.php?threads/home-porting.1540/ o_O
 

Attachments

  • Yamaha 701 Sportport template SuperStock_FS.pdf
    1.7 MB · Views: 465
  • Yamaha 701 Sportport template SuperStock_FS with dimensions.pdf
    948.9 KB · Views: 348
Parsonsjb88

Parsonsjb88

Location
Windsor, Ontario
mmprestine said:
Racelogic is dead and gone so I am offering up my SportPort templates.

Here you go! Any one needing a SportPort template for Yamaha 701 SuperStock FreeStyle. Scanned to scale so print with scale to 100% on a 8.5x11. No instructions. Remember you also have to rework the transferports also.

And read this thread from beginning to end!

http://www.x-h2o.com/index.php?threads/home-porting.1540/ o_O
Click to expand...
OMG Thank you so much! Literally doing mine today and was running through this thread for pointers and noticed someone posted yesterday for the first time in almost a year! You da man :)
 
Sven

Sven

Location
Airdrie, Alberta, Canada
Today I just did the port and polish of my exhaust ports and am wondering if it looks like I did a ok job? Still need to cut the bottom of the cylinder off as shown here with the other template, is this actually how much I need to cut off?IMG_3359.JPG IMG_3344.JPG IMG_3346.JPG IMG_3347.JPG IMG_3348.JPG
 
Parkersxr

Parkersxr

Location
Blythe ca
Just wanted to say thanks for the write up ! Really helped answer so many questions .


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