Take a look at my cylinder/porting...does this look right?

[skithis]

My transfer ports look like they are very overlapped. Should I match them? Is this the stock sleeve? Also, my sport port template doesn't match my intake side. My cylinder is stamped 61x and the template is labeled 61x? Do these look like the stock sleeves?ancake:

 

[Matt_E]

The intake side "doesn't fit" because you're supposed the grind the overhang off. It's a porting template - it shows you where you're supposed to port/

 

[Polish jet pilot]

Matt/E has done it before, listen to him. Matt_E, I will start this process soon as well. If I will have some Q's I will contact you, if that is ok..?

Thank you

Andrew

 

[Waternut]

I asked about this last year when porting my cylinder. The overwhelming response at the time was don't touch them unless you know exactly what you're doing or your F up your cylinder because it will change the port timing.

 

[Matt_E]

You're talking about the port mismatch, not the intake side. Right?

 

[tipafew]

You know there are pro's that will do this for you for like $150.

 

[Polish jet pilot]

I think he means intake - he places teh template on the skirt to ask whether he is doing it OK.

 

[Matt_E]

I think he means intake - he places teh template on the skirt to ask whether he is doing it OK.

Messing with the intake won't change port timing, as Waternut implied.:arms:

 

[Big Kahuna]

You know there are pro's that will do this for you for like $150.

Where?

TLR $300-350
Team Scream $300-350
Group K - $300
Riva $350.00
Wamiltons $350
Judge Motorsports $350-400

 

[skithis]

Actually Im most concerned about how the intake side template doesnt match the contour of the cylinder at all. Also, I was wondeirng if i should match the transfer port window to the transfer port tunnel? Mine are farely off.

 

[Big Kahuna]

are you referring to where the sleeve and the transfer ports do not match? that is where you "Port match" the cylinder to the sleeve.

 

[egbrig]

The reason it cost what it does is because they know why and what they are doing along with not messing up. Its one thing to sport port, its another to do higher performing work that matches with the total matching of a package. The sport port is only a minimum porting point.

 

[oxnard111]

Where?

TLR $300-350
Team Scream $300-350
Group K - $300
Riva $350.00
Wamiltons $350
Judge Motorsports $350-400

Jetworks 1 year ago $330-350

 

[Big Kahuna]

Did not list everybody, just through out some.

Jetworks seems to be inline with everybody else.

 

[Waternut]

This was the post I was thinking of. I guess I was over exagerating but "consult a pro" was enough convincing for me to not do it. http://www.x-h2o.com/threads/47680&highlight=port

Here is tha picture of what my cylinder looked like when I laid the template over top. I didn't touch my porting mismatch and only did what the two templates said to do and the ski works amazingly well.

 

[motosicko]

As far as the ports being overlapped, I found it odd on my '98' 701 that the ports in the sleeve were so far off from the cylinder cast also. After a little research found it to be normal for stock sleeves to be that way on Superjets. I thought somebody did a bad resleeve job. Worked on many 2 stroke bike motors and the ports always matched. Still seems odd to me.

 

[Matt_E]

You'll have a hard time finding that kind of mismatch in any other PWC engine.
Even the 650 Yamaha is a lot better.
Rotax port matching is a work of art compared to the 701 crap Yamaha spat out.

 

[Polish jet pilot]

I think the idea behind 61x cyl was to either race it as stock or replace it with aftermarket one for higher class thus they did not pay attention to something that would be replaced anyways..?

So to summarize: waternut's picture shows correct way to place the sport port tempalte on the intake side?

 

[bigpine007]

porting "TEMPLATE"

Just put the grinder down and slowly back away from the work bench.

 

[skithis]

Nope, I'm doing it. Theres only 1 way to learn, and thats to do it. If i dropped everything and walked away from it, what would I know now? Id be the guy who doesn't do anything his self and pays somebody else to do it...we all know somebody like that. There is a certain amount of pride in doing things yourself instead of paying somebody to do it. I've got all the info I need now folks, thanks.