Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
Sounds like a Mission Yamaha port job, they had some really wild port specs.
porting question
- Thread starter WILD_KYLE
- Start date
Sounds like a Mission Yamaha port job, they had some really wild port specs.
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
It all depends on port setup.
If the roof is raised to much then your not going to have much bottom end power. You may could cheat it with a really low pitch prop but you may just be chasing your tail.
- Location
- ft worth tx
hhmmm
cookerq62
Life's Been Good
- Location
- Upper Bucks, PA
I had a 61x @ 83mm that had the exhaust ports raised a bit more than a 62t cylinder and it pulled a 12/17 cutback skat swirl & stock nozzle to the rev limiter on glass without a problem. I Had a protec race limited cast head on it and it was only putting out 135-140psi with a fairly tight squish (0.035" if I remember). If you do run it have a builder check out the ports and do the math to make sure you get the compression where you want it. The cylinder I had the exhaust ports were kinda square.
- Location
- ft worth tx
any more advice?
ATS_Aaron
X-
- Location
- Shady Shores, TX
You are pretty much out of options. You've got a couple choices:
1. use either of these wildly ported cylinders and then add every other low end band aid you can think of (higher compression, total loss with lots of timing, small impeller, etc) to try and get some bottom end out of it and see if that is good enough for you...oh yeah and be permanently haunted by the fact you are running a sub-optimal setup, and know deep inside that you should have done it right the first time.
or
2. buy a different cylinder, preferably one already freestyle ported.
or
3. Give up on patching your old motor back together and buy my old Team Scream 828cc stroker and KNOW that you can't get more braap for the $$$ anywhere else in the world.
- Location
- ft worth tx
if i had the doe i so would! i just thought my 81mm wasn't too big but i guess it is
wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
Be careful putting a combination together that isn't really what you are needing.
In the end like Aaron said, you will wish you had did it right the first time, after lean-seizing it a couple times or jetting issues that never seem to go away.
If you really don't have the scratch right now, JFW has got it right, sell whatever parts you don't want, don't need, or can't use and get up enough to buy the RIGHT parts the FIRST time.
Plenty of builders on here that will help you out and get you going in the right direction.
You will be happy when it is all over.
The reason I know is I learned many of my lessions the hard way, by trying it anyway you could to make it work and by the time you are done, you spent close to (or more) in money AND TIME than you would have if you had just did it the "right way".
Brian
In the end like Aaron said, you will wish you had did it right the first time, after lean-seizing it a couple times or jetting issues that never seem to go away.
If you really don't have the scratch right now, JFW has got it right, sell whatever parts you don't want, don't need, or can't use and get up enough to buy the RIGHT parts the FIRST time.
Plenty of builders on here that will help you out and get you going in the right direction.
You will be happy when it is all over.
The reason I know is I learned many of my lessions the hard way, by trying it anyway you could to make it work and by the time you are done, you spent close to (or more) in money AND TIME than you would have if you had just did it the "right way".
Brian
- Location
- ft worth tx
yup that's what im gonna do sell them both and maybe have enough for a freestyle one.. this was a super stock race ski and i just blew it up for the second time so im starting off all over
wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
When you are ready, we would be willing to look at what you have and work with you to get you going again.
Brian
- Location
- ft worth tx
how much can i sell these for to get me started on my new motor ones the 61x re sleeved to a 84mm with epoxy and the other is a 81mm 61x and both are race ported
- Location
- ft worth tx
oh and both need a bore
- Location
- ft worth tx
bump
If both need to be bored before they are useable, I doubt you'll get much more than about $50-$75 each. But it's ebay and they're worth whatever people are willing to pay. Just set your starting bid at the lowest you're willing to let them go and hope for the best.
- Location
- ft worth tx
yeah id rather not do the ebay thing maybe ill trade both for 1 61x