Should i pull my motor to have it ported

[Mike Grafas]

So in my other post I stated I have 2 herniated disks in my lower back and cant really ride yet, even though I feel like I might be able to somedays
I don't want to risk any more damage until I go through my physical therapy a few times and see how I feel

so ive wanted to freestyle port my motor and possibly a bored reduction nozzle sometime in the winter (even though I ride through the winter even February)

But now that I hurt my back I thought it might be a good idea to pull my motor that way I DEFINITELY cant ride, because frankly I don't trust myself and if I feel alright I might have the urge to ride
(I want to ride so f'ing bad, its been like 10 days so far and I'm getting withdrawls haha)

Its a 97 rn 701 62t raider with msd enhancer, ada 35cc head, bpipe, 9/15, stubby cone, etc, almost all basic bolt ons

I still don't have the low end I want out of it and I know I can get a little more, now some might say get a new motor but I'm getting an am hull possibly mid winter, if I find the right one for my riding style

I ride freeride, freestyle, boat chase, and surf. I mainly ride the bay are though with some big big boats plowing by

So would it be worth it to freestyle port, not sure if I should right now or wait until I have another ski, I just figured now being the ideal time so I don't have the option to ride if I'm not ready

 

[Mdavies_02]

I'd send it out to Chuck @Nuklear6 for a sweet port job. That said if you want to try to do it yourself I' don't have much advice for you as I have never done it.

But you have the time, so maybe do some research and take your time. Either way good luck and get well

Mike

 

[Mike Grafas]

I'd send it out to Chuck @Nuklear6 for a sweet port job. That said if you want to try to do it yourself I' don't have much advice for you as I have never done it.

But you have the time, so maybe do some research and take your time. Either way good luck and get well

Mike

I am capable of doing it myself but like anything else, ill don't think ill be able to as good of a job as the professionals who do it for a living

 

[Mike Grafas]

I forgot to add that if I do port it I'm going to do a bore as well, not sure how big though, pretty sure I'm still on the original top end, compression hasn't fallen off but might as well do it while it's out

 

[Big Kahuna]

not sure your question............ Do you have to pull your motor to port it? No. Just pull the cylinder off........

 

[Mike Grafas]

not sure your question............ Do you have to pull your motor to port it? No. Just pull the cylinder off........

sorry forgot to say I have to pull the motor because the cradle to bottom half bolt keeps coming loose, I can tighten it but it is not easy as I barely have room, maybe 1/8 turns at a time, and ive already tightened it about 5 times, so I need to pull the motor out to pull the bolt out, clean it and torque it the right way
basically every ride it gets loose and I can move the engine

 

[Big Kahuna]

This can cause you to strip your drive line also. Get it fixed.

 

[erik mx45]

jetworks did my old 701 and it was good job way better than stock

 

[Aidan Burns]

Send the cylinder to Matt at HPE if you do it. Beautiful work.


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[Chase Musetti]

Ported top end kit from @JetManiac


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[surfjunkie]

Pulling my motor is as hard on my back as riding. You must be able to curl a lot more weight than me.

 

[bored&stroked]

Ported top end kit from @JetManiac

Thats alot of money vs just porting his already good to go top end.

OP- of course port. Always port.

 

[Mike Grafas]

after reading a lot and people telling me I think I'm going to do the port work myself, besides if I don't go crazy with it and chamfer everything I can only gain from it.

And ill have my motor apart so I cant ride if I wanted to haha

 

[Mdavies_02]

And if anyone gives you a hard time about it just say your doing physiotherapy. Its a win win.

 

[Robbie8984]

I have just ported my cylinders and cases, took bloody ages but was really happy with the end result.

Not got any pics of the cylinder on my phone but widened the exhaust port, ground out all the transfer ports and took a fair bit of the bottom of the liners.

I'll get some pics when it's back from the machinest, having it taken out to 82mm.

If you go bigger than that just bear in mind you will need to have the squish clearance machined on the head domes.

 

[Mike Grafas]

So I just pulled my motor, got it out myself with ski on a shop cart(not the easiest/brightest idea)
And I noticed my midshaft was a little loose but I had just rebuilt it this past season?
It has a little play twisting left and right before it grabs the splines but also moving left right up and down slightly
I assume my cradle bolt loosening up caused the midshaft bearing to loosen, would that make sense?
I don't remember how tight it was when I put it together but would imagine it had little to no play right?

 

[Chase Musetti]

It should be tight. Look at the splines on the shaft and inside the mid shaft and see how bad it is. Fix it now before you ruin drive shaft and mid shaft


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[Chase Musetti]

Thats alot of money vs just porting his already good to go top end.

OP- of course port. Always port.

Hardly... he said he wants to bore it out too so he'll need piston kits as well. I'd leave porting to professionals. Then resale value is better when they know a pro did it and not a botched garage job (not saying OP will botch it, but you know what I mean)


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[Vumad]

No, I don't think you should. The stock motor can easily be tuned to have a very smooth power band. The porter motors I have ridden are not smooth. They get more power by wanting to push to higher rpm faster. My ski will maintain a consistent speed at any throttle position. Ported motors (often) want to continue to accelerate or fall off pipe.

This unpredictability can cause you to use more core. More power on the bottom is going to encourage you to do more than could contribute to your injury.

I believe you are on a superjet. Set the money aside to widen the tray or go to an AM hull that will open your stance and improve your body mechanics. You could also consider a B1 or similar. The "id rather quit than sit" isn't a great mentaility for back injuries.

I hurt my back 3 years ago. I was in denial and rode hard 4 more months until I got a Dx. I didn't buy an Am ski because I didn't expect to get better. The predator I tried was easier for me than my superjet because of the improved lateral stability.

A blaster is a good investment, and hopefully a temporary solution.

 

[Mike Grafas]

No, I don't think you should. The stock motor can easily be tuned to have a very smooth power band. The porter motors I have ridden are not smooth. They get more power by wanting to push to higher rpm faster. My ski will maintain a consistent speed at any throttle position. Ported motors (often) want to continue to accelerate or fall off pipe.

This unpredictability can cause you to use more core. More power on the bottom is going to encourage you to do more than could contribute to your injury.

I believe you are on a superjet. Set the money aside to widen the tray or go to an AM hull that will open your stance and improve your body mechanics. You could also consider a B1 or similar. The "id rather quit than sit" isn't a great mentaility for back injuries.

I hurt my back 3 years ago. I was in denial and rode hard 4 more months until I got a Dx. I didn't buy an Am ski because I didn't expect to get better. The predator I tried was easier for me than my superjet because of the improved lateral stability.

A blaster is a good investment, and hopefully a temporary solution.

Already have a built b1 so I'm probably going to ride that when I'm up to it before I jump back on the sj, I definitely get what you mean though