Port & Polish SL750's

[computersavior]

I have two SL750s and I was wondering if porting them will help out at all. One mech. told me that it doesn't do any good on these

[Bryan Glynn]

Unless you have other serious mods, no it won't. Porting is one of the last mods to make on those - they have pretty clean ports to begin with. Yamahas on the other hand, benefit greatly with no other mods - just doing some port matching really wakes them up!

[computersavior]

Do you have any suggestions for other low-cost mods??

[Bryan Glynn]

What exactly do you want to improve? There are quite a few polaris enthusiats on this site - just let us all know what you need!

[computersavior]

Mainly I'm looking for better acceleration.

[Wet Wolf]

What year SL 750s??

Wet Wolf

[computersavior]

sorry, they're '95s

[tomsl750]

I general good place to start is to add an aftermarket flame arrestor and a new set of reeds. I would suggest Boyesen reeds (Pro Series). You will see a slight higher top end with good acceleration low and mid. Also, check to make sure that your pump/impeller is in good condition to begin with. All the power mods in the world won't help with a bad pump/impeller.

[Wet Wolf]

If thats all you are looking for is more acceleration, then bore the stock exit nozzle out from 84 mm to 86 or 87 mm. you will see a big increase in low end and midrange performance. any machine shop can bore the nozzle for a minumum fee.

Bruce Wolford
Wet Wolf Tech www.wetwolf.com

[computersavior]

what is the exit nozzle??
is that the end of the pump??

[Wet Wolf]

Yes, from the very back, you have a trim nozzle (plastic), steering ring, and the exit nozzle which is attached to the pump by four bolts in the corners.

bruce

[ July 12, 2001: Message edited by: Wet Wolf ]

[SeaLion]

Bruce, the exit nozzle is not the last piece in the pump. You are right that it is the one with the 4 bolts. Working from the back forward it is actually the third piece. I know you know that but you probably made a typo. The trim is last, then comes the steering and then the exit nozzle [img]smile.gif[/img]
You are right that boring the nozzle will help acceleration but will sacrifice a little top end unless he puts your AAT in there. What really worked on my SL750 was a 92 octane compatible head mod, aftermarket reeds, 3/8" reed cage spacers, Ocean Pro Vortex F/A's and getting rid of the choke plates in favor of a primer kit. A Skat 13/18 Swirl is a nice compliment to the before mentioned items. I definitely can't leave out the Ocean Pro rideplate. It should be one of the first bolt ons.

[SeaLion]

Bruce, I just noticed that while I was typing the below, you edited your response, LOL. At least you caught it quickly [img]smile.gif[/img]

[SeaLion]

Darn it, I meant typing the above not below. Now people will get really confused [img]smile.gif[/img]

[Wet Wolf]

Yes, that was kinda confusing, but how's this.... the ROUND exit nozzle is held in place by 4 bolts at the CORNERS?!?!?!

Wet Wolf