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I have a 98 SJ with a 5mm stroker, 85.5 bore, 175psi, dual 48 Riva powerbombs. Wondering if anyone could chime on pro's and con's of adding a Blaster mod chamber? Thanks

Im going to be getting a new head for my stroker. I have to order new domes also. Question is since I have to machine these new domes to fit the stroker would I be better off starting with larger or smaller size domes?

I have a 98 SJ and was wondering if a Skat swirl 12/17 prop would be a good prop for my ski? I was wondering if anyone had a similar setup and running a 12/17 swirl? 5mil stroker 85.5 bore Ported cases & cylinders Blowsion head 175psi MSD enhancer TBM flywheel 48 Riva Power bombs...

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Looking for some opinions on the best all around pipe for piston port 550's? I am talking bolt on no internal engine mods like porting.

Will v force work with the Boyesen intake?

I have a 87 550 with a stock PP motor except for the head being milled to 145psi. It has a Jetnetics flywheel and a PJS pipe. It's been awhile since I have messed up the older stuff. I am only running single cooling. Can someone give me a routing refresher on the pipe? Thanks

If I install a PJS pipe on my 87 550. Do I have to run a aftermarket water box?

Anyone running a R&D dry pipe without h20 injection? If so how is it working?

I am wondering what impeller would be best for top end. I have a 98 SJ with the following mods. 5mm stroker (Pro Tec) 85.5 bore ported cases and cylinders Blowsion head (175pai) R&D dry pipe 62t ported intake v force reeds 48 Riva power bombs TBM flywheel TBM super pump cone Advent...

I am wondering if anyone has any info on the R&D dry pipe for the Super Jet? I have a 98 SJ with a 85.5 bore, 5mm stroker, Blowsion head (175psi), 48 Blackjacks, v force reeds, and an Advent T3 ignition. I currently have a Speedwerx race dry pipe but have always been interested in the R&D dry...

I just received back my Speedwerx pipe for my Super jet. It turned out real nice. I had them coat it like the original powder coating.

Just wanted to say JSS is top notch. Called John there and he hooked me up with a smokin deal on a TBM charging wheel for my SJ. Very very friendly and really quick shipping. I would recommend them to anyone. Thanks John

I have a Advent T 3 ignition that I have for sale. The only reason I am thinking of getting rid of it is because I bought it to run with a Type 9 dry pipe. Well I sold the dry pipe went back to a Speedwerx pipe and lowered my compression from 195 to 175psi. Can I run this Advent with this setup...

I just jetted a set of 48 BJ's per Art's specs. He says run a 2.0 needle and seat along with a 95 (silver) spring. It should have 25psi but I am getting more like at least 30psi. Whats the deal. This is on both carbs.

I have noticed lately that on my 98 SJ from time to time if I go to start it thre is nothing there when I hit the start buttom. I hit it agin and it turns over fine. My battery is fully charged and the connections are clean and tight. It has an Advent and I TBM flywheel.

How big of a stroker can you run on an 62t cylinder?

I had to thin pump shims on my 98 Super Jet. One on each side. I lost them. I was wondering if anyone had 2 of them? I looked on Yamaha's site and it shows you have to buy them in packs of 10. It says they are 1.0mm. Thanks

What is the thread pitch on the cylinder base bolts on a 98 SJ? Is it 10x1.25 or 10x1.50?

I have a 5mm stroker with 85.5 bore running 195 psi. I was running a MSD enhancer and a b pipe with 93 octane fuel and a bit of octane booster and everythnig was fine. Last weekend I switched to a type 9 pipe and a Advent T 3 ignition and a oem flywheel. It ran awsome. This week I added water...