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The sxr1500 is pretty large for a standup with all the room for the biggest engine you could stuff in it. They're excellent in chop and carve like no other. They're pretty cheap to find as people take the guts out and put them in the kommandor or pro watercraft hulls and go race.

Seems like I ordered keihin jets from wsm but I can't quite remember

I went back and found my old notes from that ski. I used the shortest spring in the rebuild kits, 78 pilot, 50 mid and 140 main. I've seen the main jet range from 132 up to 140.

Those carbs are not easy to tune. I ran them for a season or two when I built my conversion ski several years ago. I can recall going up on the pilot and middle jets 1 or 2 sizes. I did lower popoff a little as well and removed 2 of the 3 screens as well as the rubber grommets on the air box. I...

If you might want to put bigger carbs on it at a later date and already have the engine apart, then definitely add a 2nd pulse. Otherwise, it's not necessary with stock 38s. I will say that I'd you decide to port the cylinder and cases abd more cc's then I would put a set of 44s pr 46s on it...

The outlet of the chamber. There's a tube that injects water into the outlet where the exhaust goes into the waterbox both to cool the exhaust hose and actually injecting water into the stinger adds back pressure at the outlet which will increase rpm and horsepower on the top end. When tuned...

only one way to route your cooling with a single line, through the engine then through the bottom of the head pipe, out of the top with a tee on the outlet with one end going to a pisser and the other into the stinger.

Why do that to an fx1? I think this project would be perfect for a sxr1500 hull. You have a lot more real estate to work with. It looks as if you're making a fx1 (rare desirable hull) and turn it into a x2 with a katana seat. I'm all for innovation and creativity but I'm a little saddened to...

my pipe definitely gets hot as well as i have the screws just above cracked open. i have the top and middle screw cracked on my engine, around 1/2 turn out combined. i also have 2- 1/2 lines coming from the pump to a manifold so the engine, pipe, and stinger are fed seperately. so the headpipe...

The chamber is visibly different. 650 chamber is smoother looking while the newer chambers have some destinct angles in them. The older headpipes only have 2 injection screws with a non adjustable 3rd hole in the bottom..

I bet you could put the 95g spring back in and change the 75 jet in the return for a 80 or 85 jet and it will smooth out for you. The jetting and popoff also affects the fuel pressure as well. Just going from a 70 to 80 return jet made a tremendous difference on my engine..

Several different ways to skin a cat none are wrong and everyone has their reasons for why they do things the way they do. I'm sure where the water injection point will work best depends on the entire setup from pump load, jetting, port timing and ignition timing. According to factory pipe who...

I can't really see water backflowing through the headpipe on the bpipe but i have seen orings on aftermarket heads and head gaskets leak water into the engine. Also seen open style flame arrestors cause the same thing as well. I have seen water back up like you're saying with the rrp laydown...

The headpipe I saw had the injection point close to where the middle screw is located. A hole was drilled into the water jacket and and into the exhaust stream and welded back solid for a boss to tap. I'm guessing where you drill has a nice solid area to drill and tap into since you did it close...

ive seen that modification done before and have strongly considered doing it to my headpipe even though all screws turn. i bet it probably works better than the screws.

I've used dual 44s teed to a single pulse with no issues in the past. Oem 38s were installed with a single fuel pump on the rear carb with the slave carb in the front from yamaha..

This is how i set my skis up that have 2 1/2 lines in the hull and run a b pipe style exhaust.

"But I was just asking what not to do"

It's not so bad under the tray where turf will cover up any nicks in the tray. The angle grinder with a flapdisk isn't as harsh as you might think. It also removes gel cost quickly.

A riding friend picked up a brawler recently and seems to really like it. His is carbon with a dasa 950 stroker setup in it. He can flatwater flip it. With some fresh paint and turf, yours will feel and look like a new ski