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Hi guys, Can anybody elaborate on why would a smaller diameter 140mm vs oem 144mm, be better for e.g. freestyle? Is is the main advantege in the form of greater thrust? What would be the results of installing a mag pump to an OEM ski?? Thanks! Andrew

Hi All! I want to install a 48mm carb on my custom 550 pp Kawi (full modded engine, ported, westcoast pipe and waterbox, hi -comp head, ported L&S cyl, etc) I ride sweetwater at sea level. Need your professional help here..looking for bottom punch..

Hi all, I've been riding a 550 for a few seasons now. I put a lot of work and money into my ski (and like it very much), BUT...this still will be a ski with a 112mm pump, not 144mm like Ymahas....and I feel that this is the biggest obstacle in getting the ski in the air, throttle response (or...

As in topic? Can it be done? What about if jornals and web shims are made out of one piece?? You drill them? But that weakens the crank iself! Maybe there are TWO types of kawi 550 cranks? Who knows? Thank you! Andrew

Hello, I bought a PJS crank rebuild kit off ebay. The parts look quite solid (it is actually manufactured in Japan by Toko). The bearings look also solid and have very little play. It's all good. My question: It seems that when rebuilding a 550 crank you must drill out (or somehow...

Hello, I bought a PJS crank rebuild kit off ebay. The parts look quite solid (it is actually manufactured in Japan by Toko). The bearings look also solid and have very little play. It's all good. My question: It seems that when rebuilding a 550 crank you must drill out (or somehow...

Hi there, Is the 650sx pump much bigger thn the 550sx? I was thinking that maybe I could put a 650 pump.... and then use the trim system from an X2..... what do you think.... Thank you! Andrew

Hello everybody! If you want to do something right (not count on workshops etc) just invite a few mechanically inclined friends, carry your ski to 3rd floor and put it on the table in the living room, and start taking stuff off... :) (dont forget the beer) :) I decided that I want to build...

Last seaon I gutted my waterbox..e sound was nice and louder (the way I like engines to run )...nice deep grump... Can I get of the waterbox completely? I think the old skis with the exhaust outlet on the nose had no w/b. Coul I route the exhuasy pipe (rubber) via shorter way, eg. turning...

Hey guys, Q1: I have a roundbody BN carb in my 550sx. It is a good carb, big inatke diameter and so on. No ability to replace jets so usually they get boared. What is a carb that you would recommend as an aftermarket one? If I decide to switch carbs I would like to have something that will...

Should I get a PJS or WSM? Similar pricing. I will have WSM pistons. My engine is piston port, if that matters somehow. The kit is a full one including everything. Regards, Andrew

As in the title.... if somebody has maybe a kit like that I will be glad to purchase it. Or maybe some instructions/pics then I will make my own. What do you guys recommend? I know some of you will say it's a waste of money but I already wasted too much on my ski anyways...:dunno: Regards...

Hey guys, Anybody can provide me with an adequate nozzle diameter for my setup? I have a skkatrak 15 straight, ported piston port engine, etc. I want as much low end punch as possible. It would be nice to hear your opinions. Regards, Andrew

Hey there! I saw the madpower ski @ Japanese site and it is truly amazing ski (just the time it took to do it that way). I am gonna rebuild my ski this winter and saw the tubbies on the madpower ski. ANybody done that mod and actually rode the ski? I am not talking about SJ/SXR's but the...