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I have a 144 pump with fairly fresh bearings but i'm positive that my alignment is off. Getting a whirring sound from my pump area while riding. A local rider who's kind of my go to guy said its likely a bearing, could be one of the pump bearings, could be midshaft. Is it real obvious which...

Ok, I know nothing about this, but this photo is fairly amazing. I guess its happening again this coming Friday? Anyhow... wanted to share.

Ok, i'm really just venting here... if you've seen any of my threads you know i've been wrestling with my ski for quite some time. So I ride my ski this weekend. I've just been dealing with the low end bog that I can't solve. Its been rideable, idles, planes etc... just has this massive bog...

I'm so sick of starting threads in the driveline section...:banghead: I searched a bunch and didn't find anything, so sorry if this has been covered. So i'm working on my ski tonight, and decide to double check the compression. I checked it a week ago and it was 155/160-ish, and seemed to hold...

Try to keep this short and sweet. Have 61x, hammer ported by groupK. Installed ProTec C2 head w/37cc domes. They claim I should see 185psi. I get 155&160. Protec claims it's because of the porting. Is this true? Can it change it that much?

I feel like this has been covered, but I couldn't find anything. Are there any sweet big CC 2 cyl couch motors to keep an eye out for that would provide the power of a big bore? 800-900cc? I know it will never be as awesome as the big name BB mills. And I imagine that the porting is for more...

I've been addressing a number of issues on my ski. The latest batch required me to open the e-box and attempt to repair the coil. When I put everything back together and closed up the e-box I started the ski in my shop. It idles like it should, but when I give give it throttle nothing...

Alright ya'll.... I've tried so many variations of carb tuning, including trying a buddy's carb. It feels like what I believe is a low end bog. I've used a variety of low jets and low speed screw settings. I can't even recall but its been everything from a 130 to a 112.5. None of this has...

At lake now, friend riding ski, exhaust hose came loose,(melted, can't put back on today) filled hull, almost sank. Yamaha 701. Protec head, ported, bpipe, etc. Freshwater. Pulled plugs, water comes out of the front cylinder when cranking. How do I stop rust from forming on Crank? Can't...

I have a ported, limited 701, single carb and running a 12/17 swirl. Feels like its loading up down low. I've been jacking with my carb and nothing changes. What do ya'll reccomend?

Ok, i've done more reading on carb tuning than I care to know. The good news is that I know more than I ever did. Thanks to the Watcon and GroupK tuning guides on here. Very informative... My problem: Ski is bogging at low RPM. I do not have a tach, so i'll refer to amount of throttle. From 0...

I was at the local Yamaha dealer today and out of curiosity, I asked what Plug was reccomended for my ski. He came back with NGK B8ES Currently it has BR8HS, thats what was in it when i bought it. On my old ski I ran BR8ES. Apparently the R has a resistor, and the difference between the...

I'm on the hunt for a FX-1 Midshaft. I haevn't pulled mine out to get the length, but just scanning around, it looks like there are other models that a close to the same length. Has anyone else used something other than a factor FX1 midshaft? Possibly a Superjet model cut down or...? Just...

So I got my pole installed for the 4th time (gonna have to take it off again tonight, but I digress) and i've quickly realized that I have no way to hold the pole up to work on the ski. I've used a rubber mallet or a pair of Vice grips to keep it in place so far, but figured there has to be a...

I'm borrowing a buddies metal SJ waterbox but need to give it back. I've been on eBay looking at different ones and it looks like I might be able to use one its off a Seadoo 650. I've sent a e-mail asking for diminsions etc, but wanted to ask ya'll what you thought. Has anyone used...

In the course of my build I've managed to lose a number of parts. Last night I realized I do not have the large washers with the notch in them that the engine mount bolts go through. I believe these are a 'cam' style washer that facilitate engine alignment. Is it possible to align a engine...

Finally putting my project ski together and i've run into the first of many snags. The previous owner had mounting points for an e-box other than a standard FX1 unit. The unit I have has the single mount to each side that wraps around to the back of the ebox with two nuts welded on. I'm...

Since i'm still learning I figured i'd ask rather than guess. I have a freshly shortened shaft (insert penis jokes here). Fresh bearing pump body. I dont have a press, but I know a guy LOL... but seriously I do know a guy. What order should I press everything together? bearing on shaft...

What is the essential list of things I should take/do to prevent corrosion etc? I have a flush kit, figure I should use it at the end of each day? I've read that people hose down the engine bay with WD40 or silicone spray, but I wasn't sure if its important or helpful. What else?

I'd rather not throw down $45 for the X-metal Stainless pinch bolts. I know they make high quality stuff, but I have to think there are alternatives. Has anyone used 14mm stainless hardware and made their own before? The thru bolt that I have is too long and I don't really want to washer...