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Now that I look closer, it's definitely a Mach 1. I'm 100% sure.

You can tell size by that picture??? I'd guess Mach I, because the Mach II's were freaking expensive, and just wouldn't make sense on a 650. Did it say it has a 701?

I would because they're reusable... whereas a head gasket is like $20 a pop. Me, I'd send it back too, but I have girdle heads in stock :biggrin:

Reeds are a touchy subject. If your engine isn't tuned well, or for the reeds, they won't reach their potential.

Yeah, but to modify a stock head is $100, and at least with the Riva you use o-ring seals (which are reusable, so you save some money there). Who'd you buy it from? I don't think that was a great deal, but it's still worth it. It's the dry pipes that really kill the cylinders, so you should...

I don't know if it's true or not, but someone told me that was a weld mark... sometimes they are not so smooth and they'll cut your finger if you slide it along the shaft.

I'm not sure either, but it was kinda funny when he broke his Lenzi hull, then his Dad posted that it's supposed to break, lol. I wish I were the kid, even if he's spoiled or whatever. I had to save up forever for my first ski and it was a chitty Seadoo :frown:

All that matters is that it's not a B pipe :wink:

That poor kid, I feel really bad for him. I hope his parents buy him a new Lenzi ski to make the tears go away. Also a new Hydrospace to race in the Formula class if he ever makes to to California :arms:

How's your ski coming along?

Yes, they don't check for aftermarket top decks.

Ehh, you don't need a gage, just sick your finger over the hole :bigeyes:

I think on a stock 701 cylinder you wouldn't see the difference (Group K claims their 650 can hang with the 701). But you might as well always go with X cases, they can be found dirt cheap and a 61X engine is worth more than a 6M6 if you ever decide to sell it. Bigger reeds is always...

You can get 1211 from denniskirk.com

That's not a stock prop, it comes as a 13/17.

It doesn't in theory, because it's the same volume of air. But with higher compression your engine can tolerate richer jetting specs (more compression = runs hotter = burns more completely). You should always aim for correct jetting though.

Rivet, rivet.

:werd: Paint the bottom sides.

You can adjust the pipe screws anytime you want, but you won't know how much water is coming out of them until you use the method that geek described above. It's not an exact science, but you'll be able to see the difference in flow between say 1/4 turn out, and 1/2 turn out.

That looks REALLY nice :cool2: