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  1. #11
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    I like the first video better.

    You can pretty much hear the engine sounding a little deeper, and more of a droning sound. (in the second video)

    After you dialed it in, (first video) it's higher pitched and screams much better. Pi$$ed off chainsaw is how I describe it.

    Good job man. Looking at the pics you posted, the electronics install looks clean. Like where you located it with the exhaust valve motor deleted. Did you tap all those mounting bolt holes for the straps and such?

  2. #12
    I'D RATHER SWEAT THAN SHIVER hyoctane23's Avatar
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    Quote Originally Posted by xlint89 View Post
    I like the first video better.

    You can pretty much hear the engine sounding a little deeper, and more of a droning sound. (in the second video)

    After you dialed it in, (first video) it's higher pitched and screams much better. Pi$$ed off chainsaw is how I describe it.

    Good job man. Looking at the pics you posted, the electronics install looks clean. Like where you located it with the exhaust valve motor deleted. Did you tap all those mounting bolt holes for the straps and such?
    Oh hell yeah! It sounds crazy in person hearing it humming at those RPMs.

    I've seen a few MSD installations where the components were bolted directly onto the side of the hull and I didn't like it so I installed everything on a 1/4" plate. I drilled and tapped every single bolt on the plate.

    A few other pictures...the dual pickup using a modified Yamaha pickup. I'm running dual external pumps so I wanted to have an individual line feeding each pump. Also some pictures of the motor port work and polished exhaust ports. I literally spent DAYS AND DAYS polishing and smoothing any casting lines in the exhaust port and auxiliary exhaust ports. I know it didn't do much but there is no carbon deposits when I pulled the motor to install the MSD.
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  3. #13

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    Awesome build.

  4. #14
    I'D RATHER SWEAT THAN SHIVER hyoctane23's Avatar
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    Quote Originally Posted by sdlvx View Post
    Awesome build.
    Thanks, man! It's been a pretty fun build, even with my OCD kicking in lol. I wish I knew even 10% of all the little tricks the guys did back in the day for that slight edge over those XPs.


  5. #15
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    Quote Originally Posted by hyoctane23 View Post
    Thanks, man! It's been a pretty fun build, even with my OCD kicking in lol. I wish I knew even 10% of all the little tricks the guys did back in the day for that slight edge over those XPs.
    Impressed. And I wish I knew 10% of what you guys know. Killer job!

  6. #16
    I'D RATHER SWEAT THAN SHIVER hyoctane23's Avatar
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    I had a pretty good weekend with the ski. I spent all day Friday tuning the carbs and was able to tear it up around some buoys on Saturday. She's about 90% there...only pulling ~8020 rpm so she needs about another 130 rpm more and should get that with some more tuning.


  7. #17
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    Awesome build! Don't worry about what the top rpms are...get the top end rpms to be around where the engine makes the most horsepower. Hopefully the engine guys you worked with can give you an idea of where that is. Get your timing dialed in where you want it and then bend the prop to get you at that max hp rpm...even if it means being down in the 7k's. Higher rpms doesn't necessarily equate to a max/higher speed.


  8. #18
    I'D RATHER SWEAT THAN SHIVER hyoctane23's Avatar
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    Quote Originally Posted by 32DegH2O View Post
    Awesome build! Don't worry about what the top rpms are...get the top end rpms to be around where the engine makes the most horsepower. Hopefully the engine guys you worked with can give you an idea of where that is. Get your timing dialed in where you want it and then bend the prop to get you at that max hp rpm...even if it means being down in the 7k's. Higher rpms doesn't necessarily equate to a max/higher speed.
    Thank you! It has honestly been a lot of fun getting this project together and actually executing it and learning a whole lot along the way. Dave DeLaughter ported the cylinders according to the actual Hot Seat pipe specs, which I believe top out at about 8100-8150 rpm or so. I want to keep the rpms up a little bit so the motor can stay in the power band in the corners. I'm a bit bigger than most 785 racers / riders (230 lbs.) so I need the revs to stay up and not get dragged down too much.

  9. #19
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    Quote Originally Posted by hyoctane23 View Post
    Thank you! It has honestly been a lot of fun getting this project together and actually executing it and learning a whole lot along the way. Dave DeLaughter ported the cylinders according to the actual Hot Seat pipe specs, which I believe top out at about 8100-8150 rpm or so. I want to keep the rpms up a little bit so the motor can stay in the power band in the corners. I'm a bit bigger than most 785 racers / riders (230 lbs.) so I need the revs to stay up and not get dragged down too much.
    Understood and I see where you are coming from. I was surprised to see the hp up at those rev. numbers but that's a 785 for ya. Loved all the meticulous OCD stuff you did...I'm the same way! I bet that thing just pulls from start to top end...would be a lot of fun to ride!

  10. #20
    I'D RATHER SWEAT THAN SHIVER hyoctane23's Avatar
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    I've already got another upgrade for this ski. I rode it last weekend and boy do these Novis hit hard and pull very nicely all the way through the rpm range. I'm still tuning them but was getting 8020 rpm or so before rain hit the lake and I was unable to continue. I'll be out there again this Friday to nail them down before the races on the 4th of July!
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