Search results

I’m really trying to stay out of the Drama. TPE can do their thing. We can do ours. No hard feelings. TPE makes a good motor and so does JSN. Back story is simple. The cylinder comes from a company called CPI. TPE previously had exclusivity agreement to buy the cylinders and that expired. Opened...

You don’t need a degree wheel you just need to know the piston stick out and exhaust port height. From there you can calculate the exhaust duration. You know the stroke and rod length

Nice looking part. Been playing around with casting a manifold as well. Curious if you changed the runner size, length or layout at all vs a power factor ?

If you can’t get an answer, you might want to just mock it up and start measuring the port timing. You’ll probably be shooting for 195-198 exhaust duration maybe a little higher (guessing - I’ve never measured an ET). Another method is if you have the correct domes for the setup and know target...

You are right, the wiseco pistons we stock at JSN all have the same skirt length. If anyone wants them precut for a 964, I’m happy to do that. Depending on the original builder, the skirt length can vary so I personally prefer to leave them long so people can match what they already have. If...

just don’t get it on the raw aluminum

That might just be some piston transfer. I can help you figure that out if you want. Top end parts in stock. Can help with plating and rebuild if you want or help you do it yourself. Paul is also great to work with. No pressure either way.

Looks good! +1 on fixing the epoxy and drilling the returns. Use JB weld tank weld. I drilled the returns just so they’d stop getting clogged. Mike, are you actually going to run that battery? Are you going charging system?

Wow what a build! Nice job! When will we see it on the water?

I may take you up on that. I’ve missed a couple good deals on land and sea dynos in the past year but I’ll probably pull the trigger on one if it pops up

JSN1105 will be $7999 normal price on sale for $6999 through cyber Monday. Will come fully ported. No extra porting options (they will all make the most power possible). Haven’t had a chance to get them on the site but message me or a dealer if interested!

Honestly, if what we’ve done here does nothing more than drive the competitors prices down to reality, mission accomplished. This is ultimately a hobby for all of us. I’d rather make less money but get more people on top performing skis. That’s what will ultimately grow the sport. Having Absurd...

Fair point about the power claim. I will say, I personally own a Torrent built comp ported 1200 so I’ve done back to back testing. A dyno Is likely in the future for me but I doubt if it’s really an effective tool to improve these engines. It’s hard to simulate the way the motors are loaded in...

Affordable Power is Here! Hey Friends, You may have seen this news on social media, but I wanted to take a minute and officially announce the JSN lineup of engines and parts here on the X. In partnership with Tony from TigerCraft, we've built a series of engine packages and components that...

Sorry missed the post about you wanting a lake ski. Ya I’d stick with a JM motor for now.

John’s motors are in the first batch so if you want a great deal on shipping and an earlier delivery, this is the way to go!

781 is a fantastic motor. I learned to flip on a 781 and it’s a great way to force good technique. A 964 will make a good bit more power but it will also be a little bit of a crutch if you want to do flat water stuff. (This is coming from the guy selling the 964s btw lol) Not sure what type of...

Heres one that is boxed and ready to go for John! Immediate shipment available!

Buttoning these up right now! Smoking deal for a 964!

You pretty much nailed it! Really appreciate the kind words guys! Planning to put a post up on the X this week announcing it and I’ll touch on the back story as well.