Unifoil fuse compatibility (1 vs 2 bolt)

Foils and Boards - Gear Talk
1

I’ve been finding mixed information so hoping someone with real experience can confirm either of the following.

  1. Do the newer hyper2/prog 2 bolt wings fit on the older 1-bolt fuses?

  2. Do the 1-bolt Vypers fit on the newer 2 bolt fuses?

Thanks

2

Yes, but you may need to sand off the female side to get it to line up

Older 1- bolt vyper with newer masts can be an issue.

3

I have a decent number of sessions on a 1 bolt 150 Vyper using the 2 bolt fuse from my Progression wings. No issues so far.

I’m mainly kite foiling on the 150 Vyper.

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4

Thanks, seems like #2 is possible.
Anyone tried #1, new hyper2 or progression on a 1-bolt fuse?

The uni website says “If you already on our system your 1 bolt fuse might fit the new 2 bolt wings (Hyper2 and Progression)” but i’d love to hear real experience of this.

5

#1 works OK for me. I put masking tape on the base of the old fuse to get a tighter fit.

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I would not sand down the female wing side of the connection as that would create a gap when using other combos. Id rather sand the male fuse side to get the holes to line up.
Matt, what issues have you had with Vyper on newer mast?

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6

It was just less effort to sand, was about 1mm, barely noticeable, but yeah either or. Sanding the old 190 was the idea as I didn’t know if I’d even use it much, I didn’t.

The issue was bad fuse/mast tolerances, I couldn’t link more than 2 or 3 waves on the vyper 190 where i was having no trouble linking 5-10 on progression. Put it down to wonk on the connection as pumping was a pain - short clip, if the pump was very neat then fine, but if any wonk to the pump it was super hard to recover… discussed further here

7

Following up on that topic,
For a while I was using a Vyper170 with a one bolt fuse. That fuse fits well on my new Progression 125, and I’m wondering if it would make sense to drill the fuse and put a helicoil to turn it into a 2 bolt fuse.
I don’t think there is any slop as it is with just one bolt, but maybe 2 bolts would be more secure?

8

Totally, for sure someone has already done this

9

If it fits well, don’t. You just weaken the fuse and single bolt is enough hold a fuse that seats well.

I tried to drill one of mine. It was a f@#$%up. There’s no flat surfaces to clamp it down without risking damaging the fuse. Halfway in i hit metal and broke two drill bits. Eventually got through and ended with a large scew hole in a perfectly good fuse.

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10

Thanks for the warning! I’ll stick with that single bolt