So from what I am understanding there are two mast for the Megabyte, on for the original rig MK1 and one for the fully battened sail MKII which has more flex. Do you know what upper section you were using?I never sailed the boat in big breeze either. The mast builder took pity on my situation and sold me another top section with a beefed up laminate. Have only used it once since - frankly, I'm just gun-shy at this point.
John D, yes - the mast broke in the same location - geographically and physically. As in, all 3 let go while sailing up the Ala Wai and all 3 broke about 4 feet down from the tip. The coincidence of the break is uncanny.
But I do agree - when intact it is a very comfortable and fun-sailing boat.
As for your mast, contact Forte Spars... that is who was making them for Zim They'll make a 1 piece mast with the luff track, but you'll need to do everything else. Zim has a few upper sections still in stock @ 50% off...Hi all - bought a Megabyte last year and it's amazing. Sad that Zim has stopped supporting it. Anybody know where I can buy a replacement Halyard Sheave? I can't find a perfect match from Ronstan, Allen Brothers and a few other places. I have no idea who made the original sheave. Seems to be about 32mm OD, 7mm wide, and the halyard wire is 3/32" I believe. This is for an MKII rig. Bonus question - anybody know where you can buy a replacement mast when this one breaks, or where one can be made (who made the original?) Thank you all, and if I posted this wrong apologies in advance.
Handsome boat, for sure.Ventucky Red - Thank you for the quick reply and leads. I ended up ordering a bunch of aluminum, delrin and acetal sheaves from Harken, Ronstad, Allen Bros, Z-Spar, and random ones from RigRite. The one that fit the best was the Allen Brothers A84, an aluminum sheave. It is 28mm outside diameter so slightly smaller than the cheapo plastic sheave it's replacing. It is 8mm wide which fit perfectly, and has a 9mm bore. The machine screw pin/axle is a 10-24 screw so about 3/16" diameter. I was able to find a 5/16" to 10 aluminum spacer, 1/4" long, at True Value, which worked perfectly.
The runner up sheaves were a Harken 303 and a Z-1610 from RigRite. I actually think the best sheave would be a K-8396A4-5 sheave at RigRite, 1.25" O.D., 1/4" wide, 5/16" bore, but it seems to be out of stock.
See attached photo of the A84 sheave with the spacer in it, next to the old hacked up plastic sheave. Plus a picture of my MKII in action with my son.
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Can you post a photo?Joined today to have a place where MegaByte stuff gets discussed - since it looks like Zim took down the prior MB class pages. As far as I know I'm the only MB sailor in Alaska - we could use more MB's up here! I'm pretty new to sailing and the MegaByte is my first boat ever, although I've had it for a few years now and it seems like a great boat. Question for the group - I've got the MKI rig, and even after studying the rigging guides posted by Leszak Vincent, I am not quite sure that I'm rigging the vang/cunningham right. Whenever the main is moved outboard the vang runs into the cunningham lines on the same side of the boat and put tension on them. Currently, I run the cunningham hook up to the sail on the starboard side of the mast, with the block and hook just inboard of the starboard vang control line at the deck. It seems that regardless of how I run the cunningham hook up to the sail, the vang lines will run into and tension the cunningham as the boom moves from one side of the boat to the other. Is there a solution to this? (A diagram would be super!) Sorry if this is a dumb question!