Boy Go Fast (BGF) Sprocket Misalignment

HI,

In looking at the pics, it seems as though the plates overlap.

Even if you elongated the holes, the plates seem to still overlap and that could cause problems (Of course the plates could be cut but that's a whole lot of extra time).

If it were me, I would try contacting the seller and have them look at the pics you posted...Maybe that can help you out.

Just my 2 cents

Hope this helps.

Andrew

PS - Just thinking about it BUT there are 2 different 9 hole patterns out there...A small bcd 9 hole and a larger BCD 9 hole pattern....I think maybe you got the large BCD mounting plates and a small BCD sprocket (that would explain the plates overlapping and the holes not lining up...I believe the large BCD pattern uses 8 mm bolt holes and the smaller patter uses 6 mm bolt holes...in either event I think the plates are not correct for the sprocket and the simple "fix" may be to ask for the proper mounting plates

those plates are not made to align flat. they are made to be used on the other side of the rag, and pushed apart until they align. thats why they are called locking plates. because when the rag stretches as you push them apart and tighten the nuts, they lock into place.

I assembled the bracing plates to the sprocket as you show them in your photo. Now take a fine black magic marker, scribe along these excess-metal points, and if you have a pair, take aviation snips and cut along these scribe-lines, taking off one metal-strip per plate. All has fit together fine for me, the sprocket is "level balanced" and I drove the bike FAR. I mean FAR. "I can see for mile and miles." If you want to get technical, cut a 45/45 joint per each two plates. Rather than a one-plate straight-cut. But the same amount of metal must be removed. Good luck.

Here's a tutorial on how to install the sprocket:
http://www.chrishill.myknet.org/Sprocket installation.htm

As what bigbutterbean stated, the locking plates don't lay flat on the spokes, they will be slightly concave, taking the shape of the wheel spokes.

I would recommend that you try to install them and see how it goes before you cut the locking plates.

Good Luck,

Chris
AKA: BigBlue

I trim them all and make the holes bigger.

mine wasnt BGF but they aligned perfectly.
i had two sets of plates,one had 4 and 5 holes,other set had 3 each.
both laid flat on the sprocket and worked fine.