BD250-7 Rear Sprocket

aZ3R0n · 06-16-2023, 10:07 AM

I'm in a bit of a bind.

I've owned my bike for about a year. Love it, put a lot of miles on it, so naturally it's time to replace the sprocket and chain. Chain size was easy enough to figure out, but the sprocket not so much. Did some measuring and found an equivalent from JT Sprockets and ordered it from Amazon: https://www.amazon.com/dp/B0068O2W8U (JT Sprockets link http://www.jtsprockets.com/catalogue/part/JTR486)

Took the bike and the replacment sprocket to the mechanic. Few hours later, I get a call from him and he says the inner diameter of the sprocket is about 1/8 inch too big (maybe about 3 or 4 millimeters) and so it's not going to fit. Problem? We were so sure it was going to work, and in order to get the old sprocket off he had to beat it up pretty hard. I'm basically without a motorcycle until I find a replacement sprocket.

I've been scouring the JT Sprockets website to see if I can find one with a slightly smaller inner diameter and pitch circle diameter (distance from bolt hole to bolt hole), but so far no luck. I've reached out to the manufacturer, and so far they have been no help.

Does anyone know a sprocket that will match?

06-16-2023, 10:07 AM	#1
aZ3R0n Join Date: Jun 2023 Posts: 9	BD250-7 Rear Sprocket I'm in a bit of a bind. I've owned my bike for about a year. Love it, put a lot of miles on it, so naturally it's time to replace the sprocket and chain. Chain size was easy enough to figure out, but the sprocket not so much. Did some measuring and found an equivalent from JT Sprockets and ordered it from Amazon: https://www.amazon.com/dp/B0068O2W8U (JT Sprockets link http://www.jtsprockets.com/catalogue/part/JTR486) Took the bike and the replacment sprocket to the mechanic. Few hours later, I get a call from him and he says the inner diameter of the sprocket is about 1/8 inch too big (maybe about 3 or 4 millimeters) and so it's not going to fit. Problem? We were so sure it was going to work, and in order to get the old sprocket off he had to beat it up pretty hard. I'm basically without a motorcycle until I find a replacement sprocket. I've been scouring the JT Sprockets website to see if I can find one with a slightly smaller inner diameter and pitch circle diameter (distance from bolt hole to bolt hole), but so far no luck. I've reached out to the manufacturer, and so far they have been no help. Does anyone know a sprocket that will match?
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