520 front sprockets

[Guest]

So, it seems that my sidecar motor has a 16T 520 front sprocket. Yes, a 520 front sprocket. It appears that the current sprocket was a 530 that was ground down.

The rear sprocket is a 46T that fits a "Buell HD XB9R XB12R 520 Conv, 1125R 827A-46"

Does anyone know if of anyone that makes 520 sprocket for a 1980 GS750? I'd rather do this than buy a new chain and rear sprocket.

Or, does anyone know how to find what other bikes use the Buell bolt pattern?

[Agemax]

so are you after a new front sprocket or the rear? you aren't clear in your post.....

[Kyler]

sorry - a new front sprocket. The rear sprocket is a vortex 827a-46 520 sprocket for a 1995-2002 Buell HD XB9R XB12R 1125R 520 conversion.

Option 1 is get a 520 front sprocket. I have a 17T and 18T 530 front sprocket that I bought in error.

Option 2 is get a new 530 chain and a new 530 rear sprocket.

[Agemax]

cheapest option would be to get a 520 front sprocket.
was 520 fitted for a reason, like clearance issues?

[Kyler]

did a quick search on the JT Sprockets P/N JTF513.17 sprocket I got from Z1 and discovered what other bikes use that sprocket. Did a quick cross search and a JTF512 is the right 520 front sprocket. {phew}

[stetracer]

So, it seems that my sidecar motor has a 16T 520 front sprocket. Yes, a 520 front sprocket. It appears that the current sprocket was a 530 that was ground down.

If it ground down the counter shaft sprocket then your chain is wasted also and will soon destroy your rear and new countershaft sprockets as well so be ready to buy some new sprockets and a new chain soon. They will not last very much longer.

[Kyler]

If it ground down the counter shaft sprocket then your chain is wasted also and will soon destroy your rear and new countershaft sprockets as well so be ready to buy some new sprockets and a new chain soon. They will not last very much longer.

not quite. The rear sprocket is a vortex 827a-46 520 sprocket for Buell. I wanted to go to a 17T front and that is when I discovered all the other modifications.

I'm going to get a JT Sprockets JTF512.17 front sprocket and all will be well.

[Kyler]

In case anyone is interested, to use 520 sprockets you need:

JT Sprockets JTF512 series front sprockets and two (2) 1.25mm washers. Z-1 sells the spacers (p/n SS-3) and will special order the sprockets.

The JT Sprockets 512 sprockets don't have the lip on the outside that the stock sprockets have. To have the identical spacing, etc you need one washer on the inside and one on the outside.