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How many chain links?

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I am thinking about re-gearing my bike from the previous owners preferred 13/45, and going to 14/50, maybe 14/52 to get a little more pep for the trails. I ride a 2000 KTM 380 MXC, so it isn't like it is having troubles pulling the gears, it just seems to long in each gear. I can't tell you for sure, but it feels like I am going 20-25 mph before I need to shift into second gear. Any way...I had been looking at replacing the chain at the same time, but I am not sure how many links I will need. When I clicked on the X-ring chain at Rocky Mountain MC it came up with multiple different lengths. I know that I could just order the longest one and break a few links off, and use them as spares, but I don't think I would need more than a few spare links, and the obvious spare master link. Is there a good rule of thumb or a formula to get the correct number and still have the right sag?

Edited by trailrydr9

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I put 14/52 on my excr and iirc I had to buy a 120 link chain and took out two links. Also had to futz and remount the chain guide so it would line up.

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Thanks for the reply. Went riding for the weekend, can't wait to get the gearing right. Sorry this got put into the four stroke section, I had it in general, and it got moved to here. New sprocket and chain is on order, when I entered my bike in with the sprocket combo it recommended 118 links also, (this was the only choice in the drop down menu for size).

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I had to go to a shop for the chain, after my new sprockets arrived it was too short.

I wasn't sure I yours would be the same, at least it worked out. You're putting that on a 2t?

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