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Hi all, just added a +2 rear sprocket on my 749 (41 teeth, up from 39). When I went to replace the rear wheel, there was less chain slack due to the extra teeth and I couldn't line up the axel, so I had to move the chain tensioner collars forward significantly.

I've read in other posts that usually you don't need to add links to your chain if you're only going +2. I checked the chain tension and I have about 31mm of play at the mid point. I guess my question is: Does moving the rear wheel forward to accomodate the new sprocket affect the wheelbase/ handling of the bike overall?

New Sprocket


Chain Tensioner setting


Chain Slack- looks ok
 

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Yes, pushing the rear wheel fwd to fit the larger sprocket will make the bike's wheel base slightly shorter. Meaning the bike will turn a half a hair faster. In reality 99% of us will not really notice the difference. As long as you can get the 30-35mm of slack in the chain you'll be alright. I just did a 520 conversion to a 43T rear and kept the front at 14T. Much better pickup and 6th gear is usable now with only a speeding ticket rate of speed vice jail rate of speed. Good mod.
 
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