| Use an angle grinder to take a couple of rivet heads off the chain and then take a link out - this is 20 seconds work and much easier than a breaking tool! You can get a chain rivetting tool for about 50 quid if you shop around. It'll probably cost you that to have a chain fitted at a dealer.
Yes, standard is 520 x 94 for 14/38 for the 748.
If you go any higher at the rear you'll need 96 links - not much difference in price to worry about though, but important to remember otherwise the chain adjusted will be in the wrong position on the eccentric cam. This messes up the rideheight and hence handling is affected.
You probably won't see a benefit from a carrier unless you change sprockets too. A carrier is between 80-120 quid depending on make then sprockets around 25 quid each. Obviously it makes sense if you want lots of different size sprockets for trackdays, etc. | 
antonye
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