Rick448 Posted September 18, 2013 Report Share Posted September 18, 2013 I want to change the gearing on my gsxr750y and was wondering whether to go minus one on the front or plus two on the rear. Any preference as to which is best? Cheers Link to comment Share on other sites More sharing options...
Wallie Posted September 18, 2013 Report Share Posted September 18, 2013 Both. Just done it to the 6R and i've never smiled so much on backroads. Link to comment Share on other sites More sharing options...
Rick448 Posted September 18, 2013 Author Report Share Posted September 18, 2013 I've already got a minus one front to fit but wondered if plus two rear was better. I might try both. I guess i should check gearing commander to see if I'll lose too much top end for track days. Link to comment Share on other sites More sharing options...
porter_jamie Posted September 18, 2013 Report Share Posted September 18, 2013 Minus one plus one and the chain length comes right Link to comment Share on other sites More sharing options...
blow_away Posted September 19, 2013 Report Share Posted September 19, 2013 I have heard that ideally you should not go too small on the gearbox sprocket as it will run the chain in too tight a circumference and potentially damage it. Sounds plausible, but it might be a load of coddswallop. Link to comment Share on other sites More sharing options...
theo Posted September 19, 2013 Report Share Posted September 19, 2013 I have heard that ideally you should not go too small on the gearbox sprocket as it will run the chain in too tight a circumference and potentially damage it. Sounds plausible, but it might be a load of coddswallop. Its more that as you reduce the number of teeth, the circle represented by the sprocket becomes less like a circle and more like a regular convex polygon. Link to comment Share on other sites More sharing options...
toosmooth Posted October 3, 2013 Report Share Posted October 3, 2013 Its more that as you reduce the number of teeth, the circle represented by the sprocket becomes less like a circle and more like a regular convex polygon. Damn, I just patented the 1 tooth front sprocket for mega fast acceleration applications too. Back to the drawing board. Link to comment Share on other sites More sharing options...
ronenige Posted October 6, 2013 Report Share Posted October 6, 2013 I have heard that ideally you should not go too small on the gearbox sprocket as it will run the chain in too tight a circumference and potentially damage it. Sounds plausible, but it might be a load of coddswallop. I was told to not go below 14 teeth 'cos of this ; http://chain-guide.com/basics/2-2-1-chordal-action.html Link to comment Share on other sites More sharing options...
Damnthistinleg Posted October 16, 2013 Report Share Posted October 16, 2013 Went from 17-39 to 16-42 and did a 520 conversion at the same time. It's like someone fitted a supercharger while I wasn't looking. Flat out is now only about 135mph but by god it's 'punchy' out of corners. Link to comment Share on other sites More sharing options...
Rick448 Posted October 16, 2013 Author Report Share Posted October 16, 2013 Went from 17-39 to 16-42 and did a 520 conversion at the same time. It's like someone fitted a supercharger while I wasn't looking. Flat out is now only about 135mph but by god it's 'punchy' out of corners. What bike? Link to comment Share on other sites More sharing options...
Damnthistinleg Posted October 21, 2013 Report Share Posted October 21, 2013 It's a TRX850. Link to comment Share on other sites More sharing options...
Instant Gymnast Posted October 22, 2013 Report Share Posted October 22, 2013 Did the -1,+2 thing to my old ZX8-R and that thing was hilarious! It surprised no end of bikes on A and B roads who mistook it for a rather portly outdated sports tourer. Traffic lights were a hoot too as there was just enough weight over the front to keep it down but not enough that it wouldn't sit up and boogie should the need arise... You know what you must do…... Link to comment Share on other sites More sharing options...
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