June 24th, 2012, 06:38 PM | #1 |
Fighting Texas Aggie '05
Name: Neil
Location: Hutto, TX
Join Date: Feb 2009 Motorcycle(s): '07 ZX6R, '08 Versys, '09 250R Track, '93 F2/F3 Track Posts: A lot.
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front vs rear sprocket change
So after putting pods/jet/exhaust on the bike and around 1K miles on (not just 1k experience I have more bikes lol) I really think that the bike is geared too short. With rearsets and clip ons (no bar weights) it vibrates the heck out of my hands and feet running at 65-75 mph on highway.
I do not want to loose any acceleration on the bike so I have been really weary of gearing he bike longer but have read that alot of people are really happy with the 15T front upgrade. Now assuming I won't notice any appreciable loss in acceleration, is there any reason to do the 15T vs a 42T rear other than cost? I know that with a 42T rear the wear cycle is greater because the chain will contact the same tooth in less revolutions but I imagine it negligable. Adding a tooth the front sprocket will increase weight, removing 3 teeth from the rear reduces weight. I also know that this is an insignificant amount but I road cycle a bit so upgrades always get scanned through the weight weenie thought process. What say you ninjette? Last futzed with by sharky nrk; June 24th, 2012 at 06:39 PM. Reason: spelling |
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June 24th, 2012, 06:41 PM | #2 |
ninjette.org dude
Name: 1 guess :-)
Location: SF Bay Area
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No appreciable difference. Cheaper to do the front one. Easier to do the rear one. Either way, the only thing that ultimately matters is the new ratio.
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June 24th, 2012, 08:16 PM | #3 |
Fighting Texas Aggie '05
Name: Neil
Location: Hutto, TX
Join Date: Feb 2009 Motorcycle(s): '07 ZX6R, '08 Versys, '09 250R Track, '93 F2/F3 Track Posts: A lot.
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gearing calc showed about a 1/2 inch increase in sprocket distance from the rear reduction, is there enough adjustment to cover that with the stock chain or would you have to yank a link?
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June 24th, 2012, 08:25 PM | #4 |
ninjette.org dude
Name: 1 guess :-)
Location: SF Bay Area
Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much.
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Not sure. If it was a new unstretched chain, it would probably be fine. If the chain adjusters are already out a bit, perhaps it wouldn't leave enough adjustment room left. I know that people have done the 15/41 ratio on the stock chain.
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June 24th, 2012, 08:38 PM | #5 |
ninjette.org sage
Name: Byron
Location: Reno, NV
Join Date: Dec 2011 Motorcycle(s): Ninja ex250 1990 Posts: 761
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for me the front was easiest, can still use the same chain with hardly any adjustment and cheaper too. Think front sprocket is like 12bucks shipped.
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1990 250F. ex300 motor swap, 15/42 gearing, flush side markers, newgen intergrated front fairing, rear integrated turn signals, DB Touring Bubble, zx600 rear shock, Custom DanMoto Exhaust |
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June 24th, 2012, 08:44 PM | #6 |
Fighting Texas Aggie '05
Name: Neil
Location: Hutto, TX
Join Date: Feb 2009 Motorcycle(s): '07 ZX6R, '08 Versys, '09 250R Track, '93 F2/F3 Track Posts: A lot.
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I have no fears of being able to do either sprocket swap, but all things being equal I would prefer to do the rear rather than the front, but it would be nice to not have to futz with the chain length. If not I can snatch a link off of it.
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June 24th, 2012, 08:47 PM | #7 |
ninjette.org sage
Name: Byron
Location: Reno, NV
Join Date: Dec 2011 Motorcycle(s): Ninja ex250 1990 Posts: 761
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well if thats the case with 15 front and 42 rear in my set up i had to take off two links ( 106 stock to 104 length). So it might be more since your not going to raise the front. keep that in mind. Might have to take out two links.
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1990 250F. ex300 motor swap, 15/42 gearing, flush side markers, newgen intergrated front fairing, rear integrated turn signals, DB Touring Bubble, zx600 rear shock, Custom DanMoto Exhaust |
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June 24th, 2012, 09:01 PM | #8 |
ninjette.org certified postwhore
Name: eddie
Location: Lawnguylind
Join Date: Nov 2009 Motorcycle(s): 300, WeeStrom Posts: A lot.
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I did both for touring purposes:
Loos of accel was not an issue Gas milegae dropped a little Top end came off just a little Could not rredline in 6 But cruised very easily @ 80....if i recall, maybe just under 9k. Just got a new '11 ninjette and will do it again....very worthwhile for highway |
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June 25th, 2012, 03:32 AM | #9 |
Fighting Texas Aggie '05
Name: Neil
Location: Hutto, TX
Join Date: Feb 2009 Motorcycle(s): '07 ZX6R, '08 Versys, '09 250R Track, '93 F2/F3 Track Posts: A lot.
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Yeah, I can see on a completely stock bike how it would be difficultto pull the bike to redline with longer gearing. Stock the bike just goes so flat past 10-11K. With normal E/P/J it does give the bike a little longer legs and I bet I could get close to using all available gearing with a small step.
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