May 23rd, 2017, 12:10 PM | #1 |
ninjette.org member
Name: Craig
Location: San Luis Obispo, CA
Join Date: Jul 2016 Motorcycle(s): 2014 Ninja 300 ABS, 2007 Yamaha FZ6 Posts: 210
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15/42 sprockets on pre-gen Ninja 250
I've been using a 15/45 combination for about month and haven't really noticed a huge difference from the stock setup, so I ended up getting a 42 rear to see how that would do.
First of all, first gear is waaaaaaaay more useful with 15/42 compared to 15/45. I was usually almost always shifting into second going down my street, but I can now stay in first as long as I'm ok with the rpms being just a tad higher. Secondly, I haven't noticed a huge difference in acceleration. I've heard many riders say that quick acceleration suffers when you go to a 15/42 setup, but I just haven't really noticed that. Granted, I only weigh 150 lbs, but I'm glad that this new setup doesn't completely bog down the throttle trying to get up to speed -- at least for me. Thirdly (and the biggest reason I wanted a 15/42 combo), RPMs are lower at higher speeds. I haven't thoroughly tested this since I didn't get on the freeway or anything, but it was around 7,000rpms at 65mph and around 5,500rpms at 50mph. I wouldn't mind even lower RPMs than that, so I'm almost tempted to try a 15/41 setup, but not sure if that would even make a bigger difference or not. In any case, I'm really happy with 15/42. On an unrelated note, I'm still missing shifts sometimes in 3rd and 4th gears. mostly during hard acceleration. I make sure to apply deliberate pressure to the shift lever, but for some reason it sometimes just doesn't "click" into gear and I have to give it another try (sometimes even another try after that). I have the FactoryPro spring that I'm going to try out and see if that helps, but I've heard that it makes the lever a bitch to shift. We shall see! |
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May 23rd, 2017, 02:36 PM | #2 |
Motorcycle Hypermiler
Name: Vic
Location: Livermore CA
Join Date: Jan 2012 Motorcycle(s): 1999 & 2005 Kawasaki Ninja 250R's Posts: A lot.
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Hi, I run 15/37 on my nonradical moto and 15/33 on my fully streamlined moto. The 15/37 combo works well and is about as tall as one can use without giving up a lot acceleration and ease of uphill starting from a dead stop. The 15/33 combo works OK only with the benefit of the streamlined bodywork and can be challenging for uphill starts. The taller gearing brings down the rpm at 70mph to 7000 for the 15/37 and 6500 for the 15/33. This helps a lot with fuel economy and comfort on the freeway.
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235 MPG Hypermotorcycling to a better tomorrow |
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May 23rd, 2017, 02:41 PM | #3 | |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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Quote:
1. put bike in neutral and push it around 2. shift into 1st-gear, then squeeze clutch-lever and push Is there any extra drag in case#2? If so, the clutch is dragging and messing up your shifts. Adjust lever for extra throw or tighten the cable (unscrew adjuster). |
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June 8th, 2017, 02:20 AM | #4 | |
ninjette.org certified postwhore
Name: Ant
Location: Wooster
Join Date: Dec 2013 Motorcycle(s): Ducati 999 2012 Ninja 250r Ducati748 Yellow finally running 2003 SV650 S (SOLD) Posts: A lot.
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Quote:
Good luck and post up with what you find! Ducati999 |
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June 8th, 2017, 07:40 AM | #5 |
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.
Blog Entries: 7
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/moved to pre-gen tech
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Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered) |
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June 8th, 2017, 11:52 AM | #6 |
in your machine
Name: Scott
Location: Summer Shade, Ky.
Join Date: Oct 2014 Motorcycle(s): 98 Ninja 250/F12 aka ZX-2R "SERENITY", 91 Ninja 500/A5 aka ZX-5R "Phoenix", 84 Honda GL1200A "SIREN" Posts: A lot.
Blog Entries: 25
MOTM - Jun '17, May '16, Mar '15
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I've been running +1/-2 for years now on my Ninjette, and very happy with it, as I use it mostly for touring and communitting.
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violente et ignorantia ZX-2R BLOG Twitter and Instagram = Ghostt_Scott I'm not here to change your mind, just to inform. |
1 out of 1 members found this post helpful. |
June 8th, 2017, 12:01 PM | #7 |
The Corner Whisperer
Name: Chris (aka Reactor)
Location: Northern KY
Join Date: May 2011 Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much.
MOTY 2015, MOTM - Nov '12, Nov '13
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^^^ Same
imho, this should be the default street gearing for a pregen.
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Goal: Shake A Million Hands | Look through the corners | Track Day Prep | Closest track? | The Mid-Ohio School |
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June 8th, 2017, 12:19 PM | #8 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
MOTM - Oct '18, Aug '17, Aug '16
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I thought it was funny that when I got my pregen I was amazed at the extremely low stock gearing. I could idle in 1st gear at a slow walking speed, and was through 2nd gear before clearing an intersection. Then I replaced the chain and found it had a 15 tooth front sprocket! I can't imagine sticking with the 14, and I have a 42 ready to go on the rear next time I have the wheel off.
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June 8th, 2017, 11:00 PM | #9 |
in your machine
Name: Scott
Location: Summer Shade, Ky.
Join Date: Oct 2014 Motorcycle(s): 98 Ninja 250/F12 aka ZX-2R "SERENITY", 91 Ninja 500/A5 aka ZX-5R "Phoenix", 84 Honda GL1200A "SIREN" Posts: A lot.
Blog Entries: 25
MOTM - Jun '17, May '16, Mar '15
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The only slight downside I've found running +1/-2 is in 6th gear the bike likes to cruise at about 75ish mph, which is about 8k rpm, which is just inside the lower part of the power band.
Local speed limits are 55 mph, so the engine is well below the power band in 6th, which is fine e for just cruising along, but if I need any power I have to downshift to 4th, to get it back in the power band. I don't find this in anyway a bad thing, or an inconvenience, it's just a fact or running the ratio I have chosen do to I mostly use it for commuting on the highway. If I was using in a city, I would stick with the OEM gearing, maybe a bit more as to have the quick response needed in that environment..
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violente et ignorantia ZX-2R BLOG Twitter and Instagram = Ghostt_Scott I'm not here to change your mind, just to inform. |
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June 14th, 2017, 06:31 AM | #10 | |
ninjette.org certified postwhore
Name: Bill
Location: Port Huron, Michigan
Join Date: Mar 2017 Motorcycle(s): 2007 Kawasaki 250 Ninja, 1982 Honda Ascot FT500 Posts: A lot.
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15/42
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Bill |
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June 14th, 2017, 07:10 AM | #11 | |
ninjette.org certified postwhore
Name: Bill
Location: Port Huron, Michigan
Join Date: Mar 2017 Motorcycle(s): 2007 Kawasaki 250 Ninja, 1982 Honda Ascot FT500 Posts: A lot.
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Quote:
Bill |
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June 21st, 2017, 05:54 AM | #14 | |
ninjette.org certified postwhore
Name: Bill
Location: Port Huron, Michigan
Join Date: Mar 2017 Motorcycle(s): 2007 Kawasaki 250 Ninja, 1982 Honda Ascot FT500 Posts: A lot.
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Quote:
Cheers, Bill |
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1 out of 1 members found this post helpful. |
June 21st, 2017, 06:50 AM | #15 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
MOTM - Oct '18, Aug '17, Aug '16
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Thanks Bill. One reason I haven't rushed the change is that my daughter was fairly new to riding. I thought I'd give her a chance to enjoy the extra easy launches from the 15/45 setup for a while. Now that I have the hydraulic clutch actuator installed, she finds launches a lot easier, due to the much better feel of the "friction zone", and I may go ahead with the sprocket change before long. She's also a lot more experienced at riding after almost two years of it.
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June 21st, 2017, 12:30 PM | #16 | |
ninjette.org certified postwhore
Name: Bill
Location: Port Huron, Michigan
Join Date: Mar 2017 Motorcycle(s): 2007 Kawasaki 250 Ninja, 1982 Honda Ascot FT500 Posts: A lot.
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Quote:
Cheers, Bill |
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