06 Ninja 250 considering 15t sprocket. Thoughts?

Nu2Street · August 9th, 2016, 04:24 PM

I have an 06 250 that runs strong now that I made my 650 mi. Trip, many miles at 80mph+ cleaned the carbs nicely. I ride the interstate- short trips occasionally- it's a light 300lb bike, 80mph = 10,000 rpm. It seems many people are getting better highway rpms by changing front sprocket gear from 14 to 15 tooth. I'm 150 lbs, so I dont think I'll be boging the bike down on takeoffs if I make the change. First will take longer to wind out and give more speed before shifting.
Looks like I would have to remove the gear shift linkage from the cover plate during the diassembly. Does that sound right?
Any thoughts or tips are appreciated.
I'd like an 09 ZX6R? BUT that won't happen on my budget so I'll have to live with the 250 for a WHILE.

csmith12 · August 9th, 2016, 04:31 PM

Hi Karl,

Your assumptions are pretty spot on. Linkage, cover plate and the likes to replace the sprocket and should calm things down just a small bit on the highway.

Good luck!

JohnnyBravo · August 9th, 2016, 04:33 PM

Check out the favorite sprocket mod thread... I tried to link it, but new phone n all

Motofool · August 9th, 2016, 04:54 PM

Quote:

Originally Posted by Nu2Street

........
Any thoughts or tips are appreciated.
.......

http://faq.ninja250.org/wiki/I_want_...nge_my_gearing

http://faq.ninja250.org/speed/#noredir

Nu2Street · August 9th, 2016, 04:55 PM

I read part of that thread for my research. I know I can't turn my 250 into a 600, just trying to do an inexpensive mod to improve high speed performance some. Looks like I'll be able to lower the rpms at 80mpH by at least 700? If I can wind 4th and 5th out more for passing at 60mph that would be great also.

Triple Jim · August 9th, 2016, 05:41 PM

I got my '05 250 last summer. This spring I put on a new chain that came with the bike when I bought it. I assumed I had the stock 14 on the front, and was going to put the new 14 on it that came in the kit, but when I took off the old one, I realized it's a 15.

All this time I marveled at how low 1st gear was, letting me idle in gear at walking speed, and that was with the 15. I can't imagine any advantage of a 14, other than being slightly quicker off the line. I'm considering going down a few on the rear if that sprocket ever needs replacement. In any case, one tooth on the front isn't a major change.

Nu2Street · August 9th, 2016, 06:19 PM

Thanks triple jim. Do you think the 15t sprocket was stock, or dI'd someone change it and just bought an extra chain?

verboten1 · August 9th, 2016, 06:43 PM

I switched my 08 to a 15 tooth and it was darn near perfect.

Snake · August 9th, 2016, 06:47 PM

I'm running a 15 on the front and my highway rides are better for it.

Nu2Street · August 9th, 2016, 07:23 PM

Where did evertone get the 15t sprocket?

Triple Jim · August 9th, 2016, 07:44 PM

Quote:

Originally Posted by Nu2Street

Thanks triple jim. Do you think the 15t sprocket was stock, or dI'd someone change it and just bought an extra chain?

I'm sure a previous owner changed it. I'm at least the third owner.

I normally get JT brand front sprockets. They're good quality and inexpensive. I think the last JT I got was through Amazon. You can go to jtsprockets.com and get the part number, then search for the best price with that number.

Edit: I just went to their site, and it looks like a JTF516.15, but check me to be sure.

dangerous340 · August 9th, 2016, 09:26 PM

I put off this mod being afraid of not being able to get going, I push the load capacity of this bike without carrying anything with me. I finally decided to go with it when deep cleaning my bike. By the time I hit the road I'd all but forgotten I swapped. Then I noticed my bike was much less noisy. The stock sprocket was worn weird and this help a lot. It gets moving fine and the highway is no problem. Wish I'd done it last year when I bought it. Mpg might be better too, not sure though as my riding is never consistant enough for a whole tank.

JohnnyBravo · August 10th, 2016, 08:30 AM

I don't think I've ever used a full tank in one ride, I may be mistaken though

one of these days I will

August 9th, 2016, 04:24 PM	#1
Nu2Street ninjette.org member Name: Karl Location: Western PA Join Date: Dec 2015 Motorcycle(s): 2006 Ninja 250R Posts: 85	06 Ninja 250 considering 15t sprocket. Thoughts? I have an 06 250 that runs strong now that I made my 650 mi. Trip, many miles at 80mph+ cleaned the carbs nicely. I ride the interstate- short trips occasionally- it's a light 300lb bike, 80mph = 10,000 rpm. It seems many people are getting better highway rpms by changing front sprocket gear from 14 to 15 tooth. I'm 150 lbs, so I dont think I'll be boging the bike down on takeoffs if I make the change. First will take longer to wind out and give more speed before shifting. Looks like I would have to remove the gear shift linkage from the cover plate during the diassembly. Does that sound right? Any thoughts or tips are appreciated. I'd like an 09 ZX6R? BUT that won't happen on my budget so I'll have to live with the 250 for a WHILE.

August 9th, 2016, 04:31 PM	#2
csmith12 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	Hi Karl, Your assumptions are pretty spot on. Linkage, cover plate and the likes to replace the sprocket and should calm things down just a small bit on the highway. Good luck! __________________________________________________ Goal: Shake A Million Hands \| Look through the corners \| Track Day Prep \| Closest track? \| The Mid-Ohio School

August 9th, 2016, 04:33 PM	#3
JohnnyBravo Certifiable nontundrum Name: Harper Location: NC Milkshake stand Join Date: Mar 2013 Motorcycle(s): 2013 SE NINJA 300 Posts: Too much. MOTM - Sep '13, Sep '16	Check out the favorite sprocket mod thread... I tried to link it, but new phone n all __________________________________________________

August 9th, 2016, 06:43 PM	#8
verboten1 ninjette.org certified postwhore Name: Jason Location: Monroe, MI Join Date: May 2013 Motorcycle(s): '75 CB550:.'82 XV920:.'00 KLR650:.'00 EX250:.'08 Ninja 250 Posts: A lot. MOTM - June '15	I switched my 08 to a 15 tooth and it was darn near perfect. __________________________________________________ '82 XV920: Soon to be tracker--'00 KLR685:adv --'04 DRZ400E--'12 Super Tenere --'13 Versys Ride more, worry less.

August 9th, 2016, 09:26 PM	#12
dangerous340 ninjette.org newbie Name: David Location: Mason, Mi Join Date: May 2015 Motorcycle(s): 95 Ninja 250 and a 85 ZL900 Eliminator Posts: 3	I put off this mod being afraid of not being able to get going, I push the load capacity of this bike without carrying anything with me. I finally decided to go with it when deep cleaning my bike. By the time I hit the road I'd all but forgotten I swapped. Then I noticed my bike was much less noisy. The stock sprocket was worn weird and this help a lot. It gets moving fine and the highway is no problem. Wish I'd done it last year when I bought it. Mpg might be better too, not sure though as my riding is never consistant enough for a whole tank.
	1 out of 1 members found this post helpful.

August 9th, 2016, 04:55 PM	#5
Nu2Street ninjette.org member Name: Karl Location: Western PA Join Date: Dec 2015 Motorcycle(s): 2006 Ninja 250R Posts: 85	I read part of that thread for my research. I know I can't turn my 250 into a 600, just trying to do an inexpensive mod to improve high speed performance some. Looks like I'll be able to lower the rpms at 80mpH by at least 700? If I can wind 4th and 5th out more for passing at 60mph that would be great also.

August 9th, 2016, 05:41 PM	#6
Triple Jim 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	I got my '05 250 last summer. This spring I put on a new chain that came with the bike when I bought it. I assumed I had the stock 14 on the front, and was going to put the new 14 on it that came in the kit, but when I took off the old one, I realized it's a 15. All this time I marveled at how low 1st gear was, letting me idle in gear at walking speed, and that was with the 15. I can't imagine any advantage of a 14, other than being slightly quicker off the line. I'm considering going down a few on the rear if that sprocket ever needs replacement. In any case, one tooth on the front isn't a major change.

August 9th, 2016, 06:19 PM	#7
Nu2Street ninjette.org member Name: Karl Location: Western PA Join Date: Dec 2015 Motorcycle(s): 2006 Ninja 250R Posts: 85	Thanks triple jim. Do you think the 15t sprocket was stock, or dI'd someone change it and just bought an extra chain?

August 9th, 2016, 06:47 PM	#9
Snake ninjette.org certified postwhore Name: Rick Location: Alexandria, Louisiana Join Date: Jan 2009 Motorcycle(s): 05 Blue Ninja 250 Posts: Too much. MOTY - 2017, MOTM - Jan '19, Oct '16, May '14	I'm running a 15 on the front and my highway rides are better for it.

August 9th, 2016, 07:23 PM	#10
Nu2Street ninjette.org member Name: Karl Location: Western PA Join Date: Dec 2015 Motorcycle(s): 2006 Ninja 250R Posts: 85	Where did evertone get the 15t sprocket?

August 10th, 2016, 08:30 AM	#13
JohnnyBravo Certifiable nontundrum Name: Harper Location: NC Milkshake stand Join Date: Mar 2013 Motorcycle(s): 2013 SE NINJA 300 Posts: Too much. MOTM - Sep '13, Sep '16	I don't think I've ever used a full tank in one ride, I may be mistaken though one of these days I will __________________________________________________

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