Mechanic telling my friend he bought the wrong sprockets

Lil_Green_Demon · November 15th, 2013, 05:24 PM

The reason I'm asking is because I'm the one who recommended these to him for his 2010 Ninja 250R. Now I feel bad.
You can look them up on Amazon.com. Rear sprocket is a JT Sprocket JTR210.43 43T Steel & the front sprocket is JT Sprockets JTF252.14 14T Steel.
The mechanic told my friend that his sprockets, which he order off amazon.com after I told him what sizes I'd go with, are for dirt bikes, so he ordered new sprockets through the dealership.
Can someone tell me if these sprockets are inaccurate? I don't remember which model number I bought of my own JT Sprockets, but I know they were 14T/43T from JT Sprockets.
Someone please chime in. This is the same mechanic who told me my 140/70-17 rear tire wouldn't fit my bike. I think he's incompetent.

menikmati · November 15th, 2013, 05:38 PM

Quote:

Originally Posted by Lil_Green_Demon

The reason I'm asking is because I'm the one who recommended these to him for his 2010 Ninja 250R. Now I feel bad.
You can look them up on Amazon.com. Rear sprocket is a JT Sprocket JTR210.43 43T Steel & the front sprocket is JT Sprockets JTF252.14 14T Steel.
The mechanic told my friend that his sprockets, which he order off amazon.com after I told him what sizes I'd go with, are for dirt bikes, so he ordered new sprockets through the dealership.
Can someone tell me if these sprockets are inaccurate? I don't remember which model number I bought of my own JT Sprockets, but I know they were 14T/43T from JT Sprockets.
Someone please chime in. This is the same mechanic who told me my 140/70-17 rear tire wouldn't fit my bike. I think he's incompetent.

For the 2010 (new-gen) bikes, the front and rear sprockets are as follows, per the JT Sprockets catalogue:

Rear: JTR486

Front: JTF1539

Add the sprocket teeth count after each model number for the full product name.

http://www.jtsprockets.com/catalogue/model/5185

JTR210 page: http://www.jtsprockets.com/catalogue/sprocket/JTR210

When buying parts, always do research at the actual manufacturers website and don't rely solely on the parts finder of a retailer for fitment.

Lil_Green_Demon · November 15th, 2013, 06:53 PM

Lesson learned. Thanks, @menikmati. I will probably buy my friend's sprockets for him. He went off my recommendation, though I didn't tell him the part #'s.

alex.s · November 15th, 2013, 06:58 PM

just hit it hard enough... it should go on

Bones85 · November 15th, 2013, 07:23 PM

Dammit, I think I made the same mistake too with the front sprocket I bought. A lot of the reviewers said they had a Ninja 250 though?

This is the sprocket I bought: http://www.amazon.com/JT-Sprockets-J...pr_product_top

Will it work for a 2009 Ninja 250?

red5 · November 15th, 2013, 07:38 PM

Quote:

Originally Posted by Bones85

Will it work for a 2009 Ninja 250?

Yes. Been running that one since July with no problems.

Bones85 · November 15th, 2013, 07:41 PM

I should've realized this before but the Ninja 250 FAQ says it's for the pregen Ninja 250.

Is it safe to use it with with the newgen and did yours fit without any modifications?

Motofool · November 15th, 2013, 11:52 PM

Quote:

Originally Posted by Lil_Green_Demon

Lesson learned. Thanks, @menikmati. I will probably buy my friend's sprockets for him. He went off my recommendation, though I didn't tell him the part #'s.

Can you simply measure and compare the dimensions before going by the word of the mechanic and buying more sprockets?

If the spline, width, off-center, etc. are like the original ones, I see no problem.

Did the mechanic mentioned what model/brand bike those were for?
Steel sprockets for sport, street and "for dirt bikes" are all manufactured alike, only change is in the dimensions.

Lil_Green_Demon · November 16th, 2013, 07:09 AM

Quote:

Originally Posted by Motofool

Can you simply measure and compare the dimensions before going by the word of the mechanic and buying more sprockets?

If the spline, width, off-center, etc. are like the original ones, I see no problem.

Did the mechanic mentioned what model/brand bike those were for?
Steel sprockets for sport, street and "for dirt bikes" are all manufactured alike, only change is in the dimensions.

No. Like I said, it's my friend's 250R. I wasn't there when the mechanic told him the sprockets are dirt bike ones and won't fit.

Anyway, thank you guys for the responses. Now I know better than to advise someone to buy something I don't know sh*t about.

Motofool · November 16th, 2013, 09:01 AM

Quote:

Originally Posted by Lil_Green_Demon

..........Anyway, thank you guys for the responses. Now I know better than to advise someone to buy something I don't know sh*t about.

I see.
Sorry that you got into that situation while your intentions were good.
The incorrect sprockets could be sold in e-bay to recover some of the money.

7oxSin · November 16th, 2013, 09:57 AM

Quote:

Originally Posted by alex.s

just hit it hard enough... it should go on

+1

November 15th, 2013, 05:24 PM	#1
Lil_Green_Demon Winging It In Life Name: Umar Location: SoCal Join Date: Aug 2011 Motorcycle(s): 2010 250R; 2011 250R (sold) Posts: A lot.	Mechanic telling my friend he bought the wrong sprockets The reason I'm asking is because I'm the one who recommended these to him for his 2010 Ninja 250R. Now I feel bad. You can look them up on Amazon.com. Rear sprocket is a JT Sprocket JTR210.43 43T Steel & the front sprocket is JT Sprockets JTF252.14 14T Steel. The mechanic told my friend that his sprockets, which he order off amazon.com after I told him what sizes I'd go with, are for dirt bikes, so he ordered new sprockets through the dealership. Can someone tell me if these sprockets are inaccurate? I don't remember which model number I bought of my own JT Sprockets, but I know they were 14T/43T from JT Sprockets. Someone please chime in. This is the same mechanic who told me my 140/70-17 rear tire wouldn't fit my bike. I think he's incompetent.

November 15th, 2013, 06:58 PM	#4
alex.s wat Name: wat Location: tustin/long beach Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much. Blog Entries: 5 MOTM - Oct '12, Feb '14	just hit it hard enough... it should go on __________________________________________________
	2 out of 2 members found this post helpful.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Talk about wrong time, wrong place	tlhamon	General Motorcycling Discussion	8	February 1st, 2015 12:07 PM
Friend just bought a 250 for the track	backinthesaddleagain	General Motorcycling Discussion	10	October 23rd, 2013 02:40 PM
The collar bone of a friend of a friend	Motofool	Ninjettes At Speed	14	May 13th, 2013 06:44 AM
Sprockets, sprockets, ahhh sprockets?!?!	shelei09	General Motorcycling Discussion	10	January 23rd, 2013 09:47 PM
So my friend bought a 2009 Honda CBR600RR...	py2e	General Motorcycling Discussion	49	April 23rd, 2009 09:55 AM

November 15th, 2013, 06:53 PM	#3
Lil_Green_Demon Winging It In Life Name: Umar Location: SoCal Join Date: Aug 2011 Motorcycle(s): 2010 250R; 2011 250R (sold) Posts: A lot.	Lesson learned. Thanks, @menikmati. I will probably buy my friend's sprockets for him. He went off my recommendation, though I didn't tell him the part #'s.

November 15th, 2013, 07:23 PM	#5
Bones85 ninjette.org member Name: Joe Location: Florida Join Date: Jan 2013 Motorcycle(s): 2009 Ninja 250R Posts: 206	Dammit, I think I made the same mistake too with the front sprocket I bought. A lot of the reviewers said they had a Ninja 250 though? This is the sprocket I bought: http://www.amazon.com/JT-Sprockets-J...pr_product_top Will it work for a 2009 Ninja 250?

November 15th, 2013, 07:41 PM	#7
Bones85 ninjette.org member Name: Joe Location: Florida Join Date: Jan 2013 Motorcycle(s): 2009 Ninja 250R Posts: 206	I should've realized this before but the Ninja 250 FAQ says it's for the pregen Ninja 250. Is it safe to use it with with the newgen and did yours fit without any modifications?