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Old 01-07-2011, 07:19 PM   #31
tjrockit
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I'm going to hold on a group buy for a bit until I can do my own research. I work for a company that has offices internationally so I'm going to try and work a few connections to see what I can find out.

Thanks for trying to coordinate this.
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Old 01-07-2011, 10:00 PM   #32
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Research away, we need all the help we can get to find a cheaper source

I wonder if it's really true that the NX650 Dominator and the FMX650 bikes are European only. That's why I started looking at Honda dealers in the Orient.

I haven't given up finding another parts source just yet.
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Old 01-08-2011, 06:12 AM   #33
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Quote:
Originally Posted by Ghost_Mutant View Post
Research away, we need all the help we can get to find a cheaper source

I wonder if it's really true that the NX650 Dominator and the FMX650 bikes are European only. That's why I started looking at Honda dealers in the Orient.

I haven't given up finding another parts source just yet.


Western Honda
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Old 01-08-2011, 06:51 AM   #34
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Just copying this info into this thread so it is easier to find.

Quote:
Originally Posted by flatfender View Post
It is not mythical. The 20 tooth counter shaft fifth gear is on the left, stock 21 tooth on the right.



Yes, it slides right on the counter shaft. Here is a pic with it on a 600R counter shaft (I'm adding a kick start lever too)



The gear is not hard to find at all. But, it is a Honda-of-Europe part only. If I gave you the part number (23491-MW2-780) and you asked your local Honda parts guy he would tell you it is not available. This gear was installed in 1996-1999 NX650 and all FMX650 bikes.

The one tooth difference doesn't sound like much but when you multiply in the primary and final reductions it works out to an approximate three tooth addition on the rear sprocket. In other words if you ran 15/48 sprockets it would cruise in fifth like it had 15/45 sprockets and so forth.

I bought mine at David Silver Spares in the UK. It was about $170 plus $50 for shipping. (yeah I know ouch!) You could also cruise ebay-motors UK/Germany/Italy and find someone parting out one of the above bikes. A complete FMX650 transmission recently sold on ebay.motors.UK for about $150 plus shipping. This would give you both the lower second gear and the higher fifth. HTH
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Old 01-09-2011, 07:27 PM   #35
Bbasso
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What are the actual part numbers for the two gears?
I'll do some asking around, no promises...
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Old 01-09-2011, 09:30 PM   #36
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Getting the 2nd gear here in the States does not appear to present a problem other than the wait for this on back order. That part number is:
23421-MN9-010

The problem gear is the NX/FMX 5th. Part number from the 1st post is:
23491-MW2-780

I still haven't found a cheaper source, but I'm still looking.
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Old 01-09-2011, 09:32 PM   #37
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Gears

It's post #1


2nd 23421-MN9-010
5th 23491-MW2-780
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Old 01-17-2011, 01:15 PM   #38
Ghost_Mutant
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I'll bump this back up to the top of the list.

I just ordered two 2nd gears from Western Honda. It was slightly cheaper than cheapcycleparts. I'm sure it will be on back order for awhile.

Don't know about the 5th gear yet. I'd still like to get it, but I still haven't found anyplace cheaper to order it from.

Has anyone else made progress finding a cheaper source?

Steve announced in the XRL thread that Revloc could be experimenting with a Dyna Ring for the Honda. I hope that appears later this year.
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Old 01-17-2011, 07:23 PM   #39
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Still waiting to hear from the people at my company. It may be a while since they are doing me a favor, so I don't want to press it.
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Old 01-20-2011, 06:05 AM   #40
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One of my contacts came back with a price of about $217 depending on the currency exchange at the time.

It's amazing how expensive this one gear is.

I'm waiting to hear from my contact in Japan to see if it's any better...
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Old 01-22-2011, 10:19 PM   #41
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Add me to the list.
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Old 01-23-2011, 09:29 AM   #42
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Originally Posted by Ghost_Mutant View Post
I would like to hear Flatfender comment on his gear swap and tell us if it was truly worth it.
For what it is I think it's worth it. Others may differ. If you live where the maximum highway speed limit is 50mph then it may not be worth it. It's only 5% different.

If any of you guys have run stock 15/45T sprockets and liked how well the bike travels at 65, and, if you've also run 15/48T or 14/45T sprockets and liked how much easier the bike handles off road then you already know what this gear change would be like because adding the 20 tooth 5th gear with 15/48T sprockets would be like having 15/48 sprockets in first-fourth gears for off road and zipping through traffic and simultaneously having 15/45T sprockets for fifth gear on the highway.

As far as price, okay yes it is a small chunk for something that only you will notice, no shiny muffler or anodized farkle to massage your ego.

Think about it, how many ADV bikes can this be done to? Hell the big BMW GS you can't even change the final drive ratio. Here are the many different transmission gear ratio that can be used in the XR-L. There are also several different primary drive ratios but adding or switching them would be no different than changing the sprocket ratios. I feel fortunate for just having these options, every gear except fourth has at least two choices.

GB500
31/13 2.38
28/18 1.55
24/20 1.20
23/23 1.00
21/24 0.875
1993-1999 NX650 & FMX650
32/12 2.66
28/16 1.75
25/20 1.25
23/23 1.00
20/25 0.80
XR650L
32/12 2.66
28/17 1.65
25/20 1.25
23/23 1.00
21/25 0.84
XR600R & XL600R and maybe the FT500
31/13 2.38
28/17 1.65
25/20 1.25
23/23 1.00
21/25 0.84

I tried finding out where Honda sold the 1993-1999 NX650, google sucks as you know, can't get a hit. I think Australia and Brazil may be other places to look for this gear. Good luck guys.
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Old 01-23-2011, 12:06 PM   #43
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Quote:
Originally Posted by flatfender View Post
.... Here are the many different transmission gear ratio that can be used in the XR-L. There are also several different primary drive ratios but adding or switching them would be no different than changing the sprocket ratios. I feel fortunate for just having these options, every gear except fourth has at least two choices.
Is that to say, that in any of these bikes, the different gearing combos can be swapped interchangeably?
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Old 01-23-2011, 04:59 PM   #44
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Here's a complete NX tranny on german fleabay: 130404487341
Good luck.
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Old 01-23-2011, 06:34 PM   #45
flatfender
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Originally Posted by beechum1 View Post
Is that to say, that in any of these bikes, the different gearing combos can be swapped interchangeably?
Maybe, a guess would be Honda used different gear counts but the mainshaft and countershaft splines are the same, (bikes with a kick start had a different countershaft but same splines/dimensions) which would conclude the gears will swap. The 2nd and 5th gear went in perfectly and the old XR-L gear on the corresponding shaft was used.

You can also ask Honda parts 'what are the dimensions spline counts and etc.' of a particular part and they will provide the information. If the spline counts are the same in number they will be the same dimensionally for either the gear or the shaft. The gears are cut on centers so you do not need to buy a matching gear for the opposite shaft. It's not like a sprocket where the 48 tooth is bigger than a 45 tooth.

Here's an xls gear ratio calculator, you can play around with the numbers to give you an idea of how much difference a gear swap will make.

http://www.4strokes.com/tech/gearing_calc.xls
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