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Old February 6th, 2011, 01:03 PM   #121
caras
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Quote:
Originally Posted by dubojr1 View Post
Can you explain what you have done so far? Also, what method are you using to determine if the wheel is centered?
I've milled a lot of things,I have pictures of it,maybe if you could tell me the name of some simple picture editing program,in which I can mark things,and I'll upload pictures so you can see.... I'm measuring the distance between the rim and the swingarm,and it has to be the same on both sides,like it was on original ninja 250 rim, cca 30 or 31 mm has to be on each side with 650r rear rim..and to align sprockets and chain,I measured 18mm from rear swing arm to sprocket on ninja 250's rim and it has to be like that when I put 650r wheel and sprockets...simple as that...

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Old February 6th, 2011, 05:13 PM   #122
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here are some pics of what I did....

05022011258.jpg

05022011266.jpg

05022011276.jpg

05022011255.jpg

05022011254.jpg

05022011257.jpg

05022011265.jpg

05022011274.jpg
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Old February 11th, 2011, 07:51 PM   #123
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roa din a hard rain last night..it's bad enough gettin pushed across lanes by wind..def gonna do fatter tyres..wish there was a direct fit way to get a slightly wider rim on the rear..
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Old February 20th, 2011, 10:31 AM   #124
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so you are saying we need to find a 4 inch rear rim to swap. that way it will be easier to line up and will still accept a 150\60 just fine. I found a zxr250 rim on ebay, I have heard its a direct swap, is this true?
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Old February 20th, 2011, 09:29 PM   #125
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so you are saying we need to find a 4 inch rear rim to swap. that way it will be easier to line up and will still accept a 150\60 just fine. I found a zxr250 rim on ebay, I have heard its a direct swap, is this true?
The rear on them is 18"
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Old February 20th, 2011, 10:40 PM   #126
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The rear on them is 18"
do you think there would be clearance problems?
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Old February 21st, 2011, 12:00 PM   #127
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Alright guys, would an offset rear sprocket fix the alignment issues, and if so, does one exist or would it be difficult to make?

or even a 2 piece sprocket, get the sprocket closer to the wheel without modifying the sprocket hub?

EDIT I am going to email a couple of companies that make custom sprockets, if we took the 650r rim and centered it, how many milimeters would the sprocket be off? Thanks
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Old February 21st, 2011, 12:20 PM   #128
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Quote:
Originally Posted by caras View Post
I've milled a lot of things,I have pictures of it,maybe if you could tell me the name of some simple picture editing program,in which I can mark things,and I'll upload pictures so you can see.... I'm measuring the distance between the rim and the swingarm,and it has to be the same on both sides,like it was on original ninja 250 rim, cca 30 or 31 mm has to be on each side with 650r rear rim..and to align sprockets and chain,I measured 18mm from rear swing arm to sprocket on ninja 250's rim and it has to be like that when I put 650r wheel and sprockets...simple as that...
did it line up right with all that machining?
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Old February 21st, 2011, 07:07 PM   #129
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did it line up right with all that machining?
no....still doses't fit like it should...I don't have much free time to see where's the problem,maybe this weekend...my problem is rim-it isn't in the centre and I need to get another 2 mm,but don't know where to get it...
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Old February 22nd, 2011, 06:34 AM   #130
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I'd double check your measurements. From what i can see from your pictures, it looks as if you cut enough off the sprocket hub alone to make this work.
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Old February 22nd, 2011, 11:08 AM   #131
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can you please upload a picture of what excatly you've meant to mill,what part of sprocket hub ? and if you do that, then the rear sprocket will go closer to swingarm but the rim could be centered.
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Old February 22nd, 2011, 01:01 PM   #132
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What I was saying is I thought you had already milled the hub far enough. If you mill much further, the chain will begin to rub on the edge of the tire. Double check to make sure your the wheel is or is not centered. Here's a couple pics of the "Big Foot" kit and the results we are trying to duplicate. I realize these are all "new" parts but this is possible so don't give up.
Attached Images
File Type: jpg DSC00068.jpg (103.1 KB, 22 views)
File Type: jpg DSC00075.jpg (119.1 KB, 27 views)
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Old February 22nd, 2011, 02:12 PM   #133
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thanks a lot on this pictures,if you have some more please upload...
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Old February 23rd, 2011, 08:03 AM   #134
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Here's some other's that may help.

Again I'd like to stress what method you are using to center the rear rim. That's one of my questions to myself is how to know that the rim is in fact centered prior to taking measurements for milling the hub. Takes a week to get something milled here and at $150 an hour, I just want to make sure my measurements are right the first time.
Attached Images
File Type: jpg bigfoot1.jpg (63.7 KB, 16 views)
File Type: jpg bigfoot2.jpg (61.7 KB, 17 views)
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Old February 23rd, 2011, 08:43 AM   #135
caras
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Quote:
Originally Posted by dubojr1 View Post
Here's some other's that may help.

Again I'd like to stress what method you are using to center the rear rim. That's one of my questions to myself is how to know that the rim is in fact centered prior to taking measurements for milling the hub. Takes a week to get something milled here and at $150 an hour, I just want to make sure my measurements are right the first time.
I'm measuring the distance between the rim and the swingarm with vernier caliper...I don't know exact measures right now because I'm at work
and I have a milling worker or how do you call it,in my family so milling is nearly free to me so I can efford myself mistakes in measuring as long as I don't cut too much if you are looking for exact measures of something exactly feel free to ask,I'll check it in my book and post it here...thanks on this pics,this rear tire looks so cool on wider rim.is it 160 tire on the pics ?
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Old February 23rd, 2011, 11:47 AM   #136
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Quote:
Originally Posted by caras View Post
I'm measuring the distance between the rim and the swingarm with vernier caliper...I don't know exact measures right now because I'm at work
and I have a milling worker or how do you call it,in my family so milling is nearly free to me so I can efford myself mistakes in measuring as long as I don't cut too much if you are looking for exact measures of something exactly feel free to ask,I'll check it in my book and post it here...thanks on this pics,this rear tire looks so cool on wider rim.is it 160 tire on the pics ?

I'm not sure that is the best way to measure. The objective is to make sure the rear wheel is following the front one. We need to figure out a way to determine if the position of the rear tire is aligned with the front and not just measuring off of the swingarm.

Btw... that is a 150/60/17 I believe.
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Old February 23rd, 2011, 12:52 PM   #137
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Originally Posted by dubojr1 View Post
I'm not sure that is the best way to measure. The objective is to make sure the rear wheel is following the front one. We need to figure out a way to determine if the position of the rear tire is aligned with the front and not just measuring off of the swingarm.

Btw... that is a 150/60/17 I believe.
my concept goes this way...my original 250r rim was in the center of the swingarm and it had same distance from rim to the swingarm on both sides....when I put 650r rim in the swingarm I have to manage same distance on both sides again...simple as that,isn't it ?
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Old February 23rd, 2011, 01:14 PM   #138
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Quote:
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my concept goes this way...my original 250r rim was in the center of the swingarm and it had same distance from rim to the swingarm on both sides....when I put 650r rim in the swingarm I have to manage same distance on both sides again...simple as that,isn't it ?
That's assuming not only your original rim was perfectly adjusted when the measurements were taken and it also assumes the 650R rim would be centered if you measure it the same way. In my opinion... this method is not full proof. I'm thinking the "string" method of aligning the wheels may be a better solution. Once the wheels are aligned then we can work on spacer thickness and chain alignment. Have a read of this...

http://www.motorcyclistonline.com/ho...els/index.html
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Old February 23rd, 2011, 01:49 PM   #139
caras
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Originally Posted by dubojr1 View Post
That's assuming not only your original rim was perfectly adjusted when the measurements were taken and it also assumes the 650R rim would be centered if you measure it the same way. In my opinion... this method is not full proof. I'm thinking the "string" method of aligning the wheels may be a better solution. Once the wheels are aligned then we can work on spacer thickness and chain alignment. Have a read of this...

http://www.motorcyclistonline.com/ho...els/index.html
thanks on link, I'll read that tonight when I come home....
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Old March 15th, 2011, 07:59 AM   #140
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thanks on link, I'll read that tonight when I come home....
Any progress?
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Old August 3rd, 2012, 10:13 PM   #141
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Both 650 and 250 rotors are the same diameter?

also what is the total distance between both sides of the swingarm on the 250?
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Old June 22nd, 2019, 06:34 PM   #142
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Finishing up this thread since questions about how to center 650 wheel was never fully answered. Yes, you have to move sprocket in towards wheel by machining sprocket carrier. But this does NOTHING to move wheel itself, only the sprocket.

Second part that needs to be machined is left SPACER. Remove 6.5mm from that and it moves wheel 6.5mm to left to centre in swingarm. Then machine 6.5mm from brake-caliper holder/spacer on right and that's it, you're done! Drawing some pictures really helps with stiff like this. Hand-drawn on napkins is still better than nothing.
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