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Old 12-06-2011, 07:31 PM   #21
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You need to count spokes front and rear to determine if a hoop (either front or rear) can be laced to the other. After that, call Buchanan and have some spokes made.
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Old 12-06-2011, 07:52 PM   #22
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I think he is talking about.getting another front rim to replace the back. Im not to sure what your y
talking about??
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Old 12-06-2011, 07:53 PM   #23
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per the buchanan web site http://www.buchananspokes.net/produc...awasaki_kx.asp

you have 32 spokes front and rear so you can get another front and run it on the back and run the gp silcks like peter mentioned
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Old 12-06-2011, 07:57 PM   #24
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Quote:
Originally Posted by QUICKGIXX View Post
I think he is talking about.getting another front rim to replace the back. Im not to sure what your y
talking about??
after getting another front hoop you will need to have it laced to the rear hub

call buchanan and they can get you what you need as the rear spokes will have to be made

get 9 gauge spokes, stainless spokes & nipples for the front and the rear
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Old 12-06-2011, 11:18 PM   #25
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Ok so i should re-lace the front with bigger spokes also?? Should i try and get a wider rim for the back?? What size gp slicks could i run?? Can they be staggered? Or will they both be the.same size?? Thanks for the help guys really. I know i ask alot of questions i just wanna get it right ya know
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Old 12-07-2011, 03:46 AM   #26
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Quick Gixx and fellows bare with me here.

I wrote about this on the HPC site in the Mini section as one of the CMRA racers was asking the same questions you are asking. It is more indepth and I share the problems you will experience spooning a GP 125 tire onto a stock KX sized 1.85 inch rim. GP 125 tires are not recommended to be on a rim narrower then a 2.50 in width. Go take a few minutes and give it a read.

Seriously a few dollars more spent for the correct fit will keep you regretting what you are about to do.

Ask Mr. P. I know he will concur as to what I'm binging to your attention .

Also, the bike you are putting together can be raced in the Formula 4 mini sprint and F4 mini endurance divisions with the CMRA. So lots of track time for ya.

Good Luck to ya.
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Old 12-07-2011, 12:41 PM   #27
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@gateman:........you know i was doing the math.and if i decide to keep my stock wheels it would cost me probably around $250 to get a new front rim and 2 spoke kits. I found a place where i can get 12x2.15 rims and spoke kits for $350. I would rather spend the extra 100 dollars for peice of mind. Plus black 12s look sooooo much better....lol. i bouht the bike in great condition for $600 so i have a little bit of wiggle room. I just dont want to invest 3k in a mini tard. I would rather put.that into my track bike.
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Old 12-07-2011, 03:16 PM   #28
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Quote:
Originally Posted by Gateman View Post
Quick Gixx and fellows bare with me here.

I wrote about this on the HPC site in the Mini section as one of the CMRA racers was asking the same questions you are asking. It is more indepth and I share the problems you will experience spooning a GP 125 tire onto a stock KX sized 1.85 inch rim. GP 125 tires are not recommended to be on a rim narrower then a 2.50 in width. Go take a few minutes and give it a read.

Seriously a few dollars more spent for the correct fit will keep you regretting what you are about to do.

Ask Mr. P. I know he will concur as to what I'm binging to your attention .

Also, the bike you are putting together can be raced in the Formula 4 mini sprint and F4 mini endurance divisions with the CMRA. So lots of track time for ya.

Good Luck to ya.
TJ.
I guess what I was recommending was finding a garage fresh used 17" front rim and paying $75 for spokes, then finding two 125 front take offs. That would make the conversion run in the $100 range plus your labor. It also saves you having to regear for the smaller wheels. And it keeps the bike closest to stock. $350 plus $200 in tires, plus a sprocket is like $600. That's a heap more than $100, but for some folks, it's just a blip on the monthly expense spreadsheet.

Sure, correct GP rims with 125 tires will work better than 125 tires on skinny motocross rims with a 10% profile pinch. However, many guys in TMGP have had good success with putting 17" CR/RM/YZ 85 front ends on their XR100 race bikes and just living with the fact that the tire is pinched an extra .65 inches. If you get to the limit of traction and feel like the tires are the limiting factor, you should then consider 12's and resell your 17 inch set up to me for my XR100, LOL.





From SMJ....

1 I`m building a 2000 xr 100 mini motard, It`s got stock wheels with street tires on it & it sucks. Buchanan is gonna send me the rims and spokes.
But before I order them What size can I fit in the front and rear?
Can it fit 17x2.5 front & 17x3.5 rear ? What rim and tire width should I run?
Any help would be appreciated...

2yes, that is the correct rim size.Run 125GP tires from dunlop, mich or bridgestone. Sizes are roughly 90/75x17 front, 115 or 120/55x17 rear. Don't let anybody try to fool you into putting a 120 on the front.

3dustin,

most people that i know have used 2.5 front and rear and it works just fine.
i can not think of how a 3.5 rear would benefit an XR100.

i should have clarified more, everybody i know runs 2.5s with GP fronts on the front and rear of their XRs.

4I agree with LJB. A 3.5 rear is a little much for just an xr100. That is a lot of wheel for that little motor to spin! 2.5 or 2.75 are fine, 3 max!
I am going to be running 2.5" excels with a 115 front and a 120 rear. I am running these sizes in rubber because I'm a cheap and can only afford Takeoffs from my buddies!
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Old 12-07-2011, 03:44 PM   #29
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TJ, haha, I just realized it was you. You do everything big, as best you can, with the goal to win. I think this guy just wants to give the track a try for just a little scrap of money. Otherwise, why not go 17" excel front and rear, double butted oversize spokes, stainless nipples, and brand new set of proper tires?
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Old 12-07-2011, 07:30 PM   #30
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Mr. P you made a good point. I never thouht about re-gearing. What. Size front and rear sprocket, and chain should i get to run 12's
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Old 12-07-2011, 09:07 PM   #31
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Quick G. Here ya go. Easy to see and understand. 12's and 17's . Rim sizes and Cam is one of the best as is A & A Racing in San Carlos, CA. which is who I use.

http://www.mmracing.biz/

Do check the rim sizes as Cam will advise you regarding tire sizes and selections that are readily available. Meaning convenience. There are some pics for you to view of finished products in 12" and 17".

Check out the brake systems. That will be your next little project. Hey it's a labor of Love.

HA ha P. Shad..... Of course build them to WIN and LAST. It's paid off as one set on the KX 100 is 6 years old and the second set is 4 years old.
TJ.

Last edited by Gateman; 12-07-2011 at 09:09 PM. Reason: spell ck.
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Old 12-07-2011, 11:00 PM   #32
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Thanks gateman!!! I got her on sunday after work. I have been working all week and havent got to mess around with her at all....lol. im off tomorrow, and i finally get to play with her. Thats all i have been thinking about all week......lol. just like a kid!!! My wife just doesnt understand how a grown man can get so "giddy" about a motorcycle....lol
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Old 12-08-2011, 11:09 PM   #33
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Quick G. Hey come look me up this weekend I just live up the road in Conroe just across the river. You can get a good visual of my KX 100 and I will share with you the short cuts to this game.

Here's a contact # (936) 672-2672

On the lighter side....beware calling your new ride as a HER. Your wife will suspect the worst and if she doesn't she will most likely find you a shrink to visit. Just say'in.

Give me a call.
TJ.
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Old 12-08-2011, 11:37 PM   #34
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Mini racing is a blast!!! I picked up a TTR125 and did 3 rounds of endurance and 4 sprint weekends. I was able to enter 5-6 sprint classes.

Just a thought, I think you can only do 1 sprint class with an 80cc 2-stroke ... something to consider.
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Old 12-09-2011, 12:24 AM   #35
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Quote:
Originally Posted by Gateman View Post
Quick G. Hey come look me up this weekend I just live up the road in Conroe just across the river. You can get a good visual of my KX 100 and I will share with you the short cuts to this game.

Here's a contact # (936) 672-2672

On the lighter side....beware calling your new ride as a HER. Your wife will suspect the worst and if she doesn't she will most likely find you a shrink to visit. Just say'in.

Give me a call.
TJ.
ya sounds good. I usually work weekends, but I'm off this sunday for once. Ill hit you up. I think it would help to check out a bike thats already set up. talk to you then.
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Old 02-02-2012, 02:13 PM   #36
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ok, have you got that little ready to ride yet?

I am getting anxious to get out and play...
mine is all done and ready to go, but I have not got a chance to ride it yet...
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Old 07-31-2012, 08:11 AM   #37
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ok soooo im bringing my old thread back to life. I stopped my build for a little while because i had a little too much going on with my other two bikes. Recently I bought a fully built front end from a member of the forum. It has 17" excel rim with a 125 gp slick. It has heavier springs, bigger disk, and a caliper relocator bracket. It also has a bigger master cylinder looks like its from a crf 250/450
My B-DAY is right around the corner so I talked the wife into getting me a rear wheel built. All I have left is the shock spring, chain, sprockets, and a little fine tuning of the carb. Im almost ready to go. Im guessing I probably wont make any races this season but I will for sure be out there next season. Im gonna have to drag a couple of you mini pros to katy to show me the ropes.
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Old 07-31-2012, 08:23 AM   #38
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sounds good... TK found a stem for me, so I will be sending them the KX85 tripple...
when it gets back I will swap the front ends... so i will soon have better brakes on the front...gonna have to learn the bike all over again.
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Old 07-31-2012, 08:47 AM   #39
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awesome.........sooooo now do you want to sell me your rear wheel? haha Ill trade you for a kx80/85 front end with wheel tires, rotors, and master cylinder.....lol
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Old 07-31-2012, 09:05 AM   #40
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I have a KX85 rear wheel...17" excell rim with bridgestone GP125 slick on it.
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