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Old 12-15-2012, 06:46 PM   #6406
MCCOYBOY
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Finally!

I bought it in rough shape a little over a week ago. It still needs cosmetic stuff but I'm taking it out tomorrow to test the revalve I'm trying on the shock and forks. It has the thumper racing 660 kit, forks from a crf450x and a few other goodies. Should be a blast when I'm done!
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Old 12-15-2012, 07:55 PM   #6407
elsalvadorklr
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niiiiiiiiiiiiiiiiiice!

also xl600 headers! and wrapped!

someone knew what they were doing to the bike you have there...nice score
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Old 12-18-2012, 12:43 PM   #6408
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mikuni pilot jets anyone?

well not a lot of action on this thread lately, maybe everyone is doing some christmas riding...lucky punks!

anywhoo to bump this thread here goes:

anyone have some mikuni pilot jets hanging around? wanna trade for some stock jets?

I dont want to give up on my tm38 carb...so if you guys have some pilot jets, maybe a 17.5, 15 and a 12.5 laying around shoot me a pm

thanks guys
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Old 12-18-2012, 12:52 PM   #6409
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You just have to futz with it don't ya.

Thinking of going over to Marin this afternoon. I could stop at that shop and pick the jets up if you want.

Mail them in a Christmas card.
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87 Harley FXRS-SP ~ 06 KTM 625 SMC ~ 72 Honda CB750/915cc ~ 92 XR600/654cc ~ 95 XR650l/675cc ~ 03 CRF450r ~ 05 CRF450x ~ 02 XR650l/675cc ~ 86 YZ490 ~ 93 YZ80 ~ 93 XR650l Project
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Old 12-18-2012, 01:39 PM   #6410
elsalvadorklr
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well you know me boss...if I can get either of the carbs to start and perform better than right now Ill do it...

the tm38 is better at not dying instantly if you tipover...it will keep running and since Im a short mother that means I dont have to stand there kicking forever if I do stall it...

not saying Im a racer but its just annoying

was just wondering if somebody wants to trade some jets...jajaja keep it on the cheap $$$$

appreciate it though...
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Old 12-18-2012, 06:25 PM   #6411
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Quote:
Originally Posted by beechum1 View Post
I'm an idiot. I don't understand what that means. Less top speed? same transmission ratio, just less top speed in each?
Sorry to tell have you this... but you have the answer correct.

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Old 12-18-2012, 06:29 PM   #6412
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Sorry to tell have you this... but you have the answer correct.

which part?
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I used to say "one day" a lot. But then I got scared I would wait one day too long. So I am doing it all now
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Old 12-18-2012, 06:31 PM   #6413
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which part?
All of it.

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Old 12-18-2012, 06:33 PM   #6414
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All of it.

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I used to say "one day" a lot. But then I got scared I would wait one day too long. So I am doing it all now
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Old 12-18-2012, 06:40 PM   #6415
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Here's a post I made over on tt... Ask any question you have...


XL600R

Primary Reduction 2.188 (70/32)

1st Gear '83-84 is 13/32 (2.46)

1st gear '85-87 is 13/31 (2.38)

'85-'87 XR600R & XL600R

31/13 2.38
28/17 1.65
25/20 1.25
23/23 1.00
21/25 0.84

XR600R gear ratios

Primary reduction 2.188 (70/32)
Final reduction 3.429 (48/14)
1st: 2.385 (31/13)
2nd 1.647 (28/17)
3rd 1.250 (25/20)
4th 1.000 (23/23)
5th 0.840 (21/25)


XR650L Gear ratios

Primary Reduction: 2.029 (69/34)
Final Reduction: 3.0 (45/15)
1st: 2.66 (32/12)
2nd: 1.647 (28/17)
3rd: 1.250 (25/20)
4th: 1.00 (23/23)
5th: 0.840 (21/25)



NX650 & FMX650 gear ratios
Primary Reduction: 2.029 (69/34)
Final Reduction: Varies
1st 2.66 (32/12)
2nd 1.75 (28/16)
3rd 1.25 (25/20)
4th 1.00 (23/23)
5th 0.80 (20/25)


GB500
31/13 2.38
28/18 1.55
24/20 1.20
23/23 1.00
21/24 0.875

XR650L
Primary Reduction 2.029 (69/34)

XR600R
Primary Reduction 2.188 (70/32)

XR600R
HRC KIT
Primary Reduction 2.029(69/34)

XR 5Tth gear 21/25

NX 5th gear 20/25

It sounds like you could play on http://www.gearingcommander.com/ for a while.

You can change the listed NX650 5th gear tooth count to the Euro spec.



Here's a copy of 'davek18' reply.


I used that same chart and elaborated with different primary and final drive ratios back when I was trying to decide what gearing I wanted to run.





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Old 12-18-2012, 07:00 PM   #6416
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I have. What does primary reduction mean. Where is that?

The clutch basket to main shaft?

And it appears that smaller #'s mean faster.
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I used to say "one day" a lot. But then I got scared I would wait one day too long. So I am doing it all now
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Old 12-18-2012, 07:14 PM   #6417
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Quote:
Originally Posted by beechum1 View Post
I have. What does primary reduction mean. Where is that?

The clutch basket to main shaft?

And it appears that smaller #'s mean faster.

Thats right. The primary drive ratio is the gearing between the crankshaft and the transmission input shaft.

The lower ratio/smaller number equals higher speed and lower engine rpm.

The gearing link I posted will help show good examples if you try some different bike/gearing combos.

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Old 12-18-2012, 07:22 PM   #6418
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I will admit my math teacher was right when he told me to pay attention.

It's all math... Primary ratio x transmission ratio x final drive = overall ratio. The tire and RPM add a whole bunch of extra math.


Horsepower is just a math problem too. Torque x RPM divided by 5252 equals horsepower.


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Old 12-18-2012, 08:52 PM   #6419
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Originally Posted by MentalGuru View Post
I will admit my math teacher was right when he told me to pay attention.

It's all math... Primary ratio x transmission ratio x final drive = overall ratio. The tire and RPM add a whole bunch of extra math.


Horsepower is just a math problem too. Torque x RPM divided by 5252 equals horsepower.


I was advanced physics and math in highschool. 20 years ago!!!
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I used to say "one day" a lot. But then I got scared I would wait one day too long. So I am doing it all now

beechum1 screwed with this post 12-18-2012 at 09:28 PM
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Old 12-19-2012, 03:47 AM   #6420
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I was advanced physics and math in highschool. 20 years ago!!!

It's been 30 years for me!!! I can even still remember some....
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