Call all XR600R!!! - Page 428

beechum1 · 12-15-2012, 03:19 PM

Quote:

Originally Posted by mcma111

The XR and XRL both have the same 17 tooth second gear. What is different is the main shaft on the XR600 is 13 tooth and the XRL a 12 tooth.

I'm an idiot. I don't understand what that means. Less top speed? same transmission ratio, just less top speed in each?

MCCOYBOY · 12-15-2012, 06:46 PM

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!

elsalvadorklr · 12-15-2012, 07:55 PM

niiiiiiiiiiiiiiiiiice!

also xl600 headers! and wrapped!

someone knew what they were doing to the bike you have there...nice score

elsalvadorklr · 12-18-2012, 12:43 PM

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

mcma111 · 12-18-2012, 12:52 PM

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.

elsalvadorklr · 12-18-2012, 01:39 PM

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...

MentalGuru · 12-18-2012, 06:25 PM

Quote:

Originally Posted by beechum1

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.

beechum1 · 12-18-2012, 06:29 PM

Quote:

Originally Posted by MentalGuru

Sorry to tell have you this... but you have the answer correct.

which part?

MentalGuru · 12-18-2012, 06:31 PM

Quote:

Originally Posted by beechum1

which part?

All of it.

beechum1 · 12-18-2012, 06:33 PM

Quote:

Originally Posted by MentalGuru

All of it.

MentalGuru · 12-18-2012, 06:40 PM

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.

beechum1 · 12-18-2012, 07:00 PM

I have. What does primary reduction mean. Where is that?

The clutch basket to main shaft?

And it appears that smaller #'s mean faster.

MentalGuru · 12-18-2012, 07:14 PM

Quote:

Originally Posted by beechum1

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.

MentalGuru · 12-18-2012, 07:22 PM

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.

beechum1 · 12-18-2012, 08:52 PM

Quote:

Originally Posted by MentalGuru

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!!!

12-15-2012, 06:46 PM	#6407
MCCOYBOY Adventurer Joined: Jan 2012 Location: Swanton, MD Oddometer: 41	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!

12-18-2012, 12:43 PM	#6409
elsalvadorklr Beastly Adventurer Joined: Nov 2008 Location: el salvador Oddometer: 3,974	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

12-18-2012, 12:52 PM	#6410
mcma111 Beastly Adventurer Joined: Jul 2007 Location: San Francisco,Ca. Oddometer: 8,145	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. __________________ Steve in SF BMW's 58 R26 79 R100s 91 R100gs 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

12-18-2012, 06:40 PM	#6416
MentalGuru Crazy Diamond Joined: Aug 2011 Location: Mental Ward Oddometer: 726	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. __________________ Praise the Lord!!! I have seen the light!!! He has shown me the promised land!!! TT for now...

12-18-2012, 07:00 PM	#6417
beechum1 Beastly Adventurer Joined: Oct 2007 Location: Herlong, CA. Look it up, I'll wait. Oddometer: 4,931	I have. What does primary reduction mean. Where is that? The clutch basket to main shaft? And it appears that smaller #'s mean faster. __________________ www.bajastarz.com \\\ 94 XR650L, 85 GL1200A Rally Moto Kit /// Vendor Thread

12-15-2012, 07:55 PM	#6408
elsalvadorklr Beastly Adventurer Joined: Nov 2008 Location: el salvador Oddometer: 3,974	niiiiiiiiiiiiiiiiiice! also xl600 headers! and wrapped! someone knew what they were doing to the bike you have there...nice score

12-18-2012, 01:39 PM	#6411
elsalvadorklr Beastly Adventurer Joined: Nov 2008 Location: el salvador Oddometer: 3,974	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...

12-18-2012, 07:22 PM	#6419
MentalGuru Crazy Diamond Joined: Aug 2011 Location: Mental Ward Oddometer: 726	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. __________________ Praise the Lord!!! I have seen the light!!! He has shown me the promised land!!! TT for now...

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: .
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode