72 tooth pulley

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Last post 10-28-2006 12:34 AM by Warrior1oz. 9 replies.

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10-24-2006 11:56 PM

Warrior1oz
Joined on 01-12-2005
Mount Annan Australia
Posts 2,441

72 tooth pulley

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I have just bought a 72 tooth pulley and I have a 33 on the front, is it worth my while to get a 2 tooth longer belt or more, or keep the old one.
Thanks in advance for your help.

Cheers

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10-26-2006 3:50 AM Sponsored Links

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10-25-2006 1:02 AM In reply to

AlanH
Joined on 05-07-2004
Lakeview MI USA
Posts 5,057

Re: 72 tooth pulley

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72T driven by 33T will bring you back to stock ratio of 70T & 32T. You're going to lose the benefit of the 33T less RPM at highway speeds [

]

If you plan on running a 240 wide tire kit in the future you'll need a longer belt else the wheel will rub.

I suspect with this new combination that the stock wheel is very close to the swing arm [:0]

*** Creator of the SS Laser Front Signal Bracket and Tuning Fork Lower Cowl Grille ***

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10-25-2006 1:38 AM In reply to

Warrior1oz
Joined on 01-12-2005
Mount Annan Australia
Posts 2,441

Re: 72 tooth pulley

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So that means I would need to get a 68 tooth to max the bennifit on highway speeds?
I haven't fitted it up yet, but I would suspect that you are right and it would be too close to the swing arm for comfort.
I'll have a look on EBay for a 68 and that should give me better H/way cruising?

Cheers

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10-25-2006 8:05 AM In reply to

OhioMike
Joined on 03-08-2005
OH USA
Posts 11,277

Re: 72 tooth pulley

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That sucks but if you do go 68 you will need a longer belt..

Guns don't kill people. People kill people.

10-25-2006 8:47 AM In reply to

xenarchi
Joined on 04-14-2004
Dirty Jeerze
Posts 6,800

Re: 72 tooth pulley

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Well on a brighter note the pulley was only 5 bucks!

10-25-2006 11:14 AM In reply to

AlanH
Joined on 05-07-2004
Lakeview MI USA
Posts 5,057

Re: 72 tooth pulley

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Proposed 68t+33t=101t

Stock 70t+32t=102t so the stock belt should be fine as it's longer [

]

quote:
Originally posted by ohiomike

That sucks but if you do go 68 you will need a longer belt..

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10-25-2006 5:35 PM In reply to

The_editor
Joined on 03-09-2004
cocoa FL USA
Posts 1,566

Re: 72 tooth pulley

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I think a 72 on a stock drive pulley will be your best bet... AND it may have the added benefit of regulating your speedo to actually READ CORRECTLY!
Personally I think I would like the larger front pulley, but that 135 MPH wall is an intriguing thing to smash through, too!

The Editor
If I have to explain...
You will buy a Warrior
Instead

10-26-2006 1:42 AM In reply to

Warrior1oz
Joined on 01-12-2005
Mount Annan Australia
Posts 2,441

Re: 72 tooth pulley

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Ohiomike shouldn't that be shorter cause it's a smaller pulley so it will move back further ?

Xenarchi, yeah can't complain about 5 bucks, one of my mates will want it instead of a 33 front.

AlanH, so the bike should cruise better with the 101t set up ?

Cheers

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10-26-2006 3:50 AM In reply to

AlanH
Joined on 05-07-2004
Lakeview MI USA
Posts 5,057

Re: 72 tooth pulley

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The speed of the rear wheel increases as the ratio between the front & rear pulley decrease.

72 / 32 = 2.250 = -2.86% more torque

70 / 32 = 2.188 = 0.00% Stock

72 / 33 = 2.182 = 0.26%

68 / 32 = 2.125 = 2.86%

70 / 33 = 2.121 = 3.03%

68 / 33 = 2.061 = 5.80%

*** Creator of the SS Laser Front Signal Bracket and Tuning Fork Lower Cowl Grille ***

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10-28-2006 12:34 AM In reply to

Warrior1oz
Joined on 01-12-2005
Mount Annan Australia
Posts 2,441

Re: 72 tooth pulley

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Thanks very much AlanH your worth your weigh in gold. Brain wasn't functioning real well. One of them CRAFT moments.
Can't Remember a F&cken Thing. LOL

Cheers

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