30/70 pulley combo
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Cruiser
Joined: Oct 2008
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From: Austin,tx
30/70 pulley combo
Who has a 30/70 pulley combo?
I have already changed to the 30 tranny pulley, with the stock size belt(131) and pulley(66t) my rear tire is only 1/4 of an inch from swingarm. I put it all together like this to find out if my mod would work, now that I am satisified, I want to move the wheel back a bit. A longer belt means I might as well change the pulley.
I am intrested to know about real life experiences, the gear #s do not translate into my head.
thanks,
paul
I have already changed to the 30 tranny pulley, with the stock size belt(131) and pulley(66t) my rear tire is only 1/4 of an inch from swingarm. I put it all together like this to find out if my mod would work, now that I am satisified, I want to move the wheel back a bit. A longer belt means I might as well change the pulley.
I am intrested to know about real life experiences, the gear #s do not translate into my head.
thanks,
paul
Cruiser
Joined: Jun 2010
Posts: 196
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I'm confused. If you installed a smaller front pulley, how come your wheel is all the way up to the swingarm?
Sounds like you need a longer belt, ESPECIALLY if you increase the size of the rear pulley.
The 30/70 is going to be significantly lower gearing, more than a 10% reduction.....Might make first pretty useless, which means that it's too low. Get a longer belt, if possible, to move the wheel back.
This is why I prefer chain drive for custom and high performance bikes. Set up the gear ratio you want, then cut the chain to fit.
Sounds like you need a longer belt, ESPECIALLY if you increase the size of the rear pulley.
The 30/70 is going to be significantly lower gearing, more than a 10% reduction.....Might make first pretty useless, which means that it's too low. Get a longer belt, if possible, to move the wheel back.
This is why I prefer chain drive for custom and high performance bikes. Set up the gear ratio you want, then cut the chain to fit.
Thread Starter
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Cruiser
Joined: Oct 2008
Posts: 218
Likes: 2
From: Austin,tx
yes, the 30t pulley did push wheel back a smidge, I have a modified 240 swingarm with a V-rod 18x5.5 wheel. Its not even close to the stock length. I plan on getting a longer belt regardless so I thought about a bigger pulley. The 70t is one option but the 72t is screaming for my attention.
Chains are not what I want.
Yes, first will run out real quick, but I want to know how it cruises on the highway with the 30/70 combo
Chains are not what I want.
Yes, first will run out real quick, but I want to know how it cruises on the highway with the 30/70 combo
Cruiser
Joined: Apr 2009
Posts: 243
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sb
Got ya filth..well with the stock 32/66 the ratio is 2.06...and when i changed mine to a 30t i gained about 300rpm at a 2.2 ratio. Going to a 70 rear would put ya at a 2.3 ratio..go it would be around another 150rpm increase..so over stock your looking at around a 400-450 rpm increase...i think 1st would be more then usefull...btw..is the rear tire dia. the same size?That will also play into gear ratio change..
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Cruiser
Joined: Oct 2008
Posts: 218
Likes: 2
From: Austin,tx
the rear is larger than the stock 17, thats what gave me trouble to begin with, and the original reason to do the 30t pulley.
I have found the calculator to figure the ratios, but I am simple minded #s are not very useful.
I am curious on the opinions of those with the 06 that came stock with the 70t.
With the current 30/66 setup its fun but, why not more?
I have found the calculator to figure the ratios, but I am simple minded #s are not very useful.
I am curious on the opinions of those with the 06 that came stock with the 70t.
With the current 30/66 setup its fun but, why not more?
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