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-   -   Calculating RPM's without a tach (http://www.doofclenas.com/forums/showthread.php?t=135127)

GrayRider 01-28-2008 11:53 AM

Calculating RPM's without a tach
 
Click here, fill in the blanks and the calculations will be done for you.

dynageno 01-28-2008 11:54 AM

Cool, now if I just knew how many teeth on the sprockets:blink:

Stone Cold 01-28-2008 02:40 PM

Quote:

Originally Posted by dynageno (Post 265031)
Cool, now if I just knew how many teeth on the sprockets:blink:

If you were in West Virginia, it would be easy.

One, singular...tooth...

Just sayin'...

Highmiles 01-28-2008 04:17 PM

Quote:

Originally Posted by GrayRider (Post 265030)
Click here, fill in the blanks and the calculations will be done for you.

I tried doing the calculations today on my trip to the city, but every time I took my hand off the throttle to work the calculator, my speed changed. :blink:

thrasher 01-28-2008 04:42 PM

Quote:

Originally Posted by dynageno (Post 265031)
Cool, now if I just knew how many teeth on the sprockets:blink:

If its stock primary gearing, look in your parts book and get the part number. Plug the part number into Zanotti's HD online parts or Chicago HD online parts pages and it may have the tooth count in the description. Or you could always just pull the outer primary cover and have a look. :D

Rock 01-28-2008 06:56 PM

Gray...thanks for the no help.

Berserker 01-28-2008 06:59 PM

I have an excel spreadsheet, I was given. If anyone is interested. PM and I will email.

Road Glider 01-28-2008 07:13 PM

If you are going 70 mph on a 2006 or earlier twin cam you are at 3000 rpms. That is all you need to know about rpms.

Well maybe one more thing. If you twist the throtle on a 2006 or earlier twin cam and it starts to cut off you need to shift to a higher gear.

That is all.

Rock 01-28-2008 07:15 PM

Quote:

Originally Posted by Road Glider (Post 265287)
If you are going 70 mph on a 2006 or earlier twin cam you are at 3000 rpms. That is all you need to know about rpms.

Well maybe one more thing. If you twist the throtle on a 2006 or earlier twin cam and it starts to cut off you need to shift to a higher gear.

That is all.


A 2:1 eliminates the need to shift to a higher gear on the 2006 and older models. :DD

Berserker 01-28-2008 07:15 PM

Quote:

Originally Posted by Road Glider (Post 265287)
Well maybe one more thing. If you twist the throtle on a 2006 or earlier twin cam and it starts to cut off you need to shift to a higher gear.

That is all.

Theres a rev limiter in 07s too. I bumped mine a little but not to 6200. Your mostly likely out of tq curve, and just motor can do it, doesn't mean its great for it.

475wildey 01-28-2008 07:17 PM

Quote:

Originally Posted by GrayRider (Post 265030)
Click here, fill in the blanks and the calculations will be done for you.

is there a way to use this while ridding my bike in a snow and hail storm

Rock 01-28-2008 07:17 PM

So are you saying all those guys who say their Harley's can do 150mph is lying? :roflback:

475wildey 01-28-2008 07:18 PM

Quote:

Originally Posted by Rock (Post 265299)
So are you saying all those guys who say their Harley's can do 150mph is lying? :roflback:

is or are

Rock 01-28-2008 07:22 PM

"Burger King moto"

Thorns 04-07-2008 10:49 PM

I can do the math, but it's easier to look at the tach. :doh:

Thorns


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