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Old 01-25-2008, 05:27 PM   #352 (permalink)
whittlebeast
Seasoned Rider
 
Join Date: Jan 2007
Location: St Louis
Posts: 89
whittlebeast is on a distinguished road
Quote:
Originally Posted by kelly View Post
Whittlebeast--I think I'm tracking on your thought about the amount of VE at slightly ABOVE the idle. Here's my thought on why that wall is there--the bike is already moving and most operators instictively go to 0% throttle during shift (not all, but most street riders). Can't really compare an autos drop in RPMS (800) to a 2 cylinder motor while shifting as most street riders drop about 1500RPMs before they get the scooter shifted (about .4 to .8 of a second the motor decels).

Now, there are many exceptions on this forum--heck, Tote and Taz GAIN 800RPMs on the shift when they pilot down the 1/4 (one of these days you will find that stronger clutch plate fellas---one day--second thought you both are thrashing transmissions already)!

Whittlebeast, my question to you is, is that graph you posted a result of data collected from the MAP currently in your bike and then if it is, do you experience the decel pop-pop-pop and then a roll on the throttle with hold on acceleration? Just a fleeting thought on my part.
....
Most shifts on the street are in the 0-30% throttle and 3500 RPM droping down to 2800 RPM so this "wall" is not even in the normal operating range.

Remember I have a Sporty, so I think of 3500 to 2800 RPM range normal. I would think a big twin would be somewhat less RPM stock. I have never been on a BT with a tach.

AW

Last edited by whittlebeast : 01-25-2008 at 06:00 PM.
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