High RPM 70 MPH cruising speed - Harley Davidson Street Forum - Street 500 and 750
User Tag List

 15Likes
Reply
 
LinkBack Thread Tools
post #1 of 24 Old 10-01-2015, 05:55 PM Thread Starter
Member
 
chbart's Avatar
 
Join Date: May 2015
Location: St. Louis, MO
Posts: 37
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
(Thread Starter)
High RPM 70 MPH cruising speed

I noticed my Street 750 rides just a little high on RPM's once I level off at a 70 MPH cruising speed. Since this is the typical speed limit on interstate highways around me, I kinda wish it was a little lower in RPM's like it feels around 55-60 MPH. I figured with that 6th gear and all, this would not be an issue, but it is. I have a TBR slip on muffler, love the sound, esp at the 55-60 MPH speed, (deeper throatier) vs. 70. Wondering if any customization can be done to a smaller 6th gear to accommodate a lower RPM cruising speed without losing anything (power, etc). Not sure if anyone knows, Or also feels what I'm talking about.
chbart is offline  
Sponsored Links
Advertisement
 
post #2 of 24 Old 10-01-2015, 06:29 PM
Member
 
Join Date: Aug 2015
Location: Maine
Posts: 56
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Garage
My wife got her new 2016 750 today
i rode it home
I went on Rte 95 and ran it at 65 and then 70
I didn’t notice the RPMs being to high (no tach but felt fine)
The wind in the chest was tough (needs a windshield)
But the bike rode fine at 65-70

Happy riding...
jsa3107 is offline  
post #3 of 24 Old 10-01-2015, 07:34 PM
Member
 
Crusty Primate's Avatar
 
Join Date: Aug 2014
Location: Hellston, Tejas
Posts: 30
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Honestly, I don't think the RPM's are really winding up until you're past 80. It seems to want to peter out past 90 and slowly makes its way up to 105.

I don't make this a regular practice, but on the occasions I've had a long, empty stretch of road and curiosity, I've given it a shot.

Maybe try getting to 70 in 5th gear and then shifting up to 6th and see if there's a noticeable difference. I've noticed that depending on my shifting pattern (short shifting vs winding the gears out) that the RPMs will be lower at speed in 6th if I actually work my way up to top end starting from 2nd gear onwards.
chbart likes this.
Crusty Primate is offline  
 
post #4 of 24 Old 10-01-2015, 07:44 PM
Senior Member
 
Join Date: May 2015
Posts: 172
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 50 Post(s)
Well if you wind out the gears you will hit 80 in third gear before having to go to 4th, I really havent attempted to peg out the speedo yet but I have gotten it to 100 really quickly
Rock270 likes this.
oandy is offline  
post #5 of 24 Old 10-01-2015, 07:46 PM
Senior Member
 
Join Date: May 2015
Posts: 172
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 50 Post(s)
If I get a phone holder I will see what rpms are at 70mph
chbart likes this.
oandy is offline  
post #6 of 24 Old 10-01-2015, 08:02 PM
Senior Member
 
Join Date: May 2015
Posts: 766
Mentioned: 14 Post(s)
Tagged: 6 Thread(s)
Quoted: 133 Post(s)
these water cooled engines do rev higher than most old school stock v twins


if I remember right, it red lines at 8500 rpm.
that's pretty high for a v twin.


these motors don't like to be lugged like a large v twin air cooled motor. the power band is fairly consistent across the rpm range on these.


maybe it'll take a while to get used to the difference.
AYEDEE likes this.
Rock270 is offline  
post #7 of 24 Old 10-01-2015, 09:11 PM
Member
 
Crusty Primate's Avatar
 
Join Date: Aug 2014
Location: Hellston, Tejas
Posts: 30
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Doesn't the rev limiter kick in somewhere around 8-8100 though? Might depend on mods and fuel mapping. I'm still running stock and would get a nasty surprise when trying to take off from a toll booth and wringing the throttle. About the only time I'd ever wished for a tach.

You're right, you can do 80 in 4th.
Crusty Primate is offline  
post #8 of 24 Old 10-01-2015, 11:31 PM
Senior Member
 
Join Date: May 2015
Posts: 766
Mentioned: 14 Post(s)
Tagged: 6 Thread(s)
Quoted: 133 Post(s)
Quote:
Originally Posted by Crusty Primate View Post
Doesn't the rev limiter kick in somewhere around 8-8100 though? Might depend on mods and fuel mapping. I'm still running stock and would get a nasty surprise when trying to take off from a toll booth and wringing the throttle. About the only time I'd ever wished for a tach.

You're right, you can do 80 in 4th.

yeah, I don't know at what rpm's the limiter kicks in, but I'm sure some one here knows.....I have hit the limiter on mine a few times momentarily.


one thing I do know is that from a red light taking off pretty hard and high revving the engine through the gears it doesn't take long to hit 100 mph
AYEDEE likes this.
Rock270 is offline  
post #9 of 24 Old 10-02-2015, 09:43 AM Thread Starter
Member
 
chbart's Avatar
 
Join Date: May 2015
Location: St. Louis, MO
Posts: 37
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
(Thread Starter)
Yeah, I have no problem getting to 80+ speeds and all, it just seemed to be a little "high pitched" when I wanted to "level off" & "cruise" at a steady 70 mph, where I wish it was a little lower in rpm. In credibility to what everyone is saying here, your absolutely right - once at that leveled off 70 mph, when i get on it from there, whether 5th or 6th, it takes off no problem even getting up to 100. It could be the perfect receipt "pitch" (70 mph speed, rpm, with helmet covering my ears, with my TBR slip-on) - it could just be my slip-on, the way its producing sound, maybe a higher pitched sound on 70 mph leveling off the throttle.... as the more I think about it, once I get on it again from 70, the sound drops a little deeper. Oh - and I can tell you I found rev limiter at 90 mph in 5th..
chbart is offline  
post #10 of 24 Old 10-03-2015, 09:39 AM
Senior Member
 
Join Date: May 2015
Posts: 766
Mentioned: 14 Post(s)
Tagged: 6 Thread(s)
Quoted: 133 Post(s)
the loose cannon I have on mine also has a higher pitch to the sound at higher speed freeway riding.


.... it may just be the nature of a water cooled engine vs a large air cooled v twin.
Rock270 is offline  
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Vance & HINES Fuelpack FP3 rpm/gear indicator simon112 Street Appearance & Modifications 62 02-27-2018 07:52 PM
High Frequency HandleBar vibration mods? Epijay Harley-Davidson Street General Discussion 5 09-10-2015 06:07 PM
Love to take the Vrod Cruising!!! bbally Other Harley-Davidson Motorcycles 8 05-23-2014 12:52 PM
Wife and I cruising bbally Ride Reports 2 04-18-2014 12:14 PM
New member from the high desert Desert Tortoise New Members Introduction 2 02-05-2014 02:40 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome