SuzukiSavage.com - Top speed observations

MMRanch Serious Thumper Offline Evil flourishes if Good Men do Nothing. Posts: 5837 LYNCHBURG TN Gender:	Re: Top speed observations Reply #15 - 07/26/17 at 11:19:34 Yea , to what SpringMan Said ... That's the same conversation that I have had .
Back to top	I see and feel the Holy Spirit in the world , as does anybody who has eyes to see. IP Logged

Eegore Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 8343	Re: Top speed observations Reply #16 - 07/26/17 at 14:38:09 I'm not using the bike to record speed, I am using a GPS and a tripod mounted radar so the speed indications should be considered very accurate.
Back to top	IP Logged

justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Top speed observations Reply #17 - 07/26/17 at 14:57:39 justin_o_guy2 wrote on 07/25/17 at 12:01:30: circumference. You may find a faster top speed in 4th gear. That's something to look at.
Back to top	The people never give up their liberties but under some delusion.- Edmund Burke. IP Logged

Dave

YaBB Moderator
ModSquad

Offline

SuzukiSavage.com
Rocks!

Posts: 18101
Camp Springs, Kentucky
Gender: male

Re: Top speed observations
Reply #18 - 07/27/17 at 04:25:30

justin_o_guy2 wrote on 07/25/17 at 12:01:30:

circumference. You may find a faster top speed in 4th gear.

That's something to look at.

What JOG is saying in his shorthand post - is the larger tire may be putting the engine in a place where it cannot get enough rpm to develop the HP needed to go faster. Does the bike go faster in the next lower gear?

Back to top

Someday I will be old......But not today!

IP Logged

Eegore

Serious Thumper

Offline

SuzukiSavage.com
Rocks!

Posts: 8343

Re: Top speed observations
Reply #19 - 07/27/17 at 20:55:19

Ok I took that particular bike out and the one with the 150 tire shows zero response when upshifted to 5th gear.

It caps out today at 54mph in 4th, and a change into 5th gear yields zero change in speed or from what we can tell RPMs. Both people that have been riding this bike have stated previously that they cant tell that there even is a 5th gear besides the fact that the foot shifter responds to another up-tick gear change.

It may be the tire. Once I run through two more 150 tires, if the bike doesn't catastrophically fail, I will try a stock 140 and see if there's a change.

Back to top

IP Logged

verslagen1 YaBB Moderator ModSquad Online Where there's a will, I want to be in it. Posts: 28886 L.A. California Gender:	Re: Top speed observations Reply #20 - 07/27/17 at 21:55:13 Eegore wrote on 07/27/17 at 20:55:19: It caps out today at 54mph in 4th, and a change into 5th gear yields zero change in speed or from what we can tell RPMs. Who rebuilt it for you? most likely the cam is off a tooth.
Back to top	Versey's Place Tech Section Index IP Logged

justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Top speed observations Reply #21 - 07/27/17 at 22:30:55 What if someone adjusted the valves on exhaust?
Back to top	The people never give up their liberties but under some delusion.- Edmund Burke. IP Logged

Dave

YaBB Moderator
ModSquad

Offline

SuzukiSavage.com
Rocks!

Posts: 18101
Camp Springs, Kentucky
Gender: male

Re: Top speed observations
Reply #22 - 07/28/17 at 03:26:57

Eegore wrote on 07/27/17 at 20:55:19:

It may be the tire. Once I run through two more 150 tires, if the bike doesn't catastrophically fail, I will try a stock 140 and see if there's a change.

The stock 140/80-15 tire is only available from IRC, and it is a mediocre tire.

It really doesn't sound like you engine is making the power it should, as 4th gear should overcome any issue with a tire that is making the gearing too tall and you should be able to reach 70 - 80 mph in "one" of the gears.

If you want to keep the big/bold/bobber look - get a 140/90-15, if you want to get the most performance and a tire almost identical to the stock size - get a 130/90-15. If your bike can't go 80-85 with either of those sizes.....it is not the tire.

Back to top

Someday I will be old......But not today!

IP Logged

SALB

Serious Thumper

Offline

FSO

Posts: 668
Whittier, AK
Gender: male

Re: Top speed observations
Reply #23 - 07/28/17 at 11:16:50

Eegore wrote on 07/27/17 at 20:55:19:

It may be the tire. Once I run through two more 150 tires, if the bike doesn't catastrophically fail, I will try a stock 140 and see if there's a change.

I ran a 150/90 on the last S40 I had for about a year. After fixing the clearance issues, it would do 90 mph, but took forever to get there. I had to plan to pass cars at highway speeds, and handling was atrocious. If it will only hit 54, look elsewhere. Wink

Back to top

IP Logged

Eegore Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 8343	Re: Top speed observations Reply #24 - 07/28/17 at 14:51:28 Just to clarify, I was thinking that having no change in performance from 4th-5th gear was perhaps the tire. The fact that the bike is reducing in speed each week is something else, I assume it will be scrap by winter.
Back to top	IP Logged

verslagen1 YaBB Moderator ModSquad Online Where there's a will, I want to be in it. Posts: 28886 L.A. California Gender:	Re: Top speed observations Reply #25 - 07/28/17 at 14:53:35 verslagen1 wrote on 07/27/17 at 21:55:13: Eegore wrote on 07/27/17 at 20:55:19: It caps out today at 54mph in 4th, and a change into 5th gear yields zero change in speed or from what we can tell RPMs. Who rebuilt it for you? most likely the cam is off a tooth.
Back to top	Versey's Place Tech Section Index IP Logged

Eegore Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 8343	Re: Top speed observations Reply #26 - 07/28/17 at 16:31:25 A local mechanic did the bearings/pulleys etc.
Back to top	IP Logged

justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Top speed observations Reply #27 - 07/28/17 at 17:19:05 First, check valves.
Back to top	The people never give up their liberties but under some delusion.- Edmund Burke. IP Logged

verslagen1 YaBB Moderator ModSquad Online Where there's a will, I want to be in it. Posts: 28886 L.A. California Gender:	Re: Top speed observations Reply #28 - 07/28/17 at 18:33:29 Eegore wrote on 07/28/17 at 16:31:25: A local mechanic did the bearings/pulleys etc. did he split the case?
Back to top	Versey's Place Tech Section Index IP Logged

justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Top speed observations Reply #29 - 07/28/17 at 18:51:35 I think it's the one that got output shaft bearings. I don't understand the continuing decrease in power. Maybe the slide is sticking?
Back to top	The people never give up their liberties but under some delusion.- Edmund Burke. IP Logged