RCinNC
Well-Known Member
They must make it a real adventure when you have to thread your way between objects. Lane splitting would be a real heart-stopper.
Do hard cases cause instability?
- Thread starter AZPI
- Start date
WJBertrand
Ventura Highway
While it's true that the 804/805's have a maximum pressure rating of 33 PSI, the 705s however have a maximum pressure rating of 42 PSI, same as the OEM tires.scott123007 said:
https://www.shinkotireusa.com/product/705-series/211929
scott123007
Well-Known Member
WJBertrand said:
WJBertrand
Ventura Highway
scott123007 said:
jackintherok
Member
Yep my standard pizza boxes (there's a note in them ... Do not exceed 85 mph with these bags on ... and other stuff) like made you feel there's not enough weight on the front end (at 80+). But rear tire pressure increase (technician at Yamaha told me use 39/40 instead of 36 psi in the back with bags on) ... and it worked some (running at 33 psi on the back did definitely not work on one blustery day), rear tire make (the old BWings on the new bike needed 40 psi with bags (maybe due to soft side walls), Pilot Road 3 and 4 were a lot better, now Battle axe Adventure X40R seems every bit as good as the P. Road 4, Michelin Anakee 3 had low traction ... open up out of bends and you start drifting at uncomfortable speeds, but offers another way of taking corners), the high screen supplied as an accessory (replaced it with the standard screen .. big difference), as mentioned blustery conditions (with bags the bike don't like them), the rider (I rode sports bikes and a Vmax before the S10 and they are much firmer up front)... I was holding the bars too tightly and a few sessions with finger-like contact in blustery conditions and making an effort not to correct made things a lot better. If I had to put them in order I'd say ... rider> the high screen>rear tire pressure>tire type... all can make life interesting in blustery/high speed conditions. Now I only exceed 85 with the pizza boxes, little wind and spider senses on 'max'. I am now running (with bags) at 33 front 38 psi rear, standard screen, Battle Axe Adventure rear (still Pilot Road 4 front), and that's OK. Without boxes different bike ... 120 no problem.
AZPI
Member
Very interesting thank you!jackintherok said:
jackintherok said:
The Tenere manual specifies 33-F/36-R for loads below 198lbs. It changes to 42-R when load exceeds 198lbs. (front tire pressure remains the same) Of course, those pressures are for OE BW tires. I will have to experiment when the A41s get mounted; starting with the OE pressures. I generally don't go much faster than 80mph with the bags mounted; I can tell how much they hang out in the wind by the amount of bugs on the fronts of them. ::001::
raynchk
Member
I'm fine to about 110-115 indicated mph, then front wheel wants to wobble a bit. Was thinking about taking OEM bags off and seeing if wobble was still there, but haven't done it yet.
jwhuls
Always looking for adventure
I have maxed out speed fully loaded as well with no issues.
Ramseybella
Well-Known Member
804/805 Shinko Tractor tires high speed + Mondo Condo bags?
I run the 705 tires rear was always kept at 40 psi took the suggestion up it to 42 psi always keep the front 21" at 40 psi..
Big difference tire wear is even across the tire dipping into turns way better.
Low psi with a load will make anything with wheels twitchy, also the front wheel is being pulled up by the weight of the rear load, especially that far back.
I made a big platform all the way on the tail like your top case to hold my gear around 50 to 65 pounds of stuff not including the weight in my side cases. I noticed moving my heavy 90 Liter bag to the rear seat more centered made a big difference.
But that's just me.
Maybe slow down, 85 to 95 is fast enough for this bike on the interstate. The only time i run this bike above 100 is when i am in a high cross wind situation.
I run the 705 tires rear was always kept at 40 psi took the suggestion up it to 42 psi always keep the front 21" at 40 psi..
Big difference tire wear is even across the tire dipping into turns way better.
Low psi with a load will make anything with wheels twitchy, also the front wheel is being pulled up by the weight of the rear load, especially that far back.
I made a big platform all the way on the tail like your top case to hold my gear around 50 to 65 pounds of stuff not including the weight in my side cases. I noticed moving my heavy 90 Liter bag to the rear seat more centered made a big difference.
But that's just me.
Maybe slow down, 85 to 95 is fast enough for this bike on the interstate. The only time i run this bike above 100 is when i am in a high cross wind situation.
Arkyrider
Active Member
No issues with HOLAN PRO NOMADA bags even running 2 up, with travel gear @ 80 - 85 mph. No issues running single @ 90 - 95.
Madhatter
Well-Known Member
at the risk of running down a rabbit hole, Ramsbella please explain extra high speed to deal with severe cross winds.... ive got to know.... I'm not troubled by cross winds as I adjust my speed to suit , just never thought busting a ton was the way to go...
Nikolajsen
"Keep it simple"
More wind pressure from front, help stability.
Thats also why modern cars are more sensitive for crosswind, because of the lower aerodynamic drag
Thats also why modern cars are more sensitive for crosswind, because of the lower aerodynamic drag
Nikolajsen
"Keep it simple"
Well....yes...but it of course also depends on how the rest of the car is built 
) )
) )
Ramseybella
Well-Known Member
Nikolajsen summed it up.. I never looked at it that way but after watching a tractor trailer leaning over and shifting sideways in front of me on I25 north of T or C i gunned the throttle passed the truck and realized i wasn't taking as much of a beating.. I pulled over a few miles ahead and discussed this with my friend that was riding with me on his 2000 kawasaki concours. He was wondering why i started hitting 110 and he agreed it helped. April is around the corner high wind month..Madhatter said:
Heading down to Alamogordo this week it should be windy heading south.
Madhatter
Well-Known Member
I guess velocity of your bike over came the velocity of the cross wind , maybe that trucker should have punched it...... Mr. Highway Patrolman says , Sir do you no how fast your going ? rider says yes sir I do and here is why. Mr. Highway Patrol man says ,please turn around and put your hands behind your back..... not saying it doesn't work cause I have not tried it myself ( other than run it up to 80 which is the limit on the toll outside of Austin , and it didn't seem to help , didn't have the guts to try the ton.) riding in high wind is a challenge , one should not be afraid ,just careful...... a tall top box set up can add to the instability that cross winds impart ( makes it a sail ).... so we are back on topic...
Ramseybella
Well-Known Member
Hey you asked!! HP in New Mexico are spread thin. Only see them in a cluster when they need to make their quota for the month.Madhatter said:
It's the county Sheriffs one needs to pay attention to total prick's, that's another sad but that's another story for the Rabbit hole.
Yes back to the topic. I tend to stick to smaller bags to avoid temptation to take more Crap you don't need, if you need it get soft top bags.
You're overthinking it.
The 25" OD of the tire on a 19" wheel diameter calculates to be about 13.5 rpm/mph. The tire alone is 16 pounds, and then the weight of the wheel is added in. Spinning at 70 mph, the 19" front wheel is at (70*13.5=) 945 rpm. That's a LOT of torque and you have two of them.
Increase the speed to 105 and you've increased the force of those big gyroscopic stabilizers by roughly half again.
(For those who want to be exact, note the weasel word "roughly" 'cuz I'm doing this off the top of my head.)
This dynamic stability of wheels and discussion of crosswinds are totally different subjects than the OP's "Do hard cases cause instability?"
The 25" OD of the tire on a 19" wheel diameter calculates to be about 13.5 rpm/mph. The tire alone is 16 pounds, and then the weight of the wheel is added in. Spinning at 70 mph, the 19" front wheel is at (70*13.5=) 945 rpm. That's a LOT of torque and you have two of them.
Increase the speed to 105 and you've increased the force of those big gyroscopic stabilizers by roughly half again.
(For those who want to be exact, note the weasel word "roughly" 'cuz I'm doing this off the top of my head.)
This dynamic stability of wheels and discussion of crosswinds are totally different subjects than the OP's "Do hard cases cause instability?"