no, not on my monster, but please help anyway...
so, this is my problem (today) I have an 08 Husky smr510. I love it. I've had no suspension issues at all, and have not touched the settings until now, but the bike has worked great! Burned pretty quickly through the OEM Dunlop rubber on the rear. I changed it to a contiforce SM tire. Since I've done that I get a high speed wobble when I'm up around 70-80 with throttle pinned. It's enough of a wobble that it freaks out my friends behind me. I let off the gas and it goes away. This sucks as I've really been enjoying hunting down sportbikes, but if I have to back off at high speeds...I lose them.
What I've tried:
- moving back on the seat - this helps quite a bit, but I didn't have to do that before, so I'd rather not. more weight up front makes it worse
- adding rear compression damping - makes it worse. removing it makes it a bit better but doesn't fix it.
- dropping forks in triples by 3-4 mil. - this helped, but still didn't fix it.
- I'm running 24PSI front and back
I don't believe there is a ride height adjust on my bike, but not totally sure.
Help please!!! and Thanks in advance
Try 30 PSI in the front, 32 in the rear.
Go over to supermotojunkie.com Been discussed plenty. I raced a 450 KTM for a bit and went through some of the same. Had a friend that raced the Husky 510 but I don't recall him having that issue. A number of factors can contribute to head shake, but it's usually in the setup. Check the steering stem bearings for too tight or too loose. Also, make sure you relax and don't have the "death grip". Does it shake the head coming out of corners, on the gas? When you're on the gas, the rear drops, and the front unloads, causing the trail to change, while losing weight on the front tire.
Oh, and 30/32 is a bit much for that light bike. I run 20/21 with slicks (varies depending on which tires) and maybe 25/27 on street tires.
this is the second thread i've heard about someone changing out the rear tire only for a different brand than the front and having handling problems.
could it be such an issue to use different brand tires front and bike?
Went back and edited a couple of my thoughts in my post, must have been drinking [drink] And I guess I didn't think enough about it, but when you say wobble, do you mean in the rear wheel, or in the bars (headshake)? I just assumed the latter.
thanks, still trying to sort it out. It only happens WOT at about 80mph or so... but then I have to back off to make it stop.
Umm, is the new tyre balanced right?
that sounds like a dumb question but it's true.
i had a car that worked great at normal speeds, but once i hit triple digits he had a horrible shake.
i found a tire shop that can balance at 110 mph. the normal balancers i think go up to 55 mph spins.
not sure if that's the best technical description, but as the speed goes up so does any balance problems.
I owned a KLR 650 once and heard this quite often on the boards. I would get the front end shaking pretty good over 80mph when passing on the highway.
solution? let go of the handlebar on one side. :o
The wind at that speed transfers unwanted input into the chassis through, you guessed it YOU.
Now this has worked for me many times on bikes (monsters with wide bars as well) when you get it up to speed just as it starts let up your grip on one side grabbing the tank with your knees. lighten up a little at a time and you will see if is going to help. When you are back on the seat you have less leverage on the bars = less input.
Test it at your own risk, your bike may be screwed up too. ;)
i did notice on my cold ride yesterday that when i grabbed the tank hard with my legs (which apparently were shivering) i did induce a bit of a speed wobble. i just let loose a bit, problem fixed.
but honestly i don't think either of these situations apply to the OP.
Check the balance of the rear tire (and make sure the tolerances of the balancer are very low)
I doubt it is balance related as that usually shows up as hop at two speeds
35mph and about 70mph
Short wheel balance lesson:
static balance - equal weight distribution around the circumference of the tire/wheel assembly
static unbalance will cause the wheel to move in the vertical plane (hop)
dynamic balance - Equal weight distribution on each side of the vertical centerline of the tire/wheel assembly
dynamic unbalance will cause the wheel to move from side to side, or wobble
The purpose of a "speed balance" is to measure both imbalances during rotation and use a minimum amount of weight to correct. The new fangled computerized wheel balancers use Piezioelectric sensors to do this. For some reason that is beyond me, in spite of the increasing width of motorcycle wheels and tires, dynamic imbalance doesn't seem to be a problem on motorcycle tires. Static balancing seems to work fine for race teams.
Back to your wobble. I looked at Michelin's UK site. The closest bike they had to the bike in question is listed below and agrees with my recommendation.
http://two-wheels.michelin.com/2w/front/TyreSelector?lang=EN&cd_pays=2e30&cd_marque=4f424343&cd_modele=4a484c4f434a&cd_cylindree=4a48424f4949&cd_annee=4a4f43494f43 (http://two-wheels.michelin.com/2w/front/TyreSelector?lang=EN&cd_pays=2e30&cd_marque=4f424343&cd_modele=4a484c4f434a&cd_cylindree=4a48424f4949&cd_annee=4a4f43494f43)
Your choice :
United Kingdom
HUSQVARNA
SMR 510
510.0
2005
> Change my choice
Michelin propose you the following products in motorcycle range :
PILOT POWER Front
PILOT POWER Rear
Front
Sizes :
120/70 ZR 17 (58 W) TL
Pression :
2.0 bars
Rear
Sizes :
150/60 ZR 17 (66 W) TL
Pression :
2.2 bars
For more advices, ask your dealer
It would certainly be easy to up the tire pressure a couple of PSI at a time and see what happens. You might also want to check the wheel for run out. A ham fisted installer could have bent it.
Thanks for everyone's advice. i have a bunch of things to try out from more rear rebound damping to different tire pressures. Unfortunately it just started to rain in SF today so my experiments will have to wait until the weather improves.
I don't know for sure if the wheel was balanced properly, but it does have weights on it that weren't there before, so that make sme think they went to the trouble of balancing. They might not have done it perfect, but they went through some process.