High speed wobble !

[Mek5o]

What can any one tell me about what can cause high speed wobble? What i should be checking and how i can determine if its from front or rear ? it seems tome its in front but I work on cars for a living not bikes Lol !

[Gorilla]

First check the neck bearing nut. torque to 40 lbs. If it is to loose you will get wobble.

[Lee H. Mann]

What can any one tell me about what can cause high speed wobble? What i should be checking and how i can determine if its from front or rear ? it seems tome its in front but I work on cars for a living not bikes Lol !

Check your tire air pressures first.

18-20 psi rear and 36 psi front.

Your C-50 only weighs a little over 800 lbs.

Then take it for a ride.

In a C-50 some headshake is normal, usually below 20mph.

High speed shake (55-65mph) is usually wheel balance.

Since you have 2 wheels on the back, twice the odds one of them is out of balance.

Another suggestion to make it easier for you and others is to continue posting in the same thread you started originally so that all of the solutions and homework is in one place.

[tfdeputydawg]

Check your tire air pressures first.

18-20 psi rear and 26 psi front.

Your C-50 only weighs a little over 800 lbs.

Then take it for a ride.

In a C-50 some headshake is normal, usually below 20mph.

High speed shake (55-65mph) is usually wheel balance.

Since you have 2 wheels on the back, twice the odds one of them is out of balance.

Another suggestion to make it easier for you and others is to continue posting in the same thread you started originally so that all of the solutions and homework is in one place.

Do you really mean 26psi in the front?

[Lee H. Mann]

Do you really mean 26psi in the front?

tfdeputydawg

Thanks, I changed it.

Good thing one of us is on their toes !

[Mek5o]

tfdeputydawg

Thanks, I changed it.

Good thing one of us is on their toes !

So you are saying lower it ? Also what’s a c-50 ?

[Mek5o]

Thanks for the info, adjusted a few things and WOW ! ! It rides like a dream.........not a sign of head shake or wobble up to 90mph !

[Gorilla]

Thanks for the info, adjusted a few things and WOW ! ! It rides like a dream.........not a sign of head shake or wobble up to 90mph !

for others benefit can you advise what you did please?

[Mek5o]

for others benefit can you advise what you did please?

Adjusted all tire pressure front to 26 psi rear to 19 psi. Also rechecked front stem adjustment found it to be to lose, in the neck, made that adjustment as well from 1/4 to 1 3/4. now it rides like a dream. Sweet and smooth !

[CrystalPistol]

Adjusted all tire pressure front to 26 psi rear to 19 psi. Also rechecked front stem adjustment found it to be to lose.

Now try it at 36 psi in front and 18-20 in rear.

[nucseal]

Adjusted all tire pressure front to 26 psi rear to 19 psi. Also rechecked front stem adjustment found it to be to lose.

Tire pressure way to low! Do what Les says at minimum, then you won't have a chance of peeling a tire off the rim in a turn. I run 40 front and 22 back!

[Jack Klarich]

Tire pressure way to low! Do what Les says at minimum, then you won't have a chance of peeling a tire off the rim in a turn. I run 40 front and 22 back!

I agree, nothing worse than a rim cut tire

[Mek5o]

Now try it at 36 psi in front and 18-20 in rear.

Sorry, after making those last adjustments it was great. should have explained better. just edited the post to clarify.