TANK SLAPPER!!!

BISavage said:
Exactly as the title suggests, tank slapper.

After getting the rear end dialed following my fork spring upgrade and fork oil change I went out to test the high speed handling; on the Autobahn. While doing 180 km/h a car went to pass and the wind was enough to provoke a full on tank slapper... at 180 (thats over 100mph) And it lasted forever...I mean I had enough time to think of what I want to do next to try to stop it from slapping.

Long story short, I called Hyperpro and the recommendation came to slide up the forks in the clamps a bit.

Did it, tested it, works.

View attachment 1169
Click to expand...
Apart from the tank slapper how did you find the springs in overall handling and braking?? I am considering them myself.... with a steering damper!
 
Well, the rear shock basically made the bike.
The front springs were an improvement, although I would say that the stock springs may have been ok with different fluid.

Doing another bike, and depending on rider weight, I would really consider just a different fluid up front and then spending the same money as the springs cost to get a preload adjuster for the rear shock.

I dont think a steering damper is necessary for this bike, or anything for the street under a 900cc, even if they look way cool!
 
BISavage said:
Well, the rear shock basically made the bike.
The front springs were an improvement, although I would say that the stock springs may have been ok with different fluid.

Doing another bike, and depending on rider weight, I would really consider just a different fluid up front and then spending the same money as the springs cost to get a preload adjuster for the rear shock.

I dont think a steering damper is necessary for this bike, or anything for the street under a 900cc, even if they look way cool!
Click to expand...
Thanks for the reply, I will play with fluid viscosity and levels before committing to springs then! What rear shock did you settle on??? As for the steering damper... where I live in northern New Zealand the roads are very rough, tight, twisty and bumpy and I plan to ride hard so the damper is going to be an asset considering the cornering speeds and bad roads... :)
 
agusta74 said:
Thanks for the reply, I will play with fluid viscosity and levels before committing to springs then! What rear shock did you settle on??? As for the steering damper... where I live in northern New Zealand the roads are very rough, tight, twisty and bumpy and I plan to ride hard so the damper is going to be an asset considering the cornering speeds and bad roads... :)
Click to expand...

You should start with springs... at least making sure that your sag is in the range associated with your type of riding. The 80:20 rule applies here too. The 20% applies to fluid dynamics (viscosity and air levels). Cheers!
 
You must log in or register to reply here.
Back
Top Bottom