needknees
New Member
Yesterday was my first time to the track with actual track tires!
Something isn't quite right.
Info:
Bike - CBR1000RR
Tire - Dunlop D209GPA. Med/soft rear, Med front (Trackday Store super combo special)
Track - MidAmerica Motorplex. 2.2 miles, 14 turns, clockwise.
Rider - intermediate noob.
Weather - ~80F and mostly sunny
Pressures - Started the day 31F/21R cold per Dunlop's suggestion. Hot off the track I was at 35f/27r. I dropped the front down to 34 and rear to 25 hot. After that I had more or less consistent hot pressures of 34f/26r. IIRC Dunlop suggests hot pressures of 34F/24R but don't quote me on that.
This was after only one day at the track, put 104 miles or 47ish laps on them. The front looks pretty good (might want to go down a psi or two???) but the rear isn't looking too hot... what the hell do I need to change?
Right side of rear
Edit: Won't let me post all the pics. Will follow up with the rest.
It doesn't look quite as bad as I thought it did at the track, but :damn:. Is this some kind of hot or cold tear? Rebound issue? I need to watch that OTT Dave Moss video again.
Edit. Watched part of the dave moss video. Sounds like it was a cold tear. Then I found this: http://www.dunlopracing.com/Pressures.pdf . That kinda backs it up. I was running way too high of pressures.
Thoughts or suggestions?
Something isn't quite right.
Info:
Bike - CBR1000RR
Tire - Dunlop D209GPA. Med/soft rear, Med front (Trackday Store super combo special)
Track - MidAmerica Motorplex. 2.2 miles, 14 turns, clockwise.
Rider - intermediate noob.
Weather - ~80F and mostly sunny
Pressures - Started the day 31F/21R cold per Dunlop's suggestion. Hot off the track I was at 35f/27r. I dropped the front down to 34 and rear to 25 hot. After that I had more or less consistent hot pressures of 34f/26r. IIRC Dunlop suggests hot pressures of 34F/24R but don't quote me on that.
This was after only one day at the track, put 104 miles or 47ish laps on them. The front looks pretty good (might want to go down a psi or two???) but the rear isn't looking too hot... what the hell do I need to change?
Right side of rear
Edit: Won't let me post all the pics. Will follow up with the rest.
It doesn't look quite as bad as I thought it did at the track, but :damn:. Is this some kind of hot or cold tear? Rebound issue? I need to watch that OTT Dave Moss video again.
Edit. Watched part of the dave moss video. Sounds like it was a cold tear. Then I found this: http://www.dunlopracing.com/Pressures.pdf . That kinda backs it up. I was running way too high of pressures.
Thoughts or suggestions?