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Buell Motorcycle Forum » Buell RACING & More » Racing - Circuit/Road Racing » Archive through November 05, 2008 » Tires questions « Previous Next »

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Alessio66xb12r
Posted on Monday, August 11, 2008 - 08:47 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

as i'm doing practice to lower my lap-time i noticed a strange rear tire consuming
like pieces of rubber braking away from the tire.
my guess was to much heavy rear spring so i changed for a 20 kgs softer . the next practice day the bike did the same....
maybe less air-pressure needed....????
another point : during one "fast" lap my engine turned off , like gasoline finished but the tank was half/full. when at home i connected to the pc to see the ecmspy diagnostic but no failures were indicated in the errors list and history.anyway when i was waiting to be rescued i tried to turn on the bike and it worked fine until the end of the sessions day
last question :
is it possible that on track spark plugs color is whiter, when checked, respect the normal street use ?
i ask you this because i'm sure to run a little beat rich to keep the engine cooler and i can see this from the fan ( it does'nt works a lot) from the overtemp. light that never turned on ....but when yesterday i had a look to the spark plugs they were white on the electrod and black at the base ( i used screaming eagle snake tong electrod), now i changed to ngk again .
any help or comment will be appreciated
i'll give you some pics of those days.
bye Alessio

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Alessio66xb12r
Posted on Monday, August 11, 2008 - 08:52 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

local cow-boys on their R1s



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Alessio66xb12r
Posted on Monday, August 11, 2008 - 08:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

but no R1 is so.....
SO NICE !!!



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Alessio66xb12r
Posted on Monday, August 11, 2008 - 09:00 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

some more



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Alessio66xb12r
Posted on Monday, August 11, 2008 - 09:03 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Misano Circuit



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Alessio66xb12r
Posted on Monday, August 11, 2008 - 09:06 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

again
bye Alessio





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Rocketsprink
Posted on Monday, August 11, 2008 - 05:19 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Tires could be "cold tearing". Also, the tire reps here in the states say check tire pressure when they're HOT and keep them on the warmers for 1&1/2 hours before going out. That's directly from the Pirelli rep.
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Alessio66xb12r
Posted on Monday, August 11, 2008 - 05:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

thank you
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Schmitty
Posted on Tuesday, August 12, 2008 - 06:09 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Your tires should be on the warmers until the rim is warm to the touch. The engine turning off can happen during a hard braking situation. The fuel shifts forward in the frame and momentarily starves the fuel pump causing the stutter. I had it happen to me twice into turn one at Road America.

Schmitty
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Eboos
Posted on Tuesday, August 12, 2008 - 08:12 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The engine turning off can happen during a hard braking situation. The fuel shifts forward in the frame and momentarily starves the fuel pump causing the stutter. I had it happen to me twice into turn one at Road America.

Could you put anti sloshing foam in the tank on an XB? I have it in my M2, but I didn't know if you could work it down in the XB's frame.
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Alessio66xb12r
Posted on Tuesday, August 12, 2008 - 11:09 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

thank you for your inputs
a lot of things need to be adjusted (rider weight first of all), if sometimes the bike is out of gasoline i'm often out of oxygen and this is a big point....it mean more sport less drinks less cigarettes ....a long list in my case but i'm working at
don't know when ..i want to race this Buell
bye Alessio
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