Two Clicks Out 11 WERA Expert Gets Some Help Part 1

[@catalystreactionsbw]

Yes, the ideal gain is 5-7psi at the track. Pressure must be taken after 5 - 6 laps, and the in lap must be at full speed. That gain normally suggests that the carcass temp is close to optimum. Sometimes you might only gain 5psi due to to ambient and track temps. That's okay. Dave Moss Host

[@marcosgarcia11084]

Dave moss, you are a MASTER

[@DevInvest]

My grandfather, father, uncles.. all raced which means- I raced.. They were all excellent- championship riders. Not me.. lol But one thing we ALL DID.. is we logged our bikes.. each bike had a journal- just those silly college composition type 📓 books.. Simple ruled columns for psi / oil level / CHAIN TENSION/ and we logged at the beginning of the day before we rode then when we got home & washed the bikes we checked for any obvious broken items and then logged the fluids and pressures, cables etc Even for a little boy,,like I was at the time, I did it! I loved it! I only measured the tire psi and oil,,, but it built a habit. My grandfather- I learned later- had ALL the settings, sag, preload etc on the front inside cover on 3x5 cards he had put clear tape over to protect from moisture.. Sounds OCD but it's NOT! It's your life! Plus, when you go visit a professional tuner like a Dave,, you take the logbook with ya!

[@catalystreactionsbw]

Thanks for sharing your family and experiences from being a child. There are clear reasons why all made it to a very high level.

[@timtripp4222]

Can you please till your Dad, I am available for adoption!

[@seanadamson280]

Dave super knowledge 👍

[@TreeK7]

would i still want 5-7 lbs hot gain on street/track tires when i get off the track??

[@daytonasayswhat9333]

Yes.

[@spotthedogg]

I'm confused, why would an underinflated tire cold tear?

[@raynic1173]

Let me take a crack at it; this my take on it and any confirmation or opinions would be welcomed. First off you have to be careful to distinguish between hot and cold temp/pressures... a tire has an ideal range of temperature and pressure, what the cold starting point is greatly affects what it final hot pressure will be. So, in some cases I've seen dave talking about, was the hot temp., the out on the track, under stress condition was to cold or under inflated. In this case the tire could not get to higher ideal temps./pressure because the starting pressure was actually to high. When the cold press. being high the contact patch is small and will not cause as much friction and hence will not raise the temp and raise that pressure. It seems a bit counter intuitive, but, if we start will a lower pressure the contact patch is greater, the friction is greater and the tire will continue to heat up beyond the previous example. So just to have numbers, arbitrary numbers, a tire that develops cold tear, may start at 24 psi and heat up to 26 psi at 140 degrees. where a proper set up would start at 22 psi and heat up to 28 psi at 180 degrees. The tire that developed the cold tear never was able to get up to a high enough operating temp. through out the carcass thickness. So when providing grip it will actually chew or tear the rubber surface because it's being over stressed. Hence the term 'cold tear'. Again, that's my take on it.

[@petar-boshnakov]

Hi Dave, can you please clarify 5.43 to 6.30 part a little. In this particular case: when he applies the brakes at the lean the front should drop smoothly or with the wobbly motion you describe? Then for a bumpy track you want looser rebound so the fork can expand and the tire follow the surface maybe looser compression but set up to not bottom according to rider style. In his case the front is too loose on the rebound but but too stiff on compression?? Is that right? So in essence you are having less compression and a bit more rebound in this case? Im asking because I got a little confused as you are discussing both types of behavior in the vid. Thanks a lot

[@catalystreactionsbw]

You are correct in your understanding an explanation. Faster rebound for bumpy tracks to keeps the tire on the ground but the downside is longer braking to keep the forks under control in braking.

[@petar-boshnakov]

Thanks a lot Dave, that's really helpful

[@rudranauth.persaud6248]

He is not 195. Lol.