12r trackday pressures

[Shifty]

Hey guys

12R normally gets 38/40psi, although been using 42 as I haven't been riding it a lot on my good behaviour license which means I can get away without checking the tyres ever single time I start it.

Trackday suggestions? I'm a beginner so won't be setting any lap records, but it's a high-speed track so the rear will get a workout out of corners and the front will get hammered under brakes and I reckon they'll be hot as shit Suggestions on pressures?

I'm running BT015 one end and a BT016 the other... not sure which is which but they're much the same tyre anyway.

[Smitty]

try dropping 6psi both ends
and see how it goes (the first lap will be squishy)

then go up or down a few psi at a time..til you are
comfortable and so is the bike..tracking true
and holding its line in corners

hth

Smitty

[Lone Wolf]

No idea about the 12R or the tyres, but I always start with 30/30 on the 7R and work from there

[robracer]

On the bridgies in summer I would run 34 - 36 cold front & Rear
In winter I drop that to 26 - 28 cold, to get more heat in the tyres

[Gosling1]

.....On the bridgies in summer I would run 34 - 36 cold front & Rear...

Shifty - these are a good place to start - perhaps even 32F - 34R if its a hot day. As the tyre warms up, you can expect the pressure to rise by as much as 6 psi - this will depend on how hard you are pushing them. On a trackday, its hard not to push ....

But if you start with 34-36 as per Robs advice, you can expect a hot pressure of about 40-42, which is pretty close to what you run normally, so the bike should be just fine.

When I have track days on the MFP12, the cold pressures are set at 32-34. This seems to work well on the old girl, thats using either M3's or 002 Bridgies.

[robracer]

At the end of the day the conditions will make a huge difference, we have raced on days where it will start out 18 Deg C then end up 36 air temp & the track temp will differ by a large amount so ask around & also talk to the ppl there doing the tyre changing services & ask around the garages

[hoffy]

I run front 32 rear 33 and it feels good..

beware, I run the front at 30 one day and I could feel the tyre quishing around and flexing badly under heavy braking into turn 2..it felt wierd man.