KR-1S.co.uk Forum

Hi Guys,

Did a trackday at cadwell on my newly acquired fzr400rr. Handles really well felt lovely all day. Got a slight wobble as I stuck it down a gear into charlies but that was it.

The front tyre has some ridges in it. As I'm new to trackdays I was wondering if it pointed to a suspension issue. Or are the ripples the sort of thing that occurs under braking?



I must add that I had done 25 miles on the road after this trackday so the ridges have been squished a bit. I have another picture from on the day that I am putting up now:



The tyres are maxxis supermaxx (very good for the money) and the tyre pressures were 28 front and rear. Rebound was set at 8 clicks out of 13 (quite alot, hence the question really) and compression was set at 8 clicks out of 13 also. Felt nice on track and these were the settings in the forks when I fitted them.

Cheers,

Dan

Mansfield and Park causes that rippling effect on the tyre under braking Dan, I would say it's quite common if you're giving it some and I imagine you're lapping around 150's now.

Cheers Ben!

That's a relief! The fzr probably only has 45-48 bhp at the moment so it's lacking a bit of go. Was managing 1:57's though with the traffic thrown in for good measure.

Dan

Blimey, that's really low. Those things kick out 80bhp when they are sorted. Steve Saint has a good one and Dan Williams used to have a quick one too.

Are you going to sort it out and tune it?

I plan to sort the engine out so that it is in a decent reliable standard spec as this will be my second trackbike. At the moment it only has the standard restricted CDI and the only mods are a micron can with a ridiculous baffle in it. I've managed to get the carbs set up a bit better than they were so it runs quite nice now. Think it is a bit rich though. The suspension is sorted as it has a 2006 r6 rear shock and RRSP front forks worked by maxton. I'll strip a bit of weight off it and stick a fibreglass fairing on it and that will do to be honest.

I bought it to use while I fix the 3xv but (annoyingly) I actually really enjoy riding it. It has made me realise how crap the R model suspension is on my 3xv lol.

Dan

You need to stick a heavier weight oil in those 3XV forks, it will make a big difference.

Have you ever done an oil change on them before?

Yep I agree a heavier weight oil will help. However they are far too undersprung for my bodyweight. Yep they had fresh oil in last time I was at Cadwell.

My plan is to get a set of 3xv SP forks for it (which are fully adjustable) and a much better starting point than the non-adjustable R model forks.

Dan

That's the problem with our frames when riding 250's, they were designed for spotty lightweight teenagers or japs

With the exception of Fontyyy and this is now past tense, as he's lighter than me now, I have got to be the heaviest 250 rider currently racing, even Alex Leek is lighter than me!

You might find it better just getting a pair of TZ forks for the 3XV, as I'm not sure how frequently SP forks become available. Alternatively you could send them away to be re-worked and improved by someone like K-Tec or Maxton.

Sets are always popping up on yahoo japan. I'm sure I'll find a set Rear shock is easy as you can get nitron or wilbers units off the shelf.

Yep I'm 16 stone so would that make me the heaviest on a 250 if I raced haha?

Dan

Yeah you would beat me.