Suspension tuning for a Hayabusa?

[lowflyn]

hi all , iv got a k6 hayabusa and im starting to fiddle with the suspension as i ride twisty back roads mostly and im sure we all know the conditions of some of our back roads . i did some research and found out that the busa are setup for 75kg riders. i had a giggle to myself as in full leathers im about 100kgs . i put a cable tie round one of the forks to gauge how much travel the suspension was taking up under heavy breaking and discovered they were all but bottoming out. iv got a reasonable understanding of what adjustments do what but all i end up with is a harsh ride and no front end feel or saggy and horrible on the breaks into corners ,. anyone out there got any hints or tips for me . do i need heavier springs up front or would a heavier grade fork oil be enough ? also has anyone out there tried raising the rear ride height of there busa to help with quicker steering ? any advise or information is welcomed

[Madness]

What profile rear tyre are you running?

[Coldrider]

Needs to sort out suspension both ends before worring about rear ride height, springs at least, then get the correct attitude for designed stability.

[Coldrider]

So the way I read it your springs are too soft, so you are cranking up the compression and rebound to get stability.
The same with the rear, but your weight is causing the rear to drop, so the front end then being higher, won't turn.
Email Dr Rob.

[Madness]

Needs to sort out suspension both ends before worring about rear ride height, springs at least, then get the correct attitude for designed stability.

Ride height is only part of the reason for me asking that question, but you'd already know that, eh?

[lowflyn]

What profile rear tyre are you running?

190-50-17 . i got under 2500km out of a set of bridgestone bt016s so im hoping a proper set up mite help get a couple more kms out of my next set , even tho i know busa eat rubber ,

[Coldrider]

Ride height is only part of the reason for me asking that question, but you'd already know that, eh?

yep, measure the circumference of the tyres to see if they make the bike stand higher or lower than standard. but he has hit the nail on the head with soft springs.

[Pussy]

As a matter of interest, what is the current static and rider sag at each end?

[Madness]

190-50-17 . i got under 2500km out of a set of bridgestone bt016s so im hoping a proper set up mite help get a couple more kms out of my next set , even tho i know busa eat rubber ,

Thought so, a 190/50 will always turn slow as fuck compared to a 190/55.

[lowflyn]

So the way I read it your springs are too soft, so you are cranking up the compression and rebound to get stability.
The same with the rear, but your weight is causing the rear to drop, so the front end then being higher, won't turn.
Email Dr Rob.

pretty much and it turns in but im sure it could be better . is the Dr the man to talk to is he ?

[Coldrider]

pretty much and it turns in but im sure it could be better . is the Dr the man to talk to is he ?

I am sure he will along soon. If it is any consolation I have a a 2012 BPF blade that needs respringing.

[lowflyn]

Thought so, a 190/50 will always turn slow as fuck compared to a 190/55.

bt016s dont come in 55 which kinda sux cause im a big fan of the bridgys . i thought bout going 65 on the front instead of 70 like iv done on another bike but once again couldnt get it in that range of bridgestone . maybe a brand change mite be on the cards

[lowflyn]

I am sure he will along soon. If it is any consolation I have a a 2012 BPF blade that needs respringing.

is it going to be pricey ? will new valves be involved ?

[lowflyn]

As a matter of interest, what is the current static and rider sag at each end?

il have a measure up and get back to you

[Coldrider]

is it going to be pricey ? will new valves be involved ?

Robert Taylor, advertises on this site somewhere, email him and he can give you a price.
Revalving is the next level and maybe worth it, some suspension cannot be reworked, but worth a price at least, and gives you some direction in working towards riding the perfect bike.

i'd do the Michelin PR3