1"raising links

[GOOFTROOP]

Fitted 1" raising link to rear of Busa today.Changes direction much quicker but know rear spring seems too stiff,can't get anymore than 10mm rider sag. Is this normal,do I need softer spring?
Brookesy

[Batfink]

You need a fatter ass... Wanna borrow mine lol

[storm]

30% static sag but stiffer should run better when riding hard. Getting mine made by my customiser friend in India.will increase clearance and sharper turn in.r u running a 55 profile rear goof? The combo will be more than 1" lift

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I am back to 50 profile to use soft portion of tire more

[GOOFTROOP]

30% static sag but stiffer should run better when riding hard. Getting mine made by my customiser friend in India.will increase clearance and sharper turn in.r u running a 55 profile rear goof? The combo will be more than 1" lift

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I am back to 50 profile to use soft portion of tire more

Yes storm I'm running 55 rear with schnitz +1' links..really like way it turns now,made for Tassie roads
Rear spring was bit stiff before mods as I only a light weight (70kg? geared up) and pushing harder just means back wheel off the ground more on bumps and hard braking so time for softer one I reckon.
Brookesy

[storm]

I am about 75kgs in full gear, don't sit , actually stand on pegs 1" off seat. Suspension really stiff

[Shifu]

Fitted 1" raising link to rear of Busa today.Changes direction much quicker but know rear spring seems too stiff,can't get anymore than 10mm rider sag. Is this normal,do I need softer spring?
Brookesy

Is the preload adjuster all the way up?

[Ward P]

I also always run 55 profile rear. And wondered about raising the back a little. I'll be interested in your thoughts once you have the suspension properly set up.

[Shifu]

I also always run 55 profile rear. And wondered about raising the back a little. I'll be interested in your thoughts once you have the suspension properly set up.

Running highier profile tires has only a marginal effect on it. To do it properly you need to make an adaptor that would "extend" your rear shock absorber. On sports bike it is so much easier as you can use spacers of different thickness. The problem with the so called "adjustable liknks" is that using them, apart of changes the riding height, also changes the ratio of forces within the linkage system and screws up all the suspension settings and sags for a given spring rate as some of the members are finding out. It is like TRE versus "flush" options.

[GOOFTROOP]

Is the preload adjuster all the way up?

Preload wound all the way off,I reckon your right Shifu the links have changed the ratio for the spring and what was tolerable before is now too stiff. will have to play around with different spring rates now to get it right..racetech spring calculator says I need 1 rate softer when stock so will try going 2 softer and see what happens..I not working for a while so have plenty of time to sort out before GP/Tathra.
Brookesy

[mozzie26]

Is the preload adjuster all the way up?

Preload wound all the way off,I reckon your right Shifu the links have changed the ratio for the spring and what was tolerable before is now too stiff. will have to play around with different spring rates now to get it right..racetech spring calculator says I need 1 rate softer when stock so will try going 2 softer and see what happens..I not working for a while so have plenty of time to sort out before GP/Tathra.
Brookesy

Hey David you going to the MotoGP? I will be riding down from Qld.

[Tony Nitrous]

Quite normal.
I've jacked up bandit 12's and it firms the suspension,
I've lowered SV650's and it softens the suspension.

You've changed the angle / ration of the linkage.

I find running a 190/55 with firm suspension is OK.
I Would maybe try this with a smaller lift in the dog bones.

Ideally a longer (higher quality) shock would be the way to go I think.

Currently lifted the back of my GSX1400 by 30mm and it suits me
(Although o e folk hate it) but being old skool twin shocks didn't have the same issues.

[Ward P]

A little off tangent to the topic, I don't notice a ride difference between 50 and 55 profile, but I find a 55 profile vs a 50 profile gives me more lean angle before I end up on the edge. ie. it's a lot easier to get to the edge on the 50 profile, so I'm assuming I have more rubber on the road on big lean angles with the 55. & perception = confidence.

[storm]

A little off tangent to the topic, I don't notice a ride difference between 50 and 55 profile, but I find a 55 profile vs a 50 profile gives me more lean angle before I end up on the edge. ie. it's a lot easier to get to the edge on the 50 profile, so I'm assuming I have more rubber on the road on big lean angles with the 55. & perception = confidence.

That's right wardy, on the street With55 profile we r not using the softbest stickies bit of the tyre most of the time, hence the 50 to use the edge more ,with 55 and crowning knee down and still tyre not on sticky edge.explained very well by cydemgum in some tyre posts who I think carves the Oxley everyweekend superquick and knows tyre business.apparently IOM tt Racers run 180 size tyres on litre bikes for similar reasons.
anyway got a power 4 50 section tyre waiting to go on. Let's see how it feels

[Tony Nitrous]

Im running an S20 rear. Plenty of grip.
The 55 feels nicer flicking left right and cranked over.
Extra grip would be of no use, I have enough,
Ground clearance and tip in are now better.

I've run 109/50, 190/55 and 200/50's from several brands
as 3 of my bikes have 6" rears.
The numbers aren't set in stone as there is a variation between makes and models
and some "same size" are bigger / smaller than others.

A sticky 55 works well for me unless I'm running raised ride height.

[mozzie26]

I put 190/55 on my Gen 1, on the road I had 15mm chicken strips, went and did a track day at Queensland Raceway and I used the whole tyre right to the edge. With the 190/55 the steering is lighter and it just makes the whole bike feel lighter. I also put heavier springs front and rear to suit my weight and this has lift the bike up a bit. When I got the Gen 1 from the Auctions it had a 200/50 on the rear, the bike felt like it did not want to go around corners to the point it felt dangerous!
My Gen 2 has 190/50 on, just put a new set of Pilot Road 4's on for the ride down to Phillip Island MotoGP. With the 190/50 on the road I have 3mm chicken strips. I have keep to the 50 profile on the Gen 2 as the bike is more set up for touring with 1" bar risers. With the 50 profile the bike also feels more stable on the straights when you get those gusty cross winds. Going to the 55 profile on the road for me would just be wasting that last bit of tread near the edge, I like to use the whole tyre.
So for fanging or track days go the 55 profile and for normal riding or touring stick with the 50 profile.

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Fitted 1" raising link to rear of Busa today.Changes direction much quicker but know rear spring seems too stiff,can't get anymore than 10mm rider sag. Is this normal,do I need softer spring?
Brookesy

Looking at the Racetech spring calculator for 70kg race setup you want 0.955kg front and 13.2kg rear.
Std Gen 2 is 0.93kg front and 14.5kg rear. So the front is OK but rear is too heavy for 70kg.
The Gen 1 is sprung softer than the Gen 2 with 0.85kg front and 13.1kg rear.
I have just put 1.2kg front and 15.2kg rear on my Gen 1 to set it up for my weight to do track days. I can post the 13.1kg to you if you would like to try that. But you may need to go lighter(12.5kg) if that raising link is making it harder.