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Discussion Starter #1
So I was looking through the mounting instructions for the Öhlins FGRT 208 front fork and the SU 026 shock absorber for my 2008 Hayabusa.
What confused me is the strange sag recommendations they give in their mounting instructions (see pictures). They even recommend different sag numbers in the two mounting instructions... could somebody give me a hint which recommendation to follow for street use?
Is there any reason why you would want 25 mm of sag in the back while having 50 mm of sag in the front like Öhlins recommends in their shock absorber mounting instructions? :dunno
Thanks in advance for your help! :cheers
 

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For the street shoot for 30mm rear and 35mm front.
 

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Any horsepower mods now that you've got the suspension taken care of??
 

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Discussion Starter #5
Any horsepower mods now that you've got the suspension taken care of??
Unfortunately I am not allowed to do any signifigant horsepower mods because then my bike would no longer be street legal... my Yoshimura slip-on exhausts are pretty much the only thing that I am allowed to use on the street.
Welcome to Switzerland... :cursing
 

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Well that's shitty :thumbdown
 

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Well that's shitty :thumbdown
Yes it is... But I personally don't care too much about horsepower... the Hayabusa has plenty of it in its stock form for my taste.
What I will be upgrading next is the mastercylinder, brake lines, calipers, brakepads and rotors. :woot
When the brakes are done all future mods will be aimed at weight reduction... we will see what I'm willing to do when the time comes. :banana
 

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I'm not sure if the non-US market bikes have the catalytic convert or not,but ditching the stock exhaust is worth 44lbs. I was able shave some significant weight off of my Gen2 relatively easy. I also have BST wheels which made a huge difference in handling.

Adding some timing thru the ECU will help smooth out the engine/vibrations thru the bars,I'd recommend that if you're able to;the Gen2 ECU is amazing in what can be accomplished in regards to tuning.

Not too many Busa guys here. The 2 largest&most knowledgeable and active forums are suzukihayabusa.org and hayabusa.org
 

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Discussion Starter #9
I'm not sure if the non-US market bikes have the catalytic convert or not,but ditching the stock exhaust is worth 44lbs. I was able shave some significant weight off of my Gen2 relatively easy. I also have BST wheels which made a huge difference in handling.

Adding some timing thru the ECU will help smooth out the engine/vibrations thru the bars,I'd recommend that if you're able to;the Gen2 ECU is amazing in what can be accomplished in regards to tuning.

Not too many Busa guys here. The 2 largest&most knowledgeable and active forums are suzukihayabusa.org and hayabusa.org
Thanks for the advise. Too bad full exhaust systems and ECU modification are not permitted for street use in Switzerland... :cursing
I was already looking at these BST wheels and I like the idea of putting them on my Hayabusa... but first I will have to make some phone calls to clarify if these wheels are street legal in my country or not... whish me luck! :suicide
 

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Good luck :cheers
 

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For the street shoot for 30mm rear and 35mm front.
Aren't sag numbers relative to total travel? I would stay within the manufacturer's guidelines to start. With Ohlins recommending 10-20 as the range for the rear, 30mm is probably not a good choice. This isn't stock suspension.

OP, they give you a range in the first doc, and a hard recommendation in the second.
 

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Aren't sag numbers relative to total travel? I would stay within the manufacturer's guidelines to start. With Ohlins recommending 10-20 as the range for the rear, 30mm is probably not a good choice. This isn't stock suspension.

OP, they give you a range in the first doc, and a hard recommendation in the second.
I think you are looking at free sag, not rider sag...
 

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Unfortunately I am not allowed to do any signifigant horsepower mods because then my bike would no longer be street legal... my Yoshimura slip-on exhausts are pretty much the only thing that I am allowed to use on the street.
Welcome to Switzerland... :cursing
Well in Australia it's sort of the same deal but nobody is really checking.
I hear Switzerland is super anal about that stuff. If you were to do it how would they know and what would they do?

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Well in Australia it's sort of the same deal but nobody is really checking.
I hear Switzerland is super anal about that stuff. If you were to do it how would they know and what would they do?

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In Switzerland you are pulled over by the police from time to time and they will inspect your motorcycle. Even minor modifications like removing the baffles from your street legal exhaust can end in a criminal record and a fine somewhere near 2000$.
It's ridiculous. :cursing
 

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I think you are looking at free sag, not rider sag...
They're calling rider sag "Right Height".

Left image front says free should be 15-30 and right image says 43.
Left image rear says free should be 10-20 and right image says 10.

Left image front says rider should be 35-50 and right image says 50.
Left image rear says rider should be 25-40 and right image says 25.

So the only one that's a discrepancy is that front free sag. What I was saying is the sag measurement for a 5" travel fork is different from a 6" travel fork. I'm not sure what the stock travel on an 08 Busa is, nor what the travel is on the Ohlins FGRT 208. I see a lot of suspension questions for different bikes all say 30-35mm up front, but no one ever talks about the variability in the fork. I've seen some low level setup guides that cover multiple models say you want about 1/3 of your travel in sag. For my 2005 600, the stock fork has 120mm of travel. That would mean I need 40mm of sag. 30mm would be 1/4. I just looked up the FGRT208 and it's a 120mm fork. So 50mm of front sag is a lot! So my question would be to Ohlins about why they're recommending so much......
 

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In Switzerland you are pulled over by the police from time to time and they will inspect your motorcycle. Even minor modifications like removing the baffles from your street legal exhaust can end in a criminal record and a fine somewhere near 2000$.
It's ridiculous. :cursing
A criminal record? How's is that a criminal offense though. Wow, I'm sorry my friend. I'd hate to think what they would do if they caught you speeding or doing a wheelie

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Discussion Starter #17 (Edited)
A criminal record? How's is that a criminal offense though. Wow, I'm sorry my friend. I'd hate to think what they would do if they caught you speeding or doing a wheelie

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Sorry I meant criminal charge not criminal record...
If you get caught doing 100 km/h where the speed limit is 50 km/h you go to jail for 1 to 4 years, lose your license for at least 2 years and it is possible that they take away your vehicle forever... :wacko
 

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Sorry I meant criminal charge not criminal record... If you get caught doing 100 km/h where the speed limit is 50 km/h you go to jail for 1 to 4 years, lose your license for at least 2 years and it is possible that they take away your vehicle forever... :wacko
Nice country, bean there, wont live there with archaic rules like that..:wacko
prolly wont see H-D boys with LOUD chimneys in swiss-land??
 

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Sorry I meant criminal charge not criminal record...
If you get caught doing 100 km/h where the speed limit is 50 km/h you go to jail for 1 to 4 years, lose your license for at least 2 years and it is possible that they take away your vehicle forever... :wacko
Jesus christ on a stick. I honestly thought Australia was bad.

Forgive me but you must have huge balls to ride a busa then...just a fraction on the throttle and you go to jail.

I'd be riding a 125cc scooter ha...but then again you have some of the best roads in the world.

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Jesus christ on a stick. I honestly thought Australia was bad.

Forgive me but you must have huge balls to ride a busa then...just a fraction on the throttle and you go to jail.

I'd be riding a 125cc scooter ha...but then again you have some of the best roads in the world.

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so my guess is you guys go to other countries like Germany that have autobahns and reasonable and prudent speed limits, I know I would..

you don't need any more power with a gen 2 but a BMC race filter helps, amsoil full synth, and NGK laser irridums may give you a couple more

curious, couldn't you get a spare ECU and mod it, then swap it out for the stocker when it comes time to do your licensing? how else could they tell its been modded, specially just leveling out the performance, it will actually burn more efficient that way, less emissions, you would think they are into that?

put a O2 sensor on each pipe outlet and dynamically level it out no matter the elevation its always spot on, you can get it to burn exactly how you want it no matter where you are, full compensation, bolt on but you can easily pull that stuff and toss the stocker on come emissions time, Germany isn't far is it? id pin and play that Kraftwork song "Autobahn" :)
 
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