Setting preload question

[richy170]

I've lost some weight since I bought my bike and want to revisit the preload settings that were adjusted for me when I bought the bike. Reading the manual, page 63 it gives a value of negative spring displacement of front wheel of 10-15mm with rider of 85 kg. Am I right in thinking then that the displacement value should be always 10-15mm and that preload should be adjusted to achieve 10-15mm displacement when I sit on the bike and measure the difference, value D.
The same question for the rear wheel with displacement value in the manual of 8-12mm.
Thanks

 

[alex]

Which year of bike? DDC or standard?
https://www.youtube.com/watch?v=oLkUEkxt6X0

From what I see in this video the 2015+ bikes;
You should have 90mm of front travel showing - add preload till you hit that when sat on it.
The rear sag should be about 20-25mm.

 

[richy170]

It's a 2015 3rd gen with DDC. Thanks for the video link.

 

[richy170]

I visited MH Racing of Chippenham this morning and Mark Hammond adjusted the settings on the suspension as a ride in service. Really pleased with the adjustments in particular with the new rebound settings on the rear. He felt the bike would be much improved if I changed the front springs to a pair of 9.5nm. He also has an Ohlins steering dampener that I can have installed at cost. I'm going to ride it for a few days and then look at getting this work done. I am now keen to explore the options of splitting the rebound and compression on the front. I think I read that a few of you have done it and that it's a 2D sensor. How costly is it, baring in mind I need to pay for labour as it's beyond my capabilities. I also recall reading that it may affect the bikes turning circle, is this correct. Any input would be greatly appreciated.

 

[alex]

If you're road only I don't see the point. But,
€475 https://shop.alpharacing.com/shop/i...nid=utloaa43f2i5jkinbi7md0bcl4&cPath=1_44_59&

The fitting is actually very simple. One bracket goes around the fork leg at the bottom, one at the top, plug into the port spare near the head stock. Fit the bump stops to the head stock to reduce the angle of turn. To stop the sensor being trapped/hit. Should only need to remove the LHS panel to complete it.

I think my steering damper is on 8 clicks out (from max). If the suspension is setup right you won't need it.

 

[soofsayer]

The key thing to point out having done this myself is if you want to do it, to fit the 2d sensor correctly you will need to completely unload the front forks to measure and fit the unit, so if you don't have a suitable stand to do this there is extra expense waiting..... the fitting is very easy once you can achieve this and does not require a workshop technician.

You can also fit the sensor upside down and shave some of the lock stop down on that side to give more turning radius but you will see a big difference to original setup. It isn't an issue riding, more when manoeuvring the bike in the garage or parking. Also you can't use the steering lock.

 

[bananaman]

The key thing to point out having done this myself is if you want to do it, to fit the 2d sensor correctly you will need to completely unload the front forks to measure and fit the unit, so if you don't have a suitable stand to do this there is extra expense waiting..... the fitting is very easy once you can achieve this and does not require a workshop technician.

You can also fit the sensor upside down and shave some of the lock stop down on that side to give more turning radius but you will see a big difference to original setup. It isn't an issue riding, more when manoeuvring the bike in the garage or parking. Also you can't use the steering lock.

Rope over a beam or trolley jack under headers ?

 

[MackemQ]

I've just set my preload this morning on my 2017 rr and I'm gonna need a heavier spring in the rear, does anyone know of any suspension tuners in the north that work on the ddc

 

[richy170]

Am I correct in presuming those on the forums overseas who have fitted this and say they still get full lock would have done so without fitting the bump stops?

 

[alex]

I've just set my preload this morning on my 2017 rr and I'm gonna need a heavier spring in the rear, does anyone know of any suspension tuners in the north that work on the ddc

Any suspension place should be able to replace the spring with a heavier one. Or you could just buy one from Alpha.

 

[alex]

Am I correct in presuming those on the forums overseas who have fitted this and say they still get full lock would have done so without fitting the bump stops?

Sounds like it.

 

[fast_ryan]

2D Potentiometer

Am I correct in presuming those on the forums overseas who have fitted this and say they still get full lock would have done so without fitting the bump stops?

If you fit the supplied lock stops when installing the 2D potentiometer it will noticeably restrict steering movement. I would certainly advocate using them to protect the sensor as ultimately you are fitting a delicate race potentiometer to a road bike. In my opinion for road use the 2D potentiometer isn't required as the standard damping settings are very good; particularly if you have changed the spring weight. On track the ability to adjust front compression and rebound separately is immensely useful.

 

[Corkgsxr]

im 82 kg without gear and i find the rear hard. but from standard my preload is fully out. what sort of moneys is a rear spring

 

[fast_ryan]

alpha Racing

Expect to pay around ?120 for a rear spring from alpha Racing.