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Offline v8guy

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RaceTech gold valves
on: October 28, 2016, 07:38:48 PM
So after the lovely suspension fettlers at PDQ had given the thing a good look over, taken it to Nitron for their inspection, and thought about it... we concluded that a RaceTech-enhanced front and rear was the way to go.

So I now have gold valves in forks and shock, and RT linear springs up front.. and an entirely more civilised bike!  :062:

Only done about 50 miles on it so far, but the transformation is remarkable.. it feels marginally softer all round, but sticks to the road like glue. No more squatting rear end under acceleration, no harsh front end. Time will tell how it responds to being pushed harder... Those 50 miles are on new tyres, so I'm taking it easy for another 50. Will post a report once I've explored the potential a bit further.
Current: BMW R1200RS, 2003 Yamaha TDM900
Past: Honda CLR125, Honda CB500, Triumph Sprint Sport, Honda VFR750FS, Suzuki DRZ400SM, 2001 Triumph Speed Triple 955i, 2015 Honda VFR800X

"Being shot out of a cannon will always be better than being squeezed out of a tube" - HST

Online Skids

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Re: RaceTech gold valves
Reply #1 on: October 29, 2016, 07:40:40 AM
Sounds positive, please keep us updated.  :018:
98 VFR800 - 130,000 miles (sold)
08 VFR800 - 76,000 miles (sold)
14 VFR1200 - 20,000 miles
15 VFR800X - 44,000 miles (sold)
18 VFR800X - 9,000 miles

Offline v8guy

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Re: RaceTech gold valves
Reply #2 on: October 29, 2016, 08:42:28 AM
Forgot to say they also added a gas recharging valve to the shock, after discovering that in order to set static sag to an acceptable level the preload needed to be wound up to almost max. After recharging it, correct sag was achieved at about 1/3 off minimum setting. The bike's done only 6500 miles.

Another observation from the workshop was that removing the shock is a time consuming exercise... 2-3 hours, thanks to the top mount being buried so deep in other components. They didn't have to entirely remove the subframe and exhaust headers, but nearly!
Current: BMW R1200RS, 2003 Yamaha TDM900
Past: Honda CLR125, Honda CB500, Triumph Sprint Sport, Honda VFR750FS, Suzuki DRZ400SM, 2001 Triumph Speed Triple 955i, 2015 Honda VFR800X

"Being shot out of a cannon will always be better than being squeezed out of a tube" - HST

Offline 54K+

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Re: RaceTech gold valves
Reply #3 on: October 29, 2016, 08:47:57 AM
Wow.
Sounds like you might have I tamed at last. I thought the front end was over sprung and under damped. ( but what do I know  :087: ) what did they say about the front end??

Offline v8guy

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Re: RaceTech gold valves
Reply #4 on: October 30, 2016, 11:17:44 AM
*Originally Posted by 54K+ [+]
Wow.
Sounds like you might have I tamed at last.
I really hope so! Further riding is requried.. I must take the long way to work tomorrow. :002:

*Originally Posted by 54K+ [+]
I thought the front end was over sprung and under damped. ( but what do I know  :087: ) what did they say about the front end??
Spring rate has been slightly reduced, as I recall. I felt the low speed damping was ok, but the high speed compression was over damped to the point of agony. First impressions are that they've absolutely sorted the high speed compression issues, and that low speed compression feels about the same. Rebound feels faster (so i guess less dampened), but better controlled.

At the rear end, they stuck with the OEM spring. It is of the progressive, variable diameter variety and space issues at the upper end prevent the fitment of a uniform diameter, linear spring. According to their measurement, the OEM spring is slightly undersprung for my weight, but within an acceptable tolerance to be offset by heavier damping.
Current: BMW R1200RS, 2003 Yamaha TDM900
Past: Honda CLR125, Honda CB500, Triumph Sprint Sport, Honda VFR750FS, Suzuki DRZ400SM, 2001 Triumph Speed Triple 955i, 2015 Honda VFR800X

"Being shot out of a cannon will always be better than being squeezed out of a tube" - HST

Offline v8guy

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Re: RaceTech gold valves
Reply #5 on: November 13, 2016, 11:29:07 PM
A couple of weeks and few tankfulls of fuel later... I'm still delighted with the results.  :001:

The thing sticks to the road like glue.. no more traction control lighting up when on the gas over some bumpy bits, no more "BRACE!!!" for big bumps, and no more going out of shape during a swift one-side-to-the-other transition. The damned thing is unflappable.

Fuel economy, on the other hand, has taken a marked turn for the worse. On the basis of a couple of tanks full, doing exactly the same commuting, I'm using 6% more fuel per mile since the upgrade... I guess it relates to being able to use the throttle more, and doing exactly that.  :017:
Current: BMW R1200RS, 2003 Yamaha TDM900
Past: Honda CLR125, Honda CB500, Triumph Sprint Sport, Honda VFR750FS, Suzuki DRZ400SM, 2001 Triumph Speed Triple 955i, 2015 Honda VFR800X

"Being shot out of a cannon will always be better than being squeezed out of a tube" - HST

Offline 54K+

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Re: RaceTech gold valves
Reply #6 on: November 15, 2016, 12:37:07 PM
Good to hear that you have got it sorted.

I do miss the sporty nature of the beast and quick turning compared to the 19" wheel on the Aprilia,  but the Honda made me ride like I stole it most of the time. The Caponord gives me the option to however the mood takes me. It is big and heavy ( just like me) and feels just more grown up  :087: I suppose.

Anyway, congrats. on getting your bike to where you want it and where it deserves to be.

Offline v8guy

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Re: RaceTech gold valves
Reply #7 on: November 15, 2016, 04:52:21 PM
*Originally Posted by 54K+ [+]
Good to hear that you have got it sorted.

Cheers. Just been out for my first proper aimless-bimble ride since I had the work done. I made the schoolboy error of setting off having spent an hour or so watching MotoGP testing... but the machine took my somewhat more exuberant style in its stride. Again, really impressed with it. It's been unflappable.

*Originally Posted by 54K+ [+]
I do miss the sporty nature of the beast and quick turning compared to the 19" wheel on the Aprilia,  but the Honda made me ride like I stole it most of the time.
Yeah, that's how I just rode it!  :001:

Out of interest... what made you choose the Rally version over the regular? That front wheel would be why I'd go for the standard bike.

*Originally Posted by 54K+ [+]
It is big and heavy ( just like me) and feels just more grown up  :087: I suppose.
A former Crossrunner owner describing a bike as big and heavy... jeez, it must be a beast!!  :005:
Current: BMW R1200RS, 2003 Yamaha TDM900
Past: Honda CLR125, Honda CB500, Triumph Sprint Sport, Honda VFR750FS, Suzuki DRZ400SM, 2001 Triumph Speed Triple 955i, 2015 Honda VFR800X

"Being shot out of a cannon will always be better than being squeezed out of a tube" - HST

Online Skids

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Re: RaceTech gold valves
Reply #8 on: November 15, 2016, 06:00:38 PM
*Originally Posted by v8guy [+]

A former Crossrunner owner describing a bike as big and heavy... jeez, it must be a beast!!  :005:

Haha, you've not pushed a VFR1200 around! :004:

But like the CR, the weight seems to fall away as soon as she is moving.

Whilst I like the sound of your suspension upgrades and have witnessed what a good upgrade it is on my 1200, I'm not sure I can justify the spondoolies on my commuter.  :084:

Glad yr enjoying it.  :028:
98 VFR800 - 130,000 miles (sold)
08 VFR800 - 76,000 miles (sold)
14 VFR1200 - 20,000 miles
15 VFR800X - 44,000 miles (sold)
18 VFR800X - 9,000 miles

Offline 54K+

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Re: RaceTech gold valves
Reply #9 on: November 15, 2016, 06:37:16 PM
Oh yes it is a beast! I chose the rally on looks and They had  been done minor fettling. Heavier rear spring. Taller screen. Better engine management. But mainly the looks.

I used to have a vfr1200f a light weight by comparison. My knees used to complain on long rides and Licence shreddingly F. A.  S...  T

C.r. Seems almost toy like in comparison  :005: