Just nabbed some FCR39s

utopia · 16-10-2016, 01:52 PM

Well, it was a no brainer.
They used to be available from Holland for around £850 but, presumably due to brexit, the price has now risen to £1050.
However, there was still just one pair listed at the old price.
Then I remembered that my son had mentioned that he had an ebay discount option for purchases over £200.
I remembered it as 5% or maybe 10%, but it turned out to be 15%.
That means £750, instead of £1050 ... I told you it was a no brainer.
I just nabbed the last pair by the skin of my teeth.
Yippity dippity doo dah day.

And timely too, as last sunday I experienced the first glimmer of carb icing this winter.
I have reason to hope that this will be a thing of the past with the FCRs

So.
This year alone, I have spent more in mods than the current market value of my M750.
In fact, most of this was at discount rates .. full price would have totalled twice the bike's market value.
But what do I care for market forces ?

Right ... just off to do a little dance then.

Dukedesmo · 16-10-2016, 02:27 PM

Nice one

Nickj · 16-10-2016, 02:46 PM

Hope that's a happy utopia rather than a dad dance!

Mr Gazza · 16-10-2016, 04:41 PM

Te he... Well done mate.

I too am dancing. I'm just back from a ride and happy to have cured the little problem that I had on the ride out with you last weekend.

Total outlay £17.99...

Mark64 · 16-10-2016, 07:38 PM

Congratulations, you will enjoy them soooooo much, look forward to an amazing power delivery and a pair of budgies copulating underneath your petrol tank!!!
Have lots of fun mate��

Grumpy · 16-10-2016, 09:00 PM

More shiny bits!
Can't wait to see them on the old girl

Dukedesmo · 16-10-2016, 09:52 PM

Once you've fitted them, I'd recommend getting it to the dyno to check the fuelling - regardless of it being a 'kit' for the 750 etc. it may need more/less fuel at certain engine speeds and to not sort it might cause problems.

I'd highly recommend SPR in Ruddington for the setup, they know their stuff and are sensibly priced.

Also whilst many things are adjustable on FCRs, you may need to up/down jet sizes, in which case you can get all Keihin parts from Allens performance in Bingham.

utopia · 16-10-2016, 11:17 PM

Yes, that was exactly my plan, and I had noted SPR after previous recommendations from both yourself and others.
I will definitely be expecting to need a dyno set up as I plan to fit the FCRs at the same time as fitting a big bore, Sil-Moto, single-can, hi-level exhaust that I acquired a while ago.
Its a bit battered though, and was originally for a 900, so it needs some work first....but it'll be worth it.

I also plan to at least try and fit them with a single cable throttle, but this will be with banked carbs rather than individuals, so not quite the same as your arrangement.
But for the same reason, ie to get use a 996 twistgrip with the fast idle button, which I bought a while back in anticipation.
The carbs come as a kit with a twin cable twistgrip though, so I have a guaranteed-to-work default option.

Thanks for all the comments.
It was a hoppy kind of dance .. more peter pan than dad, I suppose.
And whaddyamean "old girl" ... she's just turned sixteen.

Dukedesmo · 17-10-2016, 07:36 AM

Quote:

Originally Posted by utopia

I also plan to at least try and fit them with a single cable throttle, but this will be with banked carbs rather than individuals, so not quite the same as your arrangement.
But for the same reason, ie to get use a 996 twistgrip with the fast idle button, which I bought a while back in anticipation.

Mine, being split single carbs had a 2 cable to 4 cable setup (2 opener/2 closer) but I modified it to use a single cable with a 2 way split for the openers and did away with the closer cables as the springs are more than strong enough IMO.

I have a 916 twistgrip on mine which gives a fast-idle position, the only downside is that it has a very short action meaning you get full throttle very quickly and so a bit on/off.

To counter this I recently fitted a 'throttle tamer' which is a replacement throttle tube (billet aluminium!) with a more progressive cam that makes it more controllable at smaller throttle openings and this is a big improvement making it is just about perfect.

Dirty · 17-10-2016, 10:40 AM

I'm imagining it was this sort of dance

https://youtu.be/1W3sslyiUfg

utopia · 17-10-2016, 11:54 AM

Thanks for the info, Tim.
Good stuff, as usual.
I certainly don't want a fast action throttle, particularly at the bottom end.
I'll see how things work out, but am now primed to look out for issues there ....ta.
Maybe there is an option to modify the throttle linkage on my banked carbs, rather than the throttle tube (though I guess that would change the ratio right through the range, whereas a little slower at the bottom may be all that's needed).
We'll see.

As for the dance, in my mind's eye it was probably a little more like this ....

https://www.youtube.com/watch?v=5mcnQQuxDv8

Kato · 17-10-2016, 12:42 PM

If you want them really smooth and even more responsive fit one of these
https://www.boyesen.com/quickshot-3-mx, or for split carbs Tim you need 2

As for the dance well i saw the phrase old girl I had a vision of this
https://youtu.be/9na-PH4kOFU?t=1m00s

Dukedesmo · 17-10-2016, 12:47 PM

Quote:

Originally Posted by utopia

Maybe there is an option to modify the throttle linkage on my banked carbs, rather than the throttle tube (though I guess that would change the ratio right through the range, whereas a little slower at the bottom may be all that's needed).
We'll see.

As far as I know the banked carbs should only have the one cable attachment on one carb due to them being linked?

If so and if it is like that on the split carbs (I think it is) then the cam is a pressed steel wheel with both opening and closing cable fittings so you can easily not use the closer.

I'm not sure if the banked carbs have 2 sets of return springs or one? either way I'll bet there's plenty of strength in it so closer not required (I'm led to believe they were added to avoid any litigation in the US, should anyone crash because a carb didn't close?), neither of my other bikes have any throttle closing cable.

The throttle cam on the 'tamer' is machined alloy and a direct replacement for the OEM plastic piece, I did consider attempting to modify said OEM throttle, which maybe possible. Alternatively a resourceful man with a lathe might be able to make something for either the twistgrip or the carb end cam?

If you want to see/measure/weigh/try how mine works before jumping in to changing throttle ratios etc. you're more than welcome.

Dirty · 17-10-2016, 04:32 PM

Quote:

Originally Posted by utopia

As for the dance, in my mind's eye it was probably a little more like this ....

https://www.youtube.com/watch?v=5mcnQQuxDv8

But in reality like this?

https://youtu.be/RUaYbfKZIiA

Grumpy · 17-10-2016, 04:48 PM

Quote:

Originally Posted by Dirty

But in reality like this?

https://youtu.be/RUaYbfKZIiA

The funny thing is, can see Geff doing this in his in his kitchen!!

16-10-2016, 01:52 PM	#1
utopia No turn left unstoned Join Date: Jun 2010 Location: leicester Bike: M750 Posts: 4,545	Just nabbed some FCR39s Well, it was a no brainer. They used to be available from Holland for around £850 but, presumably due to brexit, the price has now risen to £1050. However, there was still just one pair listed at the old price. Then I remembered that my son had mentioned that he had an ebay discount option for purchases over £200. I remembered it as 5% or maybe 10%, but it turned out to be 15%. That means £750, instead of £1050 ... I told you it was a no brainer. I just nabbed the last pair by the skin of my teeth. Yippity dippity doo dah day. And timely too, as last sunday I experienced the first glimmer of carb icing this winter. I have reason to hope that this will be a thing of the past with the FCRs So. This year alone, I have spent more in mods than the current market value of my M750. In fact, most of this was at discount rates .. full price would have totalled twice the bike's market value. But what do I care for market forces ? Right ... just off to do a little dance then.

16-10-2016, 02:27 PM	#2
Dukedesmo Registered User Join Date: Sep 2010 Location: Leics Bike: M900 Posts: 2,844	Nice one __________________ M900, 916, LeMans II.

16-10-2016, 02:46 PM	#3
Nickj Too much time on my hands member Join Date: Jun 2007 Location: Forest Of Dean Bike: S2r Posts: 3,193	Hope that's a happy utopia rather than a dad dance! __________________ "The final measure of any rider's skill is the inverse ratio of his preferred Traveling Speed to the number of bad scars on his body." Song of the sausage creature

16-10-2016, 04:41 PM	#4
Mr Gazza Lord of the Rings Join Date: May 2013 Location: Norwich Bike: M900sie Posts: 5,815	Te he... Well done mate. I too am dancing. I'm just back from a ride and happy to have cured the little problem that I had on the ride out with you last weekend. Total outlay £17.99... __________________

16-10-2016, 09:00 PM	#6
Grumpy record breaker!! Join Date: Apr 2006 Location: Peterborough Bike: M1200R Posts: 2,154	More shiny bits! Can't wait to see them on the old girl __________________ It's not the destination, but the journey that matters Definition of a motorbike, a devise for overtaking cars!

16-10-2016, 07:38 PM	#5
Mark64 Bronze Member Join Date: Nov 2014 Location: Hondon de los Frailes Bike: S4r Posts: 287	Congratulations, you will enjoy them soooooo much, look forward to an amazing power delivery and a pair of budgies copulating underneath your petrol tank!!! Have lots of fun mate��

16-10-2016, 09:52 PM	#7
Dukedesmo Registered User Join Date: Sep 2010 Location: Leics Bike: M900 Posts: 2,844	Once you've fitted them, I'd recommend getting it to the dyno to check the fuelling - regardless of it being a 'kit' for the 750 etc. it may need more/less fuel at certain engine speeds and to not sort it might cause problems. I'd highly recommend SPR in Ruddington for the setup, they know their stuff and are sensibly priced. Also whilst many things are adjustable on FCRs, you may need to up/down jet sizes, in which case you can get all Keihin parts from Allens performance in Bingham. __________________ M900, 916, LeMans II.

16-10-2016, 11:17 PM	#8
utopia No turn left unstoned Join Date: Jun 2010 Location: leicester Bike: M750 Posts: 4,545	Yes, that was exactly my plan, and I had noted SPR after previous recommendations from both yourself and others. I will definitely be expecting to need a dyno set up as I plan to fit the FCRs at the same time as fitting a big bore, Sil-Moto, single-can, hi-level exhaust that I acquired a while ago. Its a bit battered though, and was originally for a 900, so it needs some work first....but it'll be worth it. I also plan to at least try and fit them with a single cable throttle, but this will be with banked carbs rather than individuals, so not quite the same as your arrangement. But for the same reason, ie to get use a 996 twistgrip with the fast idle button, which I bought a while back in anticipation. The carbs come as a kit with a twin cable twistgrip though, so I have a guaranteed-to-work default option. Thanks for all the comments. It was a hoppy kind of dance .. more peter pan than dad, I suppose. And whaddyamean "old girl" ... she's just turned sixteen.

17-10-2016, 10:40 AM	#10
Dirty Bockloks Join Date: Jan 2012 Location: London Bike: No Bike Yet! Posts: 4,601	I'm imagining it was this sort of dance https://youtu.be/1W3sslyiUfg __________________ Wounds heal, chicks dig scars, glory lasts forever Beware of eBay

17-10-2016, 11:54 AM	#11
utopia No turn left unstoned Join Date: Jun 2010 Location: leicester Bike: M750 Posts: 4,545	Thanks for the info, Tim. Good stuff, as usual. I certainly don't want a fast action throttle, particularly at the bottom end. I'll see how things work out, but am now primed to look out for issues there ....ta. Maybe there is an option to modify the throttle linkage on my banked carbs, rather than the throttle tube (though I guess that would change the ratio right through the range, whereas a little slower at the bottom may be all that's needed). We'll see. As for the dance, in my mind's eye it was probably a little more like this .... https://www.youtube.com/watch?v=5mcnQQuxDv8

17-10-2016, 12:42 PM	#12
Kato Dismantled Join Date: Feb 2006 Location: East Molesey Bike: Multiple Monsters Posts: 2,223	If you want them really smooth and even more responsive fit one of these https://www.boyesen.com/quickshot-3-mx, or for split carbs Tim you need 2 As for the dance well i saw the phrase old girl I had a vision of this https://youtu.be/9na-PH4kOFU?t=1m00s __________________ "Political correctness is just intellectual colonialism and psychological fascism for the creation of thought crime" Last edited by Kato; 17-10-2016 at 12:44 PM..