BritBike Forum logo
BritBike Sponsor BritBike Sponsor BritBike Sponsor
BritBike Sponsor

BritBike Sponsor

BritBike Sponsor
BritBike Sponsor BritBike Sponsor BritBike Sponsor
JWood Auctions JRC Engineering dealers JWood Auctions
Home | Sponsors, Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons, "OLD" BritBike Forum | DVD- Manuals & Parts books | BritBike Stickers & Decals
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
Member Spotlight
dodgeboy57
dodgeboy57
Michigan
Posts: 76
Joined: November 2007
Show All Member Profiles 
Shout Box
Search eBay for motorcycle parts in following countries
Australia, Canada, France, Holland, Italy, United Kingdom, USA
Random Gallery photo
Who's Online Now
16 registered members (BeezaBryan), 149 guests, and 53 spiders.
Key: Admin, Global Mod, Mod
Newest Members
Gordo, to.bias, Nomdegom, Andy Mac, kwbikr
10381 Registered Users
Top Posters(30 Days)
NickL 98
Mori55 92
Stuart 87
DavidP 73
reverb 69
Triless 69
Rohan 67
Popular Topics(Views)
688,750 mail-order LSR
Forum Statistics
Forums34
Topics68,017
Posts661,660
Members10,381
Most Online3,995
Feb 13th, 2017
Like BritBike.com on Facebook

Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 2 1 2
Front fork Mod - 850 Commando #73399
02/03/08 8:39 pm
02/03/08 8:39 pm
Joined: Sep 2006
Posts: 609
Mexico City, Mexico
MexicoMike Offline OP
BritBike Forum member
MexicoMike  Offline OP
BritBike Forum member
Joined: Sep 2006
Posts: 609
Mexico City, Mexico
Another thing I have discovered here in Mexico City is that the oem forks bang frequently in the "rough road, slam on the brakes. come off the brakes, accelerate" mode which is the only way to survive here.

So after expressing my generally negative view of mods, I think the fork mod I've read about to eliminate the banging might be a requirement! I'm not talking about an occasional top-out, I'm talking about some serious stutter-banging under certain conditions.

I have found that one way to reduce/eliminate it is to slow down! So maybe I should consider that.

Naw, that' aint' happenin! smile

Maybe some 50 wt fork oil...

Support Your #1 BritBike Forum!

Check out British motorcycles for sale:
British Motorcycles on e-Bay UK, British motorcycles on e-Bay North America
Check out British motorcycles for sale:
British Motorcycles on e-Bay UK, British motorcycles on e-Bay North America
Re: Front fork Mod - 850 Commando #73400
02/04/08 4:29 am
02/04/08 4:29 am
Joined: Feb 2004
Posts: 1,956
Flint,Mich
norbsa48503 Offline
BritBike Forum member
norbsa48503  Offline
BritBike Forum member
Joined: Feb 2004
Posts: 1,956
Flint,Mich
Mike if you like you can PM me I have about 100 fork kits out there.


norbsa
1960 TR6
1963 Super Rocket
1965 650 Star
1966 441
1968 Thunderbolt
1969 Twinkle 250
1972 Fastback
1974 Roadster
1970 S.S
Way too many BSA's not named
http://decentcycles.com
Re: Front fork Mod - 850 Commando #73401
02/04/08 2:47 pm
02/04/08 2:47 pm
Joined: May 2007
Posts: 358
Regina Sk, Canada
Coco Offline
BritBike Forum member
Coco  Offline
BritBike Forum member
Joined: May 2007
Posts: 358
Regina Sk, Canada
There is a place called Cosentino Engineering (pretty sure that is the name)thatr makes a complete drop in cartridge replacement using internals from new Showa forks I believe that gives you compression and rebound dampening adjustments. The kit does however cost about $750. I'm just using a stock set up with the covenant type mod which I think is what Norbsa is eluding to with his kit. $750 is a bit much for me but we'll see what kind of tax return I get this year.


Colin
--------------------------
1975 MKIII Norton Commando
'73/'70 Triumph 750 chop in the works
Re: Front fork Mod - 850 Commando #73402
02/04/08 3:43 pm
02/04/08 3:43 pm
Joined: Feb 2004
Posts: 1,956
Flint,Mich
norbsa48503 Offline
BritBike Forum member
norbsa48503  Offline
BritBike Forum member
Joined: Feb 2004
Posts: 1,956
Flint,Mich
Coco, Putting words in other people's mouthes is never a good thing. My kit may not be for everyone but it is far opposite from a covenant mod. At 65.00 plus shipping it works well but is not a drop in 750.00 modern update. My kit requires the user to do a bit of work,You may have to buy new stock dampener tube caps and seals,modify other parts to get it all working right, some adjusting,some thinking. It was made by and for Commando owners who do their own work. Two years were spent just making sure it field tested in three bikes before offering it. The three of us had all tried the covenant kit and were not happy with it.


norbsa
1960 TR6
1963 Super Rocket
1965 650 Star
1966 441
1968 Thunderbolt
1969 Twinkle 250
1972 Fastback
1974 Roadster
1970 S.S
Way too many BSA's not named
http://decentcycles.com
Re: Front fork Mod - 850 Commando #73403
02/04/08 5:27 pm
02/04/08 5:27 pm
Joined: May 2007
Posts: 358
Regina Sk, Canada
Coco Offline
BritBike Forum member
Coco  Offline
BritBike Forum member
Joined: May 2007
Posts: 358
Regina Sk, Canada
Quote:
Originally posted by norbsa48503:
Coco, Putting words in other people's mouthes is never a good thing. My kit may not be for everyone but it is far opposite from a covenant mod. At 65.00 plus shipping it works well but is not a drop in 750.00 modern update. My kit requires the user to do a bit of work,You may have to buy new stock dampener tube caps and seals,modify other parts to get it all working right, some adjusting,some thinking. It was made by and for Commando owners who do their own work. Two years were spent just making sure it field tested in three bikes before offering it. The three of us had all tried the covenant kit and were not happy with it.
My apologies. I thought your kit was or is similar in concept to the Covenant mod and I don't doubt that a lot of work has gone into engineering your kit.

I was basically telling the poster to either go with your kit, or the extra and more extravagent option of a drop in cartridge.


Colin
--------------------------
1975 MKIII Norton Commando
'73/'70 Triumph 750 chop in the works
Re: Front fork Mod - 850 Commando #73404
02/04/08 7:23 pm
02/04/08 7:23 pm
Joined: Sep 2006
Posts: 609
Mexico City, Mexico
MexicoMike Offline OP
BritBike Forum member
MexicoMike  Offline OP
BritBike Forum member
Joined: Sep 2006
Posts: 609
Mexico City, Mexico
Norbsa, I sent you an email.

Further to all this, I have done a lot of web searching and found a variety of "fixes" for this problem. One "solution," which is found in the Norton manual as one of the recommendations for the forks is 20/50 engine oil. This morning I drained my ATF/40 wt mix "fork oil" and put 20/50 castrol (same as in engine) in the front forks and took her out for a ride. WHAT AN IMPROVEMENT! There is NO banging over the same bumps that produced serious banging yesterday. I tried all the same speed/throttle/brake application that I did yesterday. Nothing...

Obviously the fork action is stiffer but frankly it is not all that much stiffer and it is much better over sharp bumps like small potholes and other pavement irregularities. The overall ride is actually smother.

I'm still interested in the kit but I'm quite pleased with what a simple change of oil accomplished.

Re: Front fork Mod - 850 Commando #73405
02/04/08 7:31 pm
02/04/08 7:31 pm
Joined: May 2007
Posts: 358
Regina Sk, Canada
Coco Offline
BritBike Forum member
Coco  Offline
BritBike Forum member
Joined: May 2007
Posts: 358
Regina Sk, Canada
Mike, have you tried a Progressive Suspension spring replacement also? That was the first improvement I made to the forks.

That coupled with Norbsa's kit and some heavier weight fork oil would probably do the trick.


Colin
--------------------------
1975 MKIII Norton Commando
'73/'70 Triumph 750 chop in the works
Re: Front fork Mod - 850 Commando #73406
02/04/08 8:15 pm
02/04/08 8:15 pm
Joined: Sep 2006
Posts: 609
Mexico City, Mexico
MexicoMike Offline OP
BritBike Forum member
MexicoMike  Offline OP
BritBike Forum member
Joined: Sep 2006
Posts: 609
Mexico City, Mexico
No - I haven't made any modification to the suspension other than rebuilding the oem forks and fooling with fork oil wt. I will consider internal fork mods but I wouldn't consider fork mods that would show on the outside as being other than oem.

To show my hypocrite-ness on this issue, I don't object to a Norman Hyde fork brace (though it's butt-ugly) even though it isn't oem. But it looks Norton-esque in it's cobbled up nature and it has become sort of "traditional," like Dunstall parts. I removed the Hyde brace from my bike when I bought it. But, like the steering damper, which I removed/reinstalled, I'm wondering if the brace might also be helpful here...

Maybe the PO new what he was doing! wink

Re: Front fork Mod - 850 Commando #73407
02/04/08 9:39 pm
02/04/08 9:39 pm
Joined: Feb 2004
Posts: 1,956
Flint,Mich
norbsa48503 Offline
BritBike Forum member
norbsa48503  Offline
BritBike Forum member
Joined: Feb 2004
Posts: 1,956
Flint,Mich
It's too bad RGM doesn't make their for brace any more it looks much nicer. Mike a very good brake is reason enough to refit the brace you have, a slow motion camera shot of the flexing would convince you in a heart beat. They complement my kits well because the extra travel comes from the bushing running closer to one another.


norbsa
1960 TR6
1963 Super Rocket
1965 650 Star
1966 441
1968 Thunderbolt
1969 Twinkle 250
1972 Fastback
1974 Roadster
1970 S.S
Way too many BSA's not named
http://decentcycles.com
Re: Front fork Mod - 850 Commando #73408
02/04/08 10:36 pm
02/04/08 10:36 pm
Joined: May 2007
Posts: 358
Regina Sk, Canada
Coco Offline
BritBike Forum member
Coco  Offline
BritBike Forum member
Joined: May 2007
Posts: 358
Regina Sk, Canada
Quote:
Originally posted by norbsa48503:
It's too bad RGM doesn't make their for brace any more it looks much nicer. Mike a very good brake is reason enough to refit the brace you have, a slow motion camera shot of the flexing would convince you in a heart beat. They complement my kits well because the extra travel comes from the bushing running closer to one another.
Hyde stopped making the Commando fork brace as well, which is a bummer because I was looking to buy one. I have never seen the RGM you speak of.


Colin
--------------------------
1975 MKIII Norton Commando
'73/'70 Triumph 750 chop in the works
Re: Front fork Mod - 850 Commando #73409
02/04/08 10:41 pm
02/04/08 10:41 pm
Joined: Sep 2006
Posts: 609
Mexico City, Mexico
MexicoMike Offline OP
BritBike Forum member
MexicoMike  Offline OP
BritBike Forum member
Joined: Sep 2006
Posts: 609
Mexico City, Mexico
OK, OK...I'll put the Hyde brace back on tomorrow! smile

Re: Front fork Mod - 850 Commando #73410
02/04/08 11:08 pm
02/04/08 11:08 pm
Joined: Jun 2007
Posts: 5,993
Maui Hawaii
HawaiianTiger Online content
BritBike Forum member
HawaiianTiger  Online Content
BritBike Forum member
Joined: Jun 2007
Posts: 5,993
Maui Hawaii
MM,
Did you use Syntech in your forks? I use 20/50 Syntech and the "stiction" disappeared. Very smooth. Since I put a steering damper on my bike I've been thinking about a lower viscosity oil.
Anyway, they way I see it, when you finally get your suspension dialed in you won't notice it at all anymore. Oh, btw, rear suspesion can affect the front and vice/versa I suppose you know that already. I've had two sets of units(one S&W and one Hagon) go bad in the back and that will pucker your shorts for sure. A very scary ride, that. And I ride on smooth roads.
Bill


Bikes
1974 Commando
1985 Honda Nighthawk 650
1957 Thunderbird/T110 "Flying Tiger"
Antique Fans: Loads of Emersons (Two six wingers) plus gyros and orbiters.
Re: Front fork Mod - 850 Commando #73411
02/05/08 1:47 am
02/05/08 1:47 am
Joined: Jan 2006
Posts: 7,058
Laredo (South) Texas, USA
GrandPaul Offline
BritBike Forum member
GrandPaul  Offline
BritBike Forum member
Joined: Jan 2006
Posts: 7,058
Laredo (South) Texas, USA
Is this the RGM fork brace?



GrandPaul (does not use emoticons)
Author of the book "Old Bikes"
Too many bikes to list, mostly Triumph & Norton, some BSA & European
"The Iron in your blood should be Vintage"
Re: Front fork Mod - 850 Commando #73412
02/05/08 5:08 am
02/05/08 5:08 am
Joined: Feb 2004
Posts: 1,956
Flint,Mich
norbsa48503 Offline
BritBike Forum member
norbsa48503  Offline
BritBike Forum member
Joined: Feb 2004
Posts: 1,956
Flint,Mich
No that's that's not RGM. They are a smooth alum. rectangular bar cast to fit tightly over the stock fender very clean and simple with nice large supports for the extra bushings these can be adjusted with an eccentric to move freely. The only fault was the seals way too heavy duty and non floating as well.


norbsa
1960 TR6
1963 Super Rocket
1965 650 Star
1966 441
1968 Thunderbolt
1969 Twinkle 250
1972 Fastback
1974 Roadster
1970 S.S
Way too many BSA's not named
http://decentcycles.com
Re: Front fork Mod - 850 Commando #73413
02/06/08 10:46 pm
02/06/08 10:46 pm
Joined: Sep 2006
Posts: 609
Mexico City, Mexico
MexicoMike Offline OP
BritBike Forum member
MexicoMike  Offline OP
BritBike Forum member
Joined: Sep 2006
Posts: 609
Mexico City, Mexico
GP, that's a gorgeous cafe racer! Back when I owned a then almost new '71 commando I wanted to turn it into a CR but all I ever did was get a handlebar fairing for it.

Is that your bike? Where could I get the parts to make my Commando look like that? TOO COOL!

Yes, I realize I'm hijacking the thread but in the spirit of KommandoKenny, I started the thread so it's mine to hijack! smile

Re: Front fork Mod - 850 Commando #73414
02/06/08 11:52 pm
02/06/08 11:52 pm
Joined: Jan 2004
Posts: 1,106
McKellar,Ontario
Kommandokenny Offline
BritBike Forum member
Kommandokenny  Offline
BritBike Forum member
Joined: Jan 2004
Posts: 1,106
McKellar,Ontario
HAHA HARDY HAR HAR

Mike for an oem kinda guy...... I'm thinking your doing a little flip flopin? :p

Clubman has some cafe parts bigt


If Norton made an airplane,would you fly in it?
Re: Front fork Mod - 850 Commando #73415
02/07/08 12:00 am
02/07/08 12:00 am
Joined: Sep 2006
Posts: 609
Mexico City, Mexico
MexicoMike Offline OP
BritBike Forum member
MexicoMike  Offline OP
BritBike Forum member
Joined: Sep 2006
Posts: 609
Mexico City, Mexico
OEM/Cafe Racer...I don't see that as flip-flopping. I prefer to view it as, "I feel strongly both ways!" smile

I looked at Clubmans; there's a nice CR type fairing there but it won't take a headlight which won't work for me.

Re: Front fork Mod - 850 Commando #73416
02/08/08 4:55 pm
02/08/08 4:55 pm
Joined: Feb 2004
Posts: 89
the wilderness
old-grizz Offline
BritBike Forum member
old-grizz  Offline
BritBike Forum member
Joined: Feb 2004
Posts: 89
the wilderness
Say what you will, I kinda like the looks of the one on GP's CR - who makes/made that one?

These guys have a "universal" (previously defined as "fits nothing") fork brace at a good price - don't have one myself, so can't testify to quality or applicability . . .

Allyn Air Co.
30 Millstream Road
Woodstock, NY 12498
845-679-2051

-O.G.

Re: Front fork Mod - 850 Commando #73417
02/08/08 4:58 pm
02/08/08 4:58 pm
Joined: Feb 2004
Posts: 89
the wilderness
old-grizz Offline
BritBike Forum member
old-grizz  Offline
BritBike Forum member
Joined: Feb 2004
Posts: 89
the wilderness
Lesson Learned - be careful when you use indefinite pronouns . . .

By "one", I was referring to the fork brace, not the fairing. My post was regarding fork braces only. I am looking for a good and good looking fork brace for my Interstate.

-O.G.

Re: Front fork Mod - 850 Commando #73418
02/08/08 7:21 pm
02/08/08 7:21 pm
Joined: Jun 2007
Posts: 5,993
Maui Hawaii
HawaiianTiger Online content
BritBike Forum member
HawaiianTiger  Online Content
BritBike Forum member
Joined: Jun 2007
Posts: 5,993
Maui Hawaii
That looks like Ducati 900ss fairing to me. Makes me rear end pucker just to think of what that might cost, tho.
Bill


Bikes
1974 Commando
1985 Honda Nighthawk 650
1957 Thunderbird/T110 "Flying Tiger"
Antique Fans: Loads of Emersons (Two six wingers) plus gyros and orbiters.
Re: Front fork Mod - 850 Commando #73419
02/19/08 8:07 pm
02/19/08 8:07 pm
Joined: Jun 2007
Posts: 64
Boston
B
BrianK Offline
BritBike Forum member
BrianK  Offline
BritBike Forum member
B
Joined: Jun 2007
Posts: 64
Boston
That looks like a Telefix fork brace from an old airhead BMW. Looks darned good to me.

Re: Front fork Mod - 850 Commando #73420
02/20/08 12:37 pm
02/20/08 12:37 pm
Joined: Oct 2007
Posts: 234
Ohio
Ron Leisner Offline
BritBike Forum member
Ron Leisner  Offline
BritBike Forum member
Joined: Oct 2007
Posts: 234
Ohio
Quote:
That looks like a Telefix fork brace from an old airhead BMW. Looks darned good to me.
I think you mean the CC brace from San Jose BMW. The Telefix is cast aluminum.

I was told that Norman Hyde may be doing another run of their braces, but no estimate as to when they might be available.

British Cycle Supply is investigating a possible source of a similar brace. (RGM?)


Ron L
1973 MkV 750 Roadster
1974 850 Interstate
1975 850 Cafe Racer
1968 750 Fastback
1967 P11
1969 Ranger 750
Re: Front fork Mod - 850 Commando #73421
02/20/08 1:48 pm
02/20/08 1:48 pm
Joined: Feb 2004
Posts: 1,956
Flint,Mich
norbsa48503 Offline
BritBike Forum member
norbsa48503  Offline
BritBike Forum member
Joined: Feb 2004
Posts: 1,956
Flint,Mich
Ron, lets hope that BCS has the insight to change out the stanchion killing seal system in an otherwise perfect fork brace. Long live Leak proof.


norbsa
1960 TR6
1963 Super Rocket
1965 650 Star
1966 441
1968 Thunderbolt
1969 Twinkle 250
1972 Fastback
1974 Roadster
1970 S.S
Way too many BSA's not named
http://decentcycles.com
Re: Front fork Mod - 850 Commando #73422
02/20/08 2:36 pm
02/20/08 2:36 pm
Joined: Apr 2005
Posts: 243
Northern Virginia
V
VA Rebel Offline
BritBike Forum member
VA Rebel  Offline
BritBike Forum member
V
Joined: Apr 2005
Posts: 243
Northern Virginia
Ron L is right. That looks like a fork brace made by CC products.

Re: Front fork Mod - 850 Commando #73423
02/21/08 3:37 pm
02/21/08 3:37 pm
Joined: May 2007
Posts: 358
Regina Sk, Canada
Coco Offline
BritBike Forum member
Coco  Offline
BritBike Forum member
Joined: May 2007
Posts: 358
Regina Sk, Canada
Quote:
Originally posted by norbsa48503:
Ron, lets hope that BCS has the insight to change out the stanchion killing seal system in an otherwise perfect fork brace. Long live Leak proof.
Are you referiing to the Hyde Brace?

Does the brace do something to the stanchions?

I am seriously about to buy one of the Hyde braces as I found a retailer with one left, so any info you have would be great.


Colin
--------------------------
1975 MKIII Norton Commando
'73/'70 Triumph 750 chop in the works
Page 1 of 2 1 2

Moderated by  Dave Comeau 


Home | Sponsors | Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons | "OLD" BritBike Forum | DVD- Manuals & Parts books | BritBike Stickers & Decals
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
Powered by UBB.threads™ PHP Forum Software 7.6.1.1