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#73399 - 02/03/08 8:39 pm Front fork Mod - 850 Commando  
Joined: Sep 2006
Posts: 609
MexicoMike Offline
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MexicoMike  Offline
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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...

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#73400 - 02/04/08 4:29 am Re: Front fork Mod - 850 Commando  
Joined: Feb 2004
Posts: 1,956
norbsa48503 Offline
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norbsa48503  Offline
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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
#73401 - 02/04/08 2:47 pm Re: Front fork Mod - 850 Commando  
Joined: May 2007
Posts: 358
Coco Offline
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Coco  Offline
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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
#73402 - 02/04/08 3:43 pm Re: Front fork Mod - 850 Commando  
Joined: Feb 2004
Posts: 1,956
norbsa48503 Offline
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norbsa48503  Offline
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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
#73403 - 02/04/08 5:27 pm Re: Front fork Mod - 850 Commando  
Joined: May 2007
Posts: 358
Coco Offline
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Coco  Offline
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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
#73404 - 02/04/08 7:23 pm Re: Front fork Mod - 850 Commando  
Joined: Sep 2006
Posts: 609
MexicoMike Offline
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MexicoMike  Offline
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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.

#73405 - 02/04/08 7:31 pm Re: Front fork Mod - 850 Commando  
Joined: May 2007
Posts: 358
Coco Offline
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Coco  Offline
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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
#73406 - 02/04/08 8:15 pm Re: Front fork Mod - 850 Commando  
Joined: Sep 2006
Posts: 609
MexicoMike Offline
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MexicoMike  Offline
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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

#73407 - 02/04/08 9:39 pm Re: Front fork Mod - 850 Commando  
Joined: Feb 2004
Posts: 1,956
norbsa48503 Offline
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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
#73408 - 02/04/08 10:36 pm Re: Front fork Mod - 850 Commando  
Joined: May 2007
Posts: 358
Coco Offline
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Coco  Offline
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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
#73409 - 02/04/08 10:41 pm Re: Front fork Mod - 850 Commando  
Joined: Sep 2006
Posts: 609
MexicoMike Offline
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MexicoMike  Offline
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Posts: 609
Mexico City, Mexico
OK, OK...I'll put the Hyde brace back on tomorrow! smile

#73410 - 02/04/08 11:08 pm Re: Front fork Mod - 850 Commando  
Joined: Jun 2007
Posts: 5,461
HawaiianTiger Online content
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HawaiianTiger  Online Content

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Joined: Jun 2007
Posts: 5,461
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.
#73411 - 02/05/08 1:47 am Re: Front fork Mod - 850 Commando  
Joined: Jan 2006
Posts: 6,645
GrandPaul Online content
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GrandPaul  Online Content
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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"
#73412 - 02/05/08 5:08 am Re: Front fork Mod - 850 Commando  
Joined: Feb 2004
Posts: 1,956
norbsa48503 Offline
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norbsa48503  Offline
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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
#73413 - 02/06/08 10:46 pm Re: Front fork Mod - 850 Commando  
Joined: Sep 2006
Posts: 609
MexicoMike Offline
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MexicoMike  Offline
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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

#73414 - 02/06/08 11:52 pm Re: Front fork Mod - 850 Commando  
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Posts: 1,106
Kommandokenny Offline
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Kommandokenny  Offline
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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?
#73415 - 02/07/08 12:00 am Re: Front fork Mod - 850 Commando  
Joined: Sep 2006
Posts: 609
MexicoMike Offline
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MexicoMike  Offline
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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.

#73416 - 02/08/08 4:55 pm Re: Front fork Mod - 850 Commando  
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Posts: 89
old-grizz Offline
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old-grizz  Offline
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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.

#73417 - 02/08/08 4:58 pm Re: Front fork Mod - 850 Commando  
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old-grizz Offline
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old-grizz  Offline
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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.

#73418 - 02/08/08 7:21 pm Re: Front fork Mod - 850 Commando  
Joined: Jun 2007
Posts: 5,461
HawaiianTiger Online content
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HawaiianTiger  Online Content

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Joined: Jun 2007
Posts: 5,461
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.
#73419 - 02/19/08 8:07 pm Re: Front fork Mod - 850 Commando  
Joined: Jun 2007
Posts: 64
BrianK Offline
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BrianK  Offline
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Posts: 64
Boston
That looks like a Telefix fork brace from an old airhead BMW. Looks darned good to me.

#73420 - 02/20/08 12:37 pm Re: Front fork Mod - 850 Commando  
Joined: Oct 2007
Posts: 234
Ron Leisner Offline
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Ron Leisner  Offline
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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
#73421 - 02/20/08 1:48 pm Re: Front fork Mod - 850 Commando  
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Posts: 1,956
norbsa48503 Offline
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norbsa48503  Offline
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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
#73422 - 02/20/08 2:36 pm Re: Front fork Mod - 850 Commando  
Joined: Apr 2005
Posts: 242
VA Rebel Offline
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VA Rebel  Offline
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Joined: Apr 2005
Posts: 242
Northern Virginia
Ron L is right. That looks like a fork brace made by CC products.

#73423 - 02/21/08 3:37 pm Re: Front fork Mod - 850 Commando  
Joined: May 2007
Posts: 358
Coco Offline
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Coco  Offline
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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
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