ADVrider

Go Back   ADVrider > Bikes > Old's Cool > Airheads
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 01-09-2013, 01:51 PM   #61
Ras Thurlo OP
Desert Lion
 
Ras Thurlo's Avatar
 
Joined: Aug 2010
Location: Hillcountry, Italy
Oddometer: 606
Quote:
Originally Posted by AntonLargiader View Post
In my experience, the GS is not a very good performer in this way and has less trail than any similar bike that I have noted. Your basic KTM or HP2 has 20+ mm more trail, meaning that when your front wheel bounces off that rock you get that much less leverage fighting your handlebar. BTDT; the Airhead GS is a real workout in rocks. It's 25 year old geometry based on 40 year old street bikes.
I have to admit that on the dirt I find the handlebars on the GS can be twitchy and when associated with road-stiff suspension a couple of times were almost torn out of my hands.

Is this down to geometry or the fact that I ride the GS slower than my EXC and therefore lack the directional momentum when say going through mud.

Would a steering damper help?
Ras Thurlo is offline   Reply With Quote
Old 01-10-2013, 01:43 AM   #62
Dmaster
Gnarly Adventurer
 
Dmaster's Avatar
 
Joined: Apr 2012
Location: Netherlands.
Oddometer: 233
Quote:
Originally Posted by Ras Thurlo View Post
I have to admit that on the dirt I find the handlebars on the GS can be twitchy and when associated with road-stiff suspension a couple of times were almost torn out of my hands.

Is this down to geometry or the fact that I ride the GS slower than my EXC and therefore lack the directional momentum when say going through mud.

Would a steering damper help?
IMO hell yeah!
Dmaster is offline   Reply With Quote
Old 01-10-2013, 01:56 AM   #63
Prutser
Studly Adventurer
 
Prutser's Avatar
 
Joined: Aug 2012
Location: The Dutch swamp
Oddometer: 940
Quote:
Originally Posted by naginalf View Post
I'm really sad to hear this. I thought perhaps that Slavens had this figured out with the skf fork seals and better bushings. But, with all of your work on getting the bushings right (have you tried the skf seals?), even with the overlap to get to the stock ride height, would you say that the WP48 forks would then be good, Prutser?

Damn, every time I read about a solution to problems on these forks, I find another problem. Starting to question it again.
I always use the SKF seals if they have them in the size I need. They are superb !

With the 270mm travel left after i shortened them my fork is good enough. But I just want something better.
__________________
BMW R100'91/R80'93/R75/6 R80ST'83/R65GS'87/GasGasTXT300/DouglasW20-1920

R100GS'91 (sold)
Prutser is online now   Reply With Quote
Old 01-10-2013, 01:57 AM   #64
Prutser
Studly Adventurer
 
Prutser's Avatar
 
Joined: Aug 2012
Location: The Dutch swamp
Oddometer: 940
Quote:
Originally Posted by dmaster View Post
imo hell yeah!

+1
__________________
BMW R100'91/R80'93/R75/6 R80ST'83/R65GS'87/GasGasTXT300/DouglasW20-1920

R100GS'91 (sold)
Prutser is online now   Reply With Quote
Old 01-30-2013, 10:21 PM   #65
Phreaky Phil
Beastly Adventurer
 
Joined: Mar 2006
Location: NEW ZEALAND
Oddometer: 1,733
Quote:
Originally Posted by Prutser View Post
We have been working on the drawings this afternoon

They will have more spread than the DRZ triples. 210mm.

When I know more I'll let you know Beater.
How are the new triples progressing ?
Phreaky Phil is offline   Reply With Quote
Old 01-30-2013, 11:55 PM   #66
Prutser
Studly Adventurer
 
Prutser's Avatar
 
Joined: Aug 2012
Location: The Dutch swamp
Oddometer: 940
Quote:
Originally Posted by Phreaky Phil View Post
How are the new triples progressing ?
Hi Phil,

We still need to make the drawing of the top triple, but need to find the time to do that.
__________________
BMW R100'91/R80'93/R75/6 R80ST'83/R65GS'87/GasGasTXT300/DouglasW20-1920

R100GS'91 (sold)
Prutser is online now   Reply With Quote
Old 02-20-2013, 09:06 AM   #67
Ras Thurlo OP
Desert Lion
 
Ras Thurlo's Avatar
 
Joined: Aug 2010
Location: Hillcountry, Italy
Oddometer: 606
Steering Dampers

Quote:
Originally Posted by Dmaster View Post
IMO hell yeah!
Is the consensus view that you need a steering damper for a GS off road?

What is the reason behind this, geometry, weight....


Could not find historic threads that spoke about this in relation to offroad riding- I'm sure its out there somewhere deep in a fork upgrade thread
Ras Thurlo is offline   Reply With Quote
Old 02-20-2013, 11:35 AM   #68
Lornce
Lost In Place
 
Lornce's Avatar
 
Joined: Aug 2003
Location: Way Out There.
Oddometer: 17,879
Can't get into this just now (I've got somewhere else I need to be!) but look forward to looking more closely at this thread as time permits.

Tuning motorcycle geometry for specific results is a lot simpler than most realise. I believe much confusion arrises from misunderstanding about which variables affect which characteristic.

The Short Version: Trail dimension is very important.

Talk soon.

Lornce is offline   Reply With Quote
Old 02-20-2013, 03:11 PM   #69
Dmaster
Gnarly Adventurer
 
Dmaster's Avatar
 
Joined: Apr 2012
Location: Netherlands.
Oddometer: 233
Quote:
Originally Posted by Ras Thurlo View Post
Is the consensus view that you need a steering damper for a GS off road?

What is the reason behind this, geometry, weight....


Could not find historic threads that spoke about this in relation to offroad riding- I'm sure its out there somewhere deep in a fork upgrade thread
Well you don't really NEED one. I rode mine almost a year without it (I'm not even riding 1,5 year offroad now ) but it helped allot to hold the cow go in a (sort of) straight line.
Especially when it gets tricky, some extra hands to hold the steer.
And i'm not even using a "off road" damper so maybe it could be better (or maybe not, I just never tried one)

I can't really figure out why you NEED one, i don't think there is a real reason. I don't think our bikes are more "dangerous" then similar bikes.
But I see more and more MX and enduro bikes with steering dampers on them. It just helps you control stuff you can't do your own.
Dmaster is offline   Reply With Quote
Old 02-20-2013, 03:30 PM   #70
Lornce
Lost In Place
 
Lornce's Avatar
 
Joined: Aug 2003
Location: Way Out There.
Oddometer: 17,879
Tony Foale

Don't know if it's been mentioned yet, but Tony Foale is an excellent resource if you're keen to understand motorcycle chassis and geometry design and characteristics.

No affiliation, just glad I read it so many years ago.

Lornce is offline   Reply With Quote
Old 02-20-2013, 03:40 PM   #71
Ras Thurlo OP
Desert Lion
 
Ras Thurlo's Avatar
 
Joined: Aug 2010
Location: Hillcountry, Italy
Oddometer: 606
Quote:
Originally Posted by Dmaster View Post
it helped allot to hold the cow go in a (sort of) straight line.
Especially when it gets tricky
I also find that there is a lot of movement on the bars compared to my EXC when the ground gets tricky

is there a downside to having one?
Ras Thurlo is offline   Reply With Quote
Old 02-20-2013, 03:44 PM   #72
Ras Thurlo OP
Desert Lion
 
Ras Thurlo's Avatar
 
Joined: Aug 2010
Location: Hillcountry, Italy
Oddometer: 606
Quote:
Originally Posted by Lornce View Post
Don't know if it's been mentioned yet, but Tony Foale is an excellent resource if you're keen to understand motorcycle chassis and geometry design and characteristics.
Ras Thurlo is offline   Reply With Quote
Old 02-20-2013, 03:49 PM   #73
Prutser
Studly Adventurer
 
Prutser's Avatar
 
Joined: Aug 2012
Location: The Dutch swamp
Oddometer: 940
Quote:
Originally Posted by Ras Thurlo View Post
I also find that there is a lot of movement on the bars compared to my EXC when the ground gets tricky

is there a downside to having one?
Yes there is a downside......They are expensive !
__________________
BMW R100'91/R80'93/R75/6 R80ST'83/R65GS'87/GasGasTXT300/DouglasW20-1920

R100GS'91 (sold)
Prutser is online now   Reply With Quote
Old 02-20-2013, 04:11 PM   #74
Lornce
Lost In Place
 
Lornce's Avatar
 
Joined: Aug 2003
Location: Way Out There.
Oddometer: 17,879
I've never felt the need for a steering damper on an airhead GS or G/S.

Might change my mind if I built a bike with too little trail.




Lornce is offline   Reply With Quote
Old 02-20-2013, 08:58 PM   #75
Phreaky Phil
Beastly Adventurer
 
Joined: Mar 2006
Location: NEW ZEALAND
Oddometer: 1,733
I would like to try a steering damper in sand. And on roads that have bulldust / silt / fesh fesh holes in them. Things can get ugly real quick when the bars whip around on you
Phreaky Phil is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 10:31 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014