G oog le BadWeB | Login/out | Topics | Search | Custodians | Register | Edit Profile


Buell Motorcycle Forum » Old School Buell » Archive through March 30, 2008 » Suspension work - M2 « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

Cbig
Posted on Tuesday, March 25, 2008 - 12:13 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I recently bought a M2 and I think the suspension is really harsh - especially the square edged bumps and freeway seems - can this or has this been fixed by Racetech in the forks and a revalve on the stock showa shock? Trying to save money here by not buying the lightning forks and a Penske...

I didn't remember it being this harsh - also think it needs new springs up front? I don't see it using more than an inch or so of travel on most occasions...might be riding low in the travel from what it seams..

thanks!
Top of pagePrevious messageNext messageBottom of page Link to this message

Bott
Posted on Tuesday, March 25, 2008 - 12:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Have you tried adjusting? Rebound and compression on rear, and i believe its compression only on the forks. Also preload on the rear may be set too hard for your weight. just a thought....
Top of pagePrevious messageNext messageBottom of page Link to this message

Djkaplan
Posted on Tuesday, March 25, 2008 - 12:49 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The only damping adjustment on a stock M2 fork is for rebound (you are supposed to fine tune compression damping by varying fork oil level... and weight).

The damping and spring rates don't match-up too well on a stock M2 fork, however. I feel the same damping harshness you describe, but the lack of suspension travel is puzzling. Check you fork oil level (I think the range is 3.25-4.25 inches, but check a service manual to be sure) and front sag (1.0"-1.5"). Also take a nylon quick-tie and wrap it around the right fork stancion. When you check sag, the nylon wrap tells you exactly how much you have and it'll tell you how much travel you are indeed using when you ride.
Top of pagePrevious messageNext messageBottom of page Link to this message

Cbig
Posted on Tuesday, March 25, 2008 - 01:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

DJ-
I have adjusted
I did check that - the spec on the bike is 4.5 inches of travel if I remember. If I sag 1.5 - 1.75 (which is what I think I measured it at - I weigh 200 lbs..) 4.5-1.7 = 2.8 inches of travel. Not a lot left for bridge joints, cracks of an inch or more..
If I'm riding low in the stroke, I'm also increasing the "air spring" compression effect, and I think seriously the front fork and the back need a revalve for those sharp edged bumps. It's harsh. I rode a xb1200tt - with the 5.7 suspenders on it - what a nice ride!

I guess I'm asking is - has a revalve and front respring done it for ya? If so how much$$?
Top of pagePrevious messageNext messageBottom of page Link to this message

Djkaplan
Posted on Tuesday, March 25, 2008 - 02:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Your sag is too low, with your weight, you might have the adjusters maxed out already. I cut some longer spring preload spacers (my all up riding weight is probably 180lbs) so I could get my sag set at 1" without having to max out the preload adjusters. Even with the sag set at minimum, the stock spring rate is just too low for anyone over 160lbs. I think getting the correct weight springs up front for your riding weight is a good idea. I haven't gotten a revalve kit yet, can't help you there, but I bet a stiffer spring rate up front would match the stock damping characteristics better.
Top of pagePrevious messageNext messageBottom of page Link to this message

Cbig
Posted on Tuesday, March 25, 2008 - 03:35 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yes - I checked reacetech's site - I need 90 springs, stock I think are 73 ... any info on whether the revalve with gold valves and the Aftershock revalve work ?
« Previous Next »

Add Your Message Here
Post:
Bold text Italics Underline Create a hyperlink Insert a clipart image

Username: Posting Information:
This is a private posting area. Only registered users and custodians may post messages here.
Password:
Options: Post as "Anonymous" (Valid reason required. Abusers will be exposed. If unsure, ask.)
Enable HTML code in message
Automatically activate URLs in message
Action:

Topics | Last Day | Tree View | Search | User List | Help/Instructions | Rules | Program Credits Administration