Shortening front forks.
in [Tech]
|
From: The Older Gentleman on 23 Oct 2009 18:44 little man upon the stair <macmiled(a)gmail.com> wrote: > On Oct 23, 11:31 am, totallydeadmail...(a)yahoo.co.uk (The Evil Clown) > wrote: > > > You know nothing. > > You prove that you know less every time you challenge an obvious fact. Nope, sweetie-pie. Wrong again. -- BMW K1100LT Ducati 750SS Honda CB400F Triumph Street Triple Suzuki TS250ER (currently Beaving) Damn, back to five bikes! Try Googling before asking a damn silly question. chateau dot murray at idnet dot com
From: little man upon the stair on 23 Oct 2009 19:25 On Oct 23, 3:44�pm, totallydeadmail...(a)yahoo.co.uk (The Importunate Cottager) pled: > Nope, sweetie-pie. Wrong again. It doesn't matter how much you beg, I'm not going to explain the effects of vibrational frequency on traction as regards rubber tires beyond saying that, when the vibration stops, you're about to crash.
From: The Older Gentleman on 24 Oct 2009 03:34 little man upon the stair <macmiled(a)gmail.com> wrote: > On Oct 23, 3:44?pm, totallydeadmail...(a)yahoo.co.uk (The Importunate > Cottager) pled: > > > Nope, sweetie-pie. Wrong again. > > It doesn't matter how much you beg, I'm not going to explain the > effects of > vibrational frequency on traction as regards rubber tires beyond > saying that, when the vibration stops, you're about to crash. Right. So all small-wheeled bikes are dangerous. Do you have a minimum size that you consider to be safe? If so, what? We need to know. -- BMW K1100LT Ducati 750SS Honda CB400F Triumph Street Triple Suzuki TS250ER (currently Beaving) Damn, back to five bikes! Try Googling before asking a damn silly question. chateau dot murray at idnet dot com
From: little man upon the stair on 24 Oct 2009 09:17 On Oct 24, 12:34 am, totallydeadmail...(a)yahoo.co.uk (The Importunate Sniveller) wrote: > Do you have a minimum size that you consider to be safe? If so, what? We > need to know. Who's this "we" you're referring to? Are you in bed with Spacker again?
From: Greg.Procter on 24 Oct 2009 21:18
On Sat, 24 Oct 2009 03:37:32 +1300, paul c <toledobythesea(a)oohay.ac> wrote: > Greg.Procter wrote: >> On Fri, 23 Oct 2009 15:36:43 +1300, little man upon the stair >> <macmiled(a)gmail.com> wrote: >> >>> On Oct 22, 7:22 pm, "Greg.Procter" <proc...(a)ihug.co.nz> wrote: >>> >>>> Adapting "X" axle and wheel to "Y" forks is no problem. >>>> I could equally design completely new forks and machine them, >>>> but if existing forks could be shortened it would cut costs >>>> drastically. >>> >>> You'd have to adapt a smaller diameter scooter wheel (maybe a 12~14 >>> incher) to any motorcycle fork that you might find. >>> >>> The typical small motorcycle front wheel just wouldn't fit under the >>> front "fender" of an NZeta... >>> >>> http://en.wikipedia.org/wiki/%C4%8Cezeta >>> >> The original wheel is sufficient - 12" and there's just room for >> two yokes below the head. Machining up yokes is not a problem >> and gives me the chance to increase the trail. (curreently 75mm/3") >> Modifying other forks would make fitting a disk brake easy. >> Didn't think of Wikipaedia, must have a look! > > (Thanks for the marque name, interesting photos here and there on the > web. I've never seen a Cezeta/Nzeta in person but it reminds of a number > of Euro scoots from that era.) I was wondering if you'd have to change > rake and therefore trail, maybe better high-speed stability is what you > have in mind but personally I wouldn't want to change the low-speed > behaviour. If the main goal is stronger braking, an alternative might > be to consider beefing up the stock forks to mount a disc and caliper, > maybe similar to the way the leading-link Ural models do it, plus > possibly heavier shock and spring since they probably need replacement > anyway. I think changing the rake would be more than I'm prepared to attempt, given that it's set by and within the body structure. It shouldn't be hard to increase the trail a fraction. (it's 75mm/3") Either making new and extended leading links or triple plates if I go with alternative front forks. The "Y" fork structure might be rigid enough, but I'm only going to find out at the worst possible moments! The standard spring/damper units are simply CZ long travel rear spring/damper units and presumably will be long past their prime. Greg.P. |