A set of "The Magicals" progressive fork springs arrived today, should the tight would coils go to the top or bottom?
Steve
TLR 250 Fork Springs
Moderator: Moderators
TLR 250 Fork Springs
Sharvie ~ Maitland NSW
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eagle
- A grade participant

- Posts: 126
- Joined: Sun Jul 12, 2009 1:55 pm
- Club: oakleigh
- Bike: honda tlr 250
- Location: Nyora
Re: TLR 250 Fork Springs
In manual the tight wind goes to the top, what are the magicals? are they after market?
Re: TLR 250 Fork Springs
The Magicals have a whole range of Twinshock suspension mods/updates see here http://www.themagicals.co.uk/
Steve
Steve
Sharvie ~ Maitland NSW
-
David Lahey
- Champion

- Posts: 4118
- Joined: Thu Jun 05, 2003 7:01 pm
- Club: CQTC Inc, RTC Inc
- Bike: Many Twinshocks
- Location: Gladstone, Queensland
Re: TLR 250 Fork Springs
Steve it is anally rententive in the extreme to care about this sort of thing but I admit to having thought about this issue when dropping in TY250 and TY175 fork springs, which also have a close-wound section at one end.
The reason for having the close-wound section at the top is to minimise unsprung mass - the top end of the spring is completely sprung mass and the bottom end of the spring is completely unsprung mass, and everything in between is a combination of sprung and unsprung mass in proportion to how far that part is from each end. The close-wound section is the heaviest part of the spring so by having it at the top, the amount of unsprung mass is minimised. As the forks compress and the close-wound section becomes coil-bound, the benefit is further magnified.
The overall effect is tiny but real.
In the same way it is also a benefit to have shockies with the heavy end (usually the body) attached to the frame.
Another extremely anally-retentive aspect to consider is that the centre-of-gravity of the bike is ever-so-slightly raised by having the close-wound section at the top.
The reason for having the close-wound section at the top is to minimise unsprung mass - the top end of the spring is completely sprung mass and the bottom end of the spring is completely unsprung mass, and everything in between is a combination of sprung and unsprung mass in proportion to how far that part is from each end. The close-wound section is the heaviest part of the spring so by having it at the top, the amount of unsprung mass is minimised. As the forks compress and the close-wound section becomes coil-bound, the benefit is further magnified.
The overall effect is tiny but real.
In the same way it is also a benefit to have shockies with the heavy end (usually the body) attached to the frame.
Another extremely anally-retentive aspect to consider is that the centre-of-gravity of the bike is ever-so-slightly raised by having the close-wound section at the top.
relax, nothing is under control
Re: TLR 250 Fork Springs
Thanks David, I hope to get the spring fitted over the Christmas break.
Eagle, It would be great to see pics of another TLR. Also share any mods you have carried out.
Steve
Eagle, It would be great to see pics of another TLR. Also share any mods you have carried out.
Steve
Sharvie ~ Maitland NSW
