Fork Springs

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MarkB
Posts: 673
Joined: 22 Jun 2009 13:14
Location: Stevenage

Fork Springs

Post by MarkB »

My drum brake Strada has Paioli forks, which have 500mm springs, (at least, that's the length of the old ones, which might have compressed a bit) and don't have any spacers. NLM only have 460mm springs, which I presume are for Marzocchi forks. If I fit 460mm springs and make up some 40mm spacers, will the fork action be the same as with 500mm and no spacers?

Thanks for any advice

Mark
"I'll have a V please, Bob."
stillooking
Posts: 82
Joined: 12 Mar 2008 22:58

Re: Fork Springs

Post by stillooking »

Re. "If I fit 460mm springs and make up some 40mm spacers, will the fork action be the same as with 500mm and no spacers? "

I would say the answer to that question is no, I'm not an expert, but I would've thought that the suspension would have slightly less travel but more 'pre-load'.

I think this may have been discussed on the board before, so perhaps do a search.

If that doesn't answer yr question I can send you some links that I've bookmarked, which are quite helpful.
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72degrees
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Joined: 31 Aug 2007 21:24
Location: West Midlands

Re: Fork Springs

Post by 72degrees »

On the Rotarini (Rotax 250 MX in a Morini frame) I found standard Marzocchi springs and spacers too 'heavy' as it was much lighter than a 350 Morini. No progressive fork springs avaialable then (1988) so I took out the spacers and replaced them with a pair of old Morini valve springs in each leg (having put new ones and WeeVee whizzo light alloy capsin the 375 motor).
EVguru
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Joined: 01 Aug 2006 11:13
Location: Luton
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Re: Fork Springs

Post by EVguru »

If you go to someone like Hagon, they can supply springs tailored to the weight of bike+rider.

You then need to set the 'static sag' and determine the length of spacer;

http://www.sportrider.com/tech/146_0308 ... index.html
Paul Compton
http://www.morini-mania.co.uk
http://www.youtube.com/user/EVguru
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MarkB
Posts: 673
Joined: 22 Jun 2009 13:14
Location: Stevenage

Re: Fork Springs

Post by MarkB »

Thanks for the replies: I'll give Hagon a call and see what they recommend. I'm currently using Hagon progressive springs, but they feel far too sensitive at the early stages of braking (even though I am careful not to grab the brake, Paul :wink: )

Stillooking: if you've got any links you could post here for our benefit, that would be really helpful.

Regards, Mark.
"I'll have a V please, Bob."
Ralph
Posts: 226
Joined: 31 Jan 2009 10:12
Location: Fylde Coast NW United Kingdom

Re: Fork Springs

Post by Ralph »

You could try these people they know what they are about but I have only dealt with them re Suzuki and Yamaha
but it may be worth a ring.

http://www.maxtonsuspension.co.uk/
Ralph
1975 Strada 3 1/2
Knott End NW UK

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