jcr Posted June 12, 2023 Share Posted June 12, 2023 has anyone replaced theirs? mine have reached their service limit so looking for some new springs. looking at YSS offering their spring is 15mm shorter than my stock spring, 82mm compared to 97mm. and my year model(1996) is 10mm longer than the rest of the Aces which are 87mm. its all a bit confusing. will YSS be a straight swap even though they are shorter and do i follow the instructions for the 97 year onwards models regarding oil quantities etc? Link to comment Share on other sites More sharing options...
Moderator Snakebite68 Posted June 12, 2023 Moderator Share Posted June 12, 2023 96s have longer fork springs than other years? I wasn't aware that there were ANY differences between the years, the Ace was a parts bin bike... How strange... But wait, 97mm? That's less than 10cm! Have you messed up mm with cm there? Or did you mean 282mm, 297mm & 287mm? I've just had a rummage on Fowlers, as far as I can see, they've all got the same spring (same part number (4SV-23141-00))... I found this: Yamaha City - YAMAHA SPRING, FRONT FORK (4SV-23141-00) HOLY CRAP! You won't believe what I've just found!!!Yamaha genuine new yzf100r thunderace 1997 right fork assy pn 4sv-23103-00 | eBay Yamaha genuine new yzf100r thunderace 1997 left fork assy pn 4sv-23102-00 | eBay If I had the cash, I'd snap them up, they're at about half the list price on Fowlers (not that Fowlers can get them!!!)! Link to comment Share on other sites More sharing options...
jcr Posted June 14, 2023 Author Share Posted June 14, 2023 sorry i meant 297mm and yes according to my Haynes manual the 97 year onwards Ace has 287mm length and use 30cc more oil. ive had my springs out last year when changing the oil and measured them, one was at the service limit of 294mm the other a couple of mm longer so i know the sizing is correct. im doubtful about buying YSS springs when they are 15mm shorter. couldnt find any specs for Hagon springs so have contacted the company. the new forks you posted would be nice but way beyond my budget! Link to comment Share on other sites More sharing options...
Moderator Snakebite68 Posted June 14, 2023 Moderator Share Posted June 14, 2023 How strange, all years have the same part number... Yeah, I've never seen brand new forks before! SO wish I had a spare grand! lol Link to comment Share on other sites More sharing options...
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