scotty Posted December 20, 2006 Report Share Posted December 20, 2006 Hi guys, Has anyone fitted fork springs from another bike, say ossa or bultaco? as the fork springs on my ty250 are ******, just pushing the bike forward makes them sack right out! i want to keep it standard'ish and not mess about trying to make other front ends fit etc! any ideas? Quote Link to comment Share on other sites More sharing options...
pitley Posted December 20, 2006 Report Share Posted December 20, 2006 Scotty Dont wast your time with the standard forks! Best way to sort out the front end is to use ty250 r forks n wheel. These forks are light years better, i got them on my Majesty and most folk i know with the same bike use em. Plus they stop the bike tucking in on turns, not like the standard set up. Theres probably a few guys on here who could back me too. Cheers Quote Link to comment Share on other sites More sharing options...
scotty Posted December 20, 2006 Author Report Share Posted December 20, 2006 Pitley what would i need 250 mono forks/ front wheel (drum)/ yokes, will the yokes fit straight in? if fitted with this front end would the bike be allowed to be used in the twinshock class even if its fitted with a later front end? cheers Quote Link to comment Share on other sites More sharing options...
old trials fanatic Posted December 20, 2006 Report Share Posted December 20, 2006 It's a common mod and well worth it Scotty :agree: Shouldnt be a problem with twinshock class as long as you use the drum brake. They only get in a tizz if you fit a disc to a bike not originally fitted with one. Saying that there are quite a few Hondas and Fantics out there that have sprouted discs. I even noticed a TLR with a hydraulically operated drum recently. Not too sure how that got through Just have to ring round the breakers mate. TY250 mono forks and good wheels are getting rare. Even known people buy a complete bike off e bay just for the front end and sell the rest to recoup some of their money. Thing to watch out for is the drum, they crack, and the front rim which look ok on the outside but corrode badly from the inside so have the front tyre off BEFORE you buy. Oh yes the front Z spokes are no longer available so unless you can get a local wheelbuilder to make you some youre stuck. Worth doing though as it is an improvement Quote Link to comment Share on other sites More sharing options...
woody Posted December 21, 2006 Report Share Posted December 21, 2006 If you want to stick with the original set up you need to sort the two problems which are that the standard forks are under-sprung and under-damped. As you've noticed they collapse on drop-offs. To sort the damping you need to revalve the damping rods by braising over the holes in the tubes and re-drilling to half the original diameter as a starting point. It will be trial and error and a lot of stripping and rebuilding to get it to where you want but they can be made to work as well as mono forks with the right settings as I've ridden one of Craig Mawlam's bikes with the mods done back to back with another with mono forks. No noticeable difference, both worked well. It's just a pain getting there. I tried a few times, gave up and put the mono front end in. If the damping mods are done successfully, you'll probably get away with the standard springs as the increased damping effect won't allow the forks to collapse so easily - unless they are knackered of course. Don't know anywhere here that does uprated springs but BJ Racing in the States used to. No other springs will fit as they are such a small diameter. If you go the mono route, Mono yokes wont fit the Majesty headstock, you need to bore out the Majesty yokes to take the mono forks. Majesty yokes have a bit less trail than the mono so this compensates for the fact that you now have a leading axle instead of in line. As per the previous post though, make sure you get a front wheel in good nick. Alternatively, bore out the yokes to take Marzocchi front end such as that fitted to Fantic/Armstrong etc etc. or even Ossa forks which are in line and take the same spindle size which means the Majesty wheel will fit. You may just have to alter the offset a few mm on the spokes for the Ossa forks (I had a TY wheel in an Ossa once so they will fit) You should be able to get a pair of TY twinshock yokes from a breaker to alter so that you can revert to the standard set up if necessary. No problem with the different forks in the Majesty for twinshock events. All the forks mentioned are of the period and although the mono is a later model they were still ridden alongside Majesty in competition in 83/84 so can't see a problem with mono forks. It's just discs and monos converted to twinshocks that are banned (from the ACU Classic series - individual clubs have their ownn rules for their own events) Quote Link to comment Share on other sites More sharing options...
scotty Posted December 21, 2006 Author Report Share Posted December 21, 2006 Cheers Woody , ill try the standard set up if possible with the mods youve mentioned Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.