An update on dating your Yamaha (currently looking to do this for a TY250 twinshock). You can still call customer services at Yamaha Motor UK, but they will ask you to send an email to cust.service@yamaha-motor.co.uk and include the frame and engine number, make of bike, along with your address and contact details.
They will then contact you to arrange card payment for
I have not seen Gordon for donkeys year now, not sure what he's up to......... I went to my first ever trial with him years back (Stourbridge trail at Hartelbury) .
Decent chap if a little set in his ways .......you riding South shrophire in a couple of weeks?
It's always a good idea to use a little heat on the upper part of the lower leg to break the seal/leg bond. Sometimes the seal will be stuck enough to damage the upper leg bushing Teflon coating when the tubes are snapped apart.
Jon
Almost forgot, to keep from damaging the seal lips when sliding it on the upper tube, cut the corner off a plastic sandwich bag (like a three-cornered hat) and put it on the upper tube, the seal will slide right on.
Nice tip with the heat gun Jon I have a handy roll of old brown parcel tape to keep the new seals from getting damaged
Air cooled monos are an anomaly and are currently under review. They have cost us the use of well loved venue already. I have my own views but as i said under review.
Christ ! OTF.....should it read GOM.....Grumpy Old Man by the sounds of that lot!...note to self, not to ride any 'classic' trials in Derbyshire area
My question is why is classic trials seemingly growing when modern trials isn't, is the old machinery the draw or the sections and rules ? and the name Classic trials, if you rode a modern bike or an old bike wouldn't it still be a Classic trial?
Scorpa kinda went this way with the TYS125, I liked the idea and bought one.......I know its was no twinshocker but what I liked was the simple aircooled four stroke engine.
When I had mine I never saw another one in local trials at all, it should have sold by the boat load......people must like spending nearly 6k on a bike that they cannot ride to it's potential.
I've always said the should have never stopped making the TY mono(again no twinshocker but in the same vain).
As Woody says, impact wrench is the way forward...I use an air one but if you have no comp a cordless one is just as good.
I take it your replacing the oil seal?.....if so leave stantion in yoke clamped up lift dust cover off lower leg, take out large circlip and undo lower leg bolt (with said gun) and pull leg off...it will take a couple of taps to get the seal out before the leg slides off.
A bit of a tip for putting a new seal in, I found a nice lenght of 40mm plastic drainage pipe is just the job as a drift for the new seal
This was the Ledbury Club but held near Hay on Wye and it was for Classic and Modern bikes (with different classes) and a single route. Next fixture in the areas will be a Western Centre trial up in the hills at Craswall, run by the Wye Valley club (good venue) on 12 Dec. The next trial at Clyro will be on 2/Jan AFAIK and will be the AMCA Herefordshire Classic Trials Club; no modern bikes, but air-cooled mono's (like TY's) will be fine. Clyro is good, in terms rocky streams and some hills and turns.
An old mate bought two brand new ones back in the day, modded the one to take two disc brakes (he was a clever chap).....I recall them being very solid bikes but, the engine seemed quite flat compared to my old TY mono I was riding at the time.
I think both of his bikes were the 240cc versions?, lovely alloy frame if I recall though.
I had chance to buy one of his old bikes about three years ago but turned it down, it was going for a song too.......I dare say I'll regret not buying it!!.
Just putting mine on, it's been sat on the shelf for yonks!.....the external brake arm is a fair bit longer the the internal STD one so i'm guessing it'll give a better brake....I'll let you know how it goes on my next trial in a few weeks time
Sounds fun !! what club runs that then Malcra?......from your report there were modern bikes there too and not just an event for T/Shock bikes?.
Me and my mate both run TY monos and neither off us have been down that neck of the woods before, we'd both like to ride some more of the classic type trials but with out the twinshock vs mono crap that seems to come with certian classic events.
Parts are no problem, sure some parts are getting a bit hard to find.....I think genuine 0.25 piston kits are no longer available but you can get hold of pattern stuff.
Some dude on ebay has made the Z pattern spokes that the OEM wheels take, I got some to fit my front wheel...nice quality items.
I guess that 95% of parts you can still get off Yamaha (at 2010 prices I might add!)....loads of bike spares out there, flea bay is pretty good for that..........great bikes with no real vices.
I've had about 6 TY monos over the years, two brand new ones.....great bikes for clubman use.
Very soft power delivery, bullet proof engines, the last pinkys are probably the best ones to go for....factory fitted front disc brake.
There's not a great deal of difference between all the models, you could argue the latter ones seemed to have a better power delivery and as said before the disc brake is a welcome addition.
Mines and old 1985 59N with a later rear shock fitted, 270 big bore kit, Talon tubeless rear wheel, YZ front brake plate etc etc.
Really nice bikes to ride, very soft suspension (too soft if your pushing it too hard)...they do seem to be going the same way as twinshocks have gone regarding prices but there still does seem to be some good machines left out there for under a grand.
I run 2% ( 50/1 ) in my ty250a with good motorcycle oil and it is still a little ritch, but no fouled plugs and it start on 2nd kick cold and 1st when hot.
If you have been running that mixture for a while, you will probably have to clean your pipe.
Nigel Birkett was selling the front plate you want, not sure what year or exact model it is off though. There is also a twin leading set up that fits but is a rare one, off a early YZ I think .
I bought one as a back up in case my std yam one ever cracked (which they do apparantly)....it wasn't cheap but it looks like new......it's got an external brake arm as opposed to the internal one on the std mono one.
Just in the process of doing mine. to get at it properly I cut the front section off where it meets the middle box then I cut the back off the middel box.
Burned out the front section and the now open mid box, ripped out all the old packing before repacking and welding up........I'm using mig on mine, set it really low and it's ok + I've done all my cuts on the back of the mid box so you can't see when it's finished.
I used a 4.5" grinder with a small thin cutting disc to do the butcher work.
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.......you riding South shrophire in a couple of weeks?
I have a handy roll of old brown parcel tape to keep the new seals from getting damaged 
good on ya bazzer!!
Dating Your Yamaha.
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