woody

Yes, that big clubfoot rear silencer is a spark arrestor. It is packed with wadding for the first few inches then there are about 7 baffle plates in the rest of it.

Came accross this video of Narita whilst looking at his SY200 video. Just playing for the camera on a Techno with some amazing riding. What's nice about it is that there is very little stopping and hopping, it's all action and the way he hits some of the rock sequences no stop as opposed to breaking them down individually is pretty spectacular. The flow of rider and bike is brilliant. Don't know if it's been posted before, never seen it if it has, but entertaining stuff. Narita - youtube

I think Japanese home market TY250 Yams didn't have engine numbers stamped on the cases, so if it has been brought in from Japan at some stage that may be the reason for no engine numbers.

Yes, I'd agree that the frame looks like a model 80, 1970-72. Crankshaft oil seal carriers on the early models only had a paper gasket, on later models the seal carriers were shaped differently to take a large O ring instead of the paper gasket. All models use the smaller O ring inbetween the crankshaft sleeve and the main bearing on the clutch side.

At least you cut a thread - I tried that once and stopped the lathe dead and something somewhere made a very bad sounding clunk. I also gave up, thoroughly deflated, well beaten and accepting that I have no 'nouse' for teaching myself engineering. My grandad must have been spinning in his grave to see his treasured equipment suffering at the hands of a butcher.

You must have a reason and this probably sounds like a daft question, but what's wrong with replacing the piston with the standard Scorpa/TYZ piston?

Probably Shirty himself and Sam Brownlee who posts on here occassionally

Yes that's the one. I have seen a few twinshock TLRs, both 200 and 250 fitted with the same Golner one piece tank/seat unit so as you say, that may be what you're thinking of. I think the mono conversion I saw at the show still had the standard tank and seat unit fitted.

Gollner Hondas were TLR250 converted to mono, unless there was something else he did that I've forgotten about. If we're talking about the Gollner mono, they are rare and usually expensive, but what would you ride it in. It's no longer a twinshock so twinshock class is out and as an air-cooled mono it's way down the scale in terms of competitiveness. However, If you aren't bothered about being competitive or what class you ride in and want a Gollner because you just want one to enjoy riding it that's a different matter and good enough reason to have one. Be a struggle finding one though. I'd start with wanted ads all over the net etc. There was one for sale a Stafford show last year that didn't sell.

Here TY Offroad

Welsh Retro is AMCA, nothing to do with ACU Westmoreland event also had no trail riders, that's nothing to do with the other events. Entries are down generally for Miller rounds, especially Pre65 classes, the very bikes it was created for and I don't know why. The trials aren't too hard for Pre65, there are 2 routes to choose from so standard trim bikes can run on the easier route. Twinshocks are on the increase but they are generally riders who don't contest the ACU Traditional as that is a step up. Maybe riders now think that the Miller sections are for twinshocks but that is definitely not the case, they're perfectly suitable for Pre65 of all types with the 2 route format. Maybe there's a transition coming here, Miller series evolving into what the old Sebac/Falcon used to be - 2 routes for Pre65 and twinshocks. Traditional series becoming populated with mainly modern 'Over whatever' classes with just the few die-hards on Pre65 and twinshocks taking in most of the rounds. Whatever, one of the fundamental requirements these days has to be two routes. The range of machinery and ability of riders is too far ranging now to run on one route unless the terrain allows it over natural sections - Scottish, Bootle, Lancs County etc. If people are going to travel distances these days with the costs involved (nearly

I've been told the Nostalgia trial has closed already due to a full house. Nervously waiting to see if I've got in or not. Cumberland County sounds just the job based around the caravan park. Looking forward to another rocky trial. Last punctures I've had have been on grass fields.... Sunday I punctured right by the sign-on at the end of 1st lap. The Yam rim won't take tubeless tyres, they fall off the rim, so I'm restricted to tubed on that and out of the two tubed type available IRC are far better than Michelin tubed which wear out quicker and spin like a slick in mud. So I'm stuck with IRC on the Yam until I can get another wheel or rim sorted. Has the Cumberland got road work in it or all off-road?

That's the one, I've been trying to think which club organised it and what time f year it was. Never done it but intend to this year - with a few spare rear wheels too.....

I've just fitted some Barnett plates to my Ossa and although I haven't given it a good panning yet, there is a noticeable difference in some areas straight away. Putting it into gear for the first time I thought the selector shaft had disengaged from the drum. I kept pushing the lever down but there was no click as it engaged. This was actually because the clutch had disengaged so well I couldn't fell it go into gear - there was no click or feel to it going in. When riding and pulling in the clutch the disengagement was absolutely instant. Normally I'm lucky if it's disengaged by the next trial... That's about all I've tried, I haven't caned it yet so I don't know what it will be like firing the bike off the clutch with revs in 2nd or 3rd gear, or how smooth the take up will be with constant slipping in tight stuff. Impressive so far though. Enough for me to want to try some in the Bult (got but not fitted yet) and Yam (on order - hopefully) neither of which have the best clutch action.

Not all tube type rims will seat a tubeless tyre successfully. Can't get them to stay seated on a TY250 t/s or mono rim. As soon as the pressure is down to about 5 - 6psi a section drops off the rim. Happened every time I've tried it. They'll stay on an Ossa/Bultaco rim ok. The Michelin tube type tyres that are available here at the moment provide about as much grip as oil on glass. At least those that a mate and I had did. Apparantly both Michelin and IRC are going to one tyre only that is supposed to work on both tubed and tubeless rims. Can't see how that will work when they both have different bead profile for the different rims. Getting tyres to fit tube type rims may start to become a problem if you have the type that a tubeless tyre won't seat properly on. I tried the 'cut off the edge of the bead' trick on a tubeless tyre once to make it fit a tubed rim. Never again....

Anyone out there converted a pre65 or twinshock to tubeless rear rim and if so where did you get the rim from and what price are they? I've never been bothered about doing this before as I don't feel there's any performance advantage from one or the other, however, I am sick to the hind teeth of puncturing what are fast becoming next to useless IRC tubed rear tyres. The sidewalls are now ridiculously soft and give even with 5psi. Any lower and I can't ride the bike across a camber as it rolls down it and at 5psi grip is being lost to a degree. The carcass is very thin also and the punctures now seem never ending. The tubed Michelin that's available is like having a slick fitted and Dunlop no longer do one, so the only option now is to go tubeless. Tubeless tyres won't work on all tubed rims so fitting tubeless to tubed rims is not always an option, therefore next time I have a wheel rebuilt I want a tubeless rim on it. Last time I enquired around the dealers few sold them and those that did were quoting stupid prices, a complete rear wheel from Haven at the time was only a few quid more.... Central wheel don't sell tubeless so I'm stumped as to where people are getting them from. Any ideas anyone? edit - I'm asking about new rims, I know second hand tubeless rear wheels come up on ebay now and again but I'd prefer a new rim.

It's possible to have a Godden style sumpguard on the Yam frame if someone has fitted one, so that won't help identify the frame. If it's a Yam frame it will have a toolbox built into the frame at the top of the front downtubes. Godden frame doesn't have one. Also, the frame is cut and reshaped under the tank on the Yam frame to clear the spark plug cap. Godden frame is a different design so doesn't have this. Frame number is on the headstock. Yam frame will begin 493xxxxxxx, Godden will begin 81 or 82 for example, which is the year, next two numbers are the month (I think) and the next three the actual production number. You should be able to tell which it is from that. However, doesn't matter which frame it is, the Yam framed bike is just as good.

For a manual try TY Offroad, he may have one for the early bike. Later bikes had different clutches and bigger carb but they are pretty much all the same apart from that I think TY Offroad

What clutch kit is it? Couple of my mates have TLR250 and are looking to sort out the next to useless Honda clutch. We're looking at Barnett at the moment but they don't do one specifically for the TLR250 but the plates from other models fit. Someone posted the Barnett part number on here a while ago and the plates fitted 200 ATC, XR200 and CG125 amongst others from memory Is the one you're looking at Barnett or some other?

Didn't see anything on the website but I may have missed it - it's well hidden if it's there, I'll see Martyn Willmore on Sunday, he's done it a few times so I'll see who's going.

Have you seen any regs for this trial anywhere? I've been on the website and it doesn't even mention the event. Have you done it before and if so is there accomodation (as in B and on the site or nearby? Never done it but there's just a chance I might b able to this year if entries haven't closed Edit - I mean bed and breakfast not B and a bloody smiley face - conjures up all sorts of connotations...

And he would probably have won it on that TY330 he used to ride too......

It's a dating certificate you need confirming the year of manufacture and it has to be from a source that the DVLA accept as providing accurate information to get an age related plate. Dave Renham at Bultaco UK can date it for you but I don't know if DVLA will accept it for an age related plate. If not the Vintage Motorcycle club based in Burton on Trent Staffs. will date it for you and they are on the DVLA approved list VMCC

Hoping to be there, it's a good venue and if it's a championship round it should be a good challenge