woody

Yes, Fraser frame

The Hi Boy frame sold by Miller was for the TL125 The Hi Boy 305 was a works bike and Miller's own development bike, not available to the public. The TL250 wasn't on sale in the UK through Honda so there was no market for a Hi Boy frame for the 250 Whether a 250 engine will fit the 125 frame I don't know, you'd have to offer it up and see. The 305 works bike was a long stroke which retained the 250 bore, it wasn't a big bore 250. Fraser did a frame for the TL250 which used a big bore for a 305 engine

The Miller frames were for the TL125 but Whitlock did make a batch of Whitehawk frames for the TLR200/250 and the RS range a few years ago. There's not really anything wrong with the standard TLR frame, they're light, don't break and all they need if you want a more modern feel is lowered footpegs and tighter steering. Whitehawk is no lighter than a TLR frame.

Yo don't say what you have on the rear. Original gearing on MK1 was 12 / 46 which became 11 / 42 from MK2 onwards. They're virtually the same ratio, 3.82 and 3.83 I've run 10 / 42 before which gives 4.20 ratio which gave a still useable low first. Using the 10 front puts it lower than you really need I think and the 10 also gives problems with the chain catching on the sprocket nut. There is a nut with a shoulder which faces against the sprocket to space the edge of the nut away from the sprocket to clear the chain and you need this for a 10 The dished sprocket from Spain that is reproduced now is 44 tooth and I find 11 / 44 low enough in bottom, ratio being 4.00

Beamish Owners club do a replacement system if ever you need one http://www.beamishownersclub.com/for-sale/

Yes, but are you going to re-chrome an entire frame for a weld repair about 10mm long that you can barely see. I used it when I welded on new footrests brackets and it's not really noticeable unless you're right on it The weld has to be covered with something so I can't think of anything that will blend in better than the chrome paint. And in the end they're just trials bikes that get knocked to hell when ridden regularly

Halfords chrome paint should also make a small repair almost invisible

The cable with the threaded rod at the end is the longer cable, therefore suits the longer swingarm. The cable with the adjuster in the 'middle' is the shorter cable and therefore is for the MK1 swingarm.

250 and 310 MAR

Yes, the bolts go through all three

The kickstart will clear the pegs with the TYOffroad kit

Rockshocks are twice the price of steel body Falcons. Alloy Falcons probably about the same price

No idea what the thread size is but if your flywheel is brass coloured it uses the same puller as the MAR or any other Ossa motoplat flywheel - as above, available from In Motion. They're R/H thread

Rear 42 teeth, front 11 teeth. Tyres are normal trials tyres, 4.00 x18" rear, 2.75 x 21" front Chain tensioner is fixed to the brake pedal pivot spindle, not fixed to the swingarm / chain guard. If yours does someone has modified it This is what the tensioner should look like http://www.ebay.co.uk/itm/OSSA-MICK-ANDREWS-CHAIN-TENSIONER-OSSA-MAR-OSSA-EXPLORER-NEW-CHAIN-TENSIONER-/381111480886?hash=item58bc03b236:g:IoMAAOSwyZ5UqCc8

Fine spline is for early bikes up to about '72, maybe '73 and applies to UK bikes too, same with gear shaft. As for new knuckle, I know someone who bought one of the new knuckles from Ossaworld and it snapped straightaway. I'd look for an original used kickstart personally, there's one on ebay UK now which looks to be coarse spline. You need to look at the spline on your shaft and determine whether it's fine or coarse. http://www.ebay.co.uk/itm/OSSA-mar-trials-bike-kickstarter-lever-70s-80s-/162677469118?hash=item25e0552fbe:g:KxgAAOSwn45Zvt1e

Buy some Barnett friction plates which allow less tension on the springs due to their higher friction material. If that isn't enough lengthen the clutch arm on the casing which will give a lighter pull. You hardly need to use the clutch on a MAR anyway. Not sure about rules for hydraulics, probably varies from club to club but I'm not convinced it would make much difference on a standard set up

Try Keith Lynas in the US at Ossa Planet, he preps Phantoms and has NOS parts. Only other I can think of is Hogan's Cycle Shop, also in the US.

The frame and swingarm are standard 198b, there is no swingarm mod so not sure what you've seen No idea on availability of GasGas 280 pistons but I believe the 270 is easier to find. I have an M49 with 26mm OKO and electronic ignition (set on full advance to overcome the curve that isn't really needed and makes them too lazy on advised setting) and to be honest I don't see that it needs anything else. These had the Matador barrel/porting, they aren't lacking in power and rev like hell. They're just a bit woolly at the bottom due to the porting but going bigger on the piston won't change that - my 49 is on 73.50 using a Wossner TSS piston - they go to 74mm so you don't need the GasGas piston. The inlet skirt just needs trimming to match the trials piston. If you use the GasGas piston you may also have to cut the inlet skirt to match the Bultaco piston

Riders need to check which tyres they have fitted for road trials if they want to avoid that kind of charge

Regs and entry form for the Greensmith Memorial trial should be appearing on the front page shortly. This is no longer a round of the ACU Classic but retains the same format as previous years which is one lap of around 35 miles around the Clee Hill in Shropshire. The trial caters for the usual British bikes and twinshocks, there's a class for rigids and British / twinshock sidecars, but this year the trial is also open to over 50s and over 60s on modern bikes. Two routes will be set as usual and I guess if you're over 60 and want the hard route, just enter as over 50... Let's not let this one slide away into the mists of time, these trials need to be kept alive so get your entries in. Entry limit is 100. The Northern British bike round at Llangollen had 100+ entries last weekend for a road trial and that was British Bikes only, so riders are out there.

You'll need a different inlet hose though as the Oko has a smaller inlet stub than the Bing. In Motion have them

yes, fits ok

Tim has confirmed tonight that the Greensmith is definitely going ahead on15th October starting from the Farlow & Oreton Village hall in the Clee Hill area of Shropshire and as in previous years be suitable for all British & Twinshock classes including sidecars. So there you have it from the organiser - definitely on, just not part of the Classic championship

And now the next round bites the dust as well. Mid Wales have cancelled theirs which was scheduled for this weekend. Around 14 entries was the last I heard How many clubs are going to want to put a round on next year with this level of interest? Doesn't bode well. Two rounds left this year with the Greensmith opting out of the series. Be interesting to see how many entries they attract.

The allen bolt bottom centre is also the drain plug