faussy

Personally id use any oil other than rock oil

Fair enough. If you like blasting up hills at Cowm then a 300 would probably suit you best. Im biased towards GG, but id say use your judgement on condition, theres not much to choose between them all.

They look mostly 300s... 300s can be too much for clubmen in a tight trial setting, but if you're just going to use it to beat about then it will probably be ok. Id stay away from the 2013 sherco, most didnt run the best back in the day with the pump carb.

I see a hose connected to the bottom and one at the top. Surely the water exits the head and returns to the top of the radiator

Don't know how a vertigos cooling system works (though i have seen the nitro returns to a more conventional setup), but flow with a pump is far greater than any flow due to a temperature gradient, so no need to accomodate the latter. Do they take the feed from the bottom of the rad and return to the top, or return to the bottom like a GG?

His website no longer works, best to contact him on FB, richard allen. I think i read somewhere of someone putting rev3 yokes into a techno, but don't quote me. Obviously yokes from an upside down fork rev3 won't fit. I think most yokes will be compatible with the headstock so long as the fork diameter is the same. Im not that clued up on beta im afraid lol. I think you have 38mm paiolis Check out this link here https://www.ebay.co.uk/itm/324745616299?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D20200818142055%26meid%3Da463f2777b9c4b2cb1a4713ad21d21b3%26pid%3D101113%26rk%3D2%26rkt%3D12%26sd%3D255293703731%26itm%3D324745616299%26pmt%3D0%26noa%3D1%26pg%3D2563228%26algv%3DDefaultOrganicWeb%26brand%3DSherco&_trksid=p2563228.c101113.m2108

Jetting and needle are standard for the dellorto, but as you say the needle is usually in the middle position

Advancing the timing would give you the characteristics you are after. Ive done it before on shercos and sy scorpas. No idea what the ignition is like on a vertigo however

Still a true trials bike. AFAIK the only difference is the seat, tank, cheaper forks and rear shock, and dellorto carb. The main parts, frame and engine will be the same as the proper trials bike

Be careful about sizing, gaerne call an 8 a 42, and a 9 a 43, while alpinestars call an 8 a 43, and a 9 a 44.5

I wore a 45 in my gaernes, now a 44.5 in my tech Ts with a slightly snugger fit, so id say they are pretty much identical size wise

Your off the shelf, money is no object, option is REH. https://www.rehforks.com/trials-forks Have ridden a bike with them in it and personally didnt think them anything super special, but better than originals i guess

Id guess its seen a harder than usual life. New rings yes, but new piston within 4 years indicates either a seizure or more hours than average especially since covid means its really only a 2-3 year old bike. Some people say around 500 hours for a piston on a trials bike but this is totally dependent on what kind of 500 hours On the other hand it could also be just be an owner who stays very on top of servicing

A 9 year old tyre will be as hard as the rocks. A new tyre run at 4 or below in the mud will make a lot of difference. The fact that you've had a 300 before (granted it wasn't he freshest) and didnt find it too powerful in the dry makes me think you may be disappointed with a 200. I always urge less experienced riders away from 300s because they get away from them, but i wouldn't just because you are struggling to find grip in the winter. I vote 250. 7 in the front is also high. especially on worn tyres. Maybe you're trying your best to avoid punctures, but in mud going, max 5.5 in front, max 3.5-4 in the rear.

If you're going to use epoxy, use epoxy metal, eg jb weld. Anything like araldite will break down over time exposed to petrol

At least you can swap components over from the runner, to diagnose what's up with the non runner

Easy to be 'professional' when you're the richest team, by far

I guess you won't know until you have them started. Good chance the clutch pack is stuck if they've sat long. You could test this without the engine going. Main bearings might be a bit rumbly, but again you won't know until you've started them . The 03 and 04 have non repackable exhausts. Absolute nightmare. Your bike will no doubt sound crap because the exhaust has never been repacked. Some people cut them open to repack, but its a lot more than a hours work. Make sure theres gearbox oil, radiators topped up and fan is coming on before you start going too far Otherwise, just the usual stuff, headstock bearings could probably do with a greasing and maybe rear linkage bearings. Good chance the latter have a lot of play by now, but that won't stop you getting out and riding them. PS, check the sherco rear disc for cracks. If they even still have the genuine discs, the disc arms were very thin and prone to cracking

If you're being spat off a 20 year old rev 3 you're going to spat off pretty much anything

I had a couple of scorpa sys with no linkages in it. Great suspension and absolutely no need of servicing. I love my GG but the rear linkages are an absolute disaster.

Any jitsie dealer should be able to source one. https://www.jitsie.com/en/content/24-dealers#us Vertigo also use the same sprocket. Did you check these guys? https://www.trialstoreusa.com/front-sprocket-gasgas-vertigo/

The 300s i feel are softer at very low throttle openings, they have better torque which makes them nice to ride. Anything beyond 1/4 throttle and they have more go than any 250, most of the times too much for a clubman. If you like your beta 250, then id stay with a 250. Most 250s across all the manufacturers have similar power delivery

Its personal preference to be honest. Personally id always favour a newer fresher bike

The first time you yank the bars up hard, like before a splatter, your hand will fly off the bars

Thats a more difficult question lol. If you're an expert rider, have the spare money, and like an extra bit of bling, yes. Otherwise no. After all its only really the carbon airbox, better rear shock and a couple other small engine pieces. Ive never had one, never felt the need, but im always cash strapped