2stroke4stroke

At least twinshocks generally have the advantage of the air filter intake being a bit higher relative to the water levels we used to ride through.

The legal definition of a motor vehicle was tightened up a few years ago so the authorities could deal with those using them on private land etc as previously they had slipped through the net by claiming that they were not using a motor vehicle due to it not being registered.

I think you've just realised why, once the pad compounds were sorted, discs were so welcome. Consistency and no weekly maintenance.

Every muddy or stream based trial if you want to maintain what passes for good braking. Or every time you hose it.

I find it hard to believe that compressing the forks sufficiently to secure a bike generates enough pressure to cause seal failure. The rear suspension on my mountainbike (essentially the same setup as a front fork in terms of seals etc) runs at 180 psi, before any compression.

Some advice from an even older guy - forget nostalgia and get a modern bike, it's much easier on the body and everything does what it should. And possibly involves less expenditure.

I well remember blue plastics but never a blue frame.

Surely they'll never sell a blue-framed bike to a GasGas fan?

I would have thought that the best 125 for an adult would be the 200 Beta☺

Though that one may be a bit more special, perhaps because almost nobody bought it when it was sold as a Scorpa years ago. With even less chance of sales now? It's no 4RT.

How feasible is it to plate the flywheel without affecting the threads or the taper? I would leave it but do what we did in the day and put a breather in the top of the case.

Electric start too. Exhaust bend seems strange but it looks like they're giving themselves a couple of years to sort the model out?

I'll be interested in how you get on as mine needs a good kick (compared to what I see others doing) from just before compression - no use if after compression, cold or hot. I have not checked voltages but cleaned up every connection with the earth being the obvious first target.

I seem to remember a CG based bike back in the day but can't recall just what it was. I want to say Fraser but that would have had a special frame anyway. There is one locally built fairly recently and housed in an older Gas Gas - very neat. Maybe that's the way to go.

Given that a light serves no useful purpose on a pure trials bike (in the UK), I would remove it. One would like to think that on a sophisticated machine like the Vertigo this could be done simply by unplugging a connector rather than having to cut wires.

There seems to be a few videos on the net showing how to repair certain levels of scoring. One uses superglue.

I happened to be at the Classic Mechanics Show last weekend and, by coincidence, this was on display. No sign of electrical assistance on the front wheel but I don't recall Dave using such for his normal displays. I can't vouch for the date - it was the early Nineties when I saw him attempt it. Footrest position notwithstanding it's one hell of a lump to use in comparison to a Vertigo. I read that he averaged 60 mph on the back wheel. I look forward to the documentary.

Or just whip the front pipe off and measure through the port - accurate enough for your purposes.

"Changing the gas flow out" as you put it usually weakens the mixture. There may be undesirable long term effects - worth checking for this, how does the plug look?

Quite possibly, and I would drain mine if there was an easy way to drain the 4RT - I don't want to remove everything after a trial to be able to upend the tank.

I'd hate to see this develop in to the thin end of a wedge that saw full face helmets becoming compulsory. Protection from injury by use of a helmet is a complex subject that used to get an airing in the days when the motorcycle press carried intelligent articles rather than encouraging people to get the knee down on the public highway. I recall Scandinavian research using a helmet (deliberately open face) with a shell having a low coefficient of friction in order to reduce rotation of the helmet. This would be my concern if using a full face in trials (but the choice is down to the individual) and was the reason why the ACU used to forbid the wearing of full face helmets by children in motocross. My assessment is that the chance of hitting my face is less than that of catching the chin bar on something and wrenching my neck. I might reassess my needs if I was riding World sections. Being a mountain bike rider as well, I have seen these full face helmets worn and the thing that struck me was that not only did the extension of the chin bar lower down increase the likelihood of leverage but it left a gap plenty big enough not to offer protection if landing face first on the typical trials rock. Last time I looked the ACU required a trials helmet to comply with the same standards as for road use.

I had spotted the Dalesman tank but jc2's comment about the chain adjustment makes me think AJS for the frame. I seem to recall they had such a system for tensioning the chain.

During your many hours of practice do you put down section markers or just run as wide as necessary to get round? You need the discipline of going where you have to go, not where you find it easiest.

You might still find some CO2 inflators at Aldi I think it was. Much cheaper than branded MTB stuff.

That's basically it. I'll just have to keep saving and hope to find a Mont wheel? But if my info on the Sherco dimensions is wrong I'd be delighted.