Brand new to trials. I have a 04 Scorpa 125 which has a stop button. Just wondering if there is much difference between the Apico & more expensive Leonelli ones used on modern Scorpas before I buy one?
WARNING!
Be aware they have different polarities and are not interchangable. You can not mix them without big problems.
In fact I think Classic Twinshock fits tall riders better then modern.
Find correct handlebars to suit you.
Risers can be dangerous.
You may also change footpeg position for better stands and also fit modern footpegs. Original Bultaco are outdated. Cut the original attachments and weld on new. We all do.
I agree with Lemur. But why not test thin gearbox oil as ELF HTX740 all-around (in clutch and gearbox).HX740 recommended by Honda/Montesa in their cota 4-strokes. It is quite expensive, so try to get a good deal. On the happy side is not much is needed.
You need a flywheel puller to extract the flywheel
You may need an impact gun, for the central bolt, at the extractor.
Be careful not to destroy the threads, I think the risk is low, when disassembly. You may need something between the crankshaft threads and central bult
Never happy with the Crapioli forks but they can be improved. Ohlins is a much better rear shock then Sachs Think I got mine from Splatshop Be aware that there is no standard for fork oils i e one brand 10w might be thinner then 5W of another brand or vice versa
I don´t know about Fantic settings but normal is to close fuel screw lightly and then open until best idle. I then open fuel screw about 1/8-1/4 of a turn extra for trials use. You must test which setting is the best for you and count the turns. Needle notches usually are counted from top of needle. I would say that 3rd notch is no 3 from top. All settings should be documented. A good place is a laptop. Hope this is of any help
Have used tubeliss last years at my Bultaco, together with X11 and 803GP. Little more complicated to mount but saves a lot of trouble. Think it is a good product. No inner tube is needed.
It is normal that the leg without damping to be quicker then the leg with damping. How much? It´s impossible to say. Depending on your settings, oil and forks. Trials bikes suspension is not sophisticated compared to moto-x bikes.
Rupert Ratio "Unit Single Manual" states for 1962 bikes.... N5. I would try a projected N11YC or even N12YC and see how it goes. Projected spark plugs must not bang into something (piston or valves) N5 is non projected as normal of that day. Think N5 would equal N9 projected, or just about. A plonking trials bike may need a little hotter plug. Do not replace original Electrex cap. It might sit there for a reason (suppression)
Remember that modern petrol doesn´t foul plug as much as before. Long time running may be necessary before reading plugs. If black colour after short time it might be oil contamination and it hasn´t much to do with spark plug grade, but oil taking part in the combustion process and it should generally be avoided.
Normal, is vertical rear wheel travel. The static sag can be 10-20mm, and loaded sag (with rider fully equipped in riding position) can be somewhere in region 40-50% of full rear wheel travel. Measure to a convenient point at rear mudguard and center of rear spindle
I would say, best is to get a new tube and replace. Use soap (or similar slippery) when fitting/removal the tyre. Use proper tyre tools. Not screwdrivers. Be careful not to puncture the tube. Lot of YouTube videos covering this.
The trick is to buy new before the old is completely worn out. Keeping the old as spares. Or sell to a friend. Wulf trials boots is what I have been using the last 10 years or so. Now using HL. Best so far. Around 200eur.
Don´t buy motocross ones. They are too hard and slippery.
Sherpa T 350 Oil Quantities Gearbox Primary
in Bultaco
Posted
The volumes needed are a bit exaggerated concerning the 0,6/0,3 rule. I would say: As long a internals are wet it will lubricate