b40rt

A broken engine mount will cause a lot of vibration ......

Put some 2stroke down the plug hole and see what happens.

Messaged you. Unless its a recent import, there's a very good chance it's already registered. Search on here as the subject has been covered.

New brake drum liners can be fitted without stripping the wheels, about £100 plus postage for the pair.

*80's trials bike would be a good compromise, decent fuel tank, actual seat, good selection of gears.

I'd be very surprised if it wasn't, but stand to be corrected.

I was pleasantly surprised riding a 348 recently, turn well and have a decent section of gears if you can find them .... Because they aren't popular j u st now, doesn't reflect on their performance.

Revved a bit, or screamed its nuts off ? Take the plug out and try again.

Change the parts and be done with it.

Standard chain, no problems for me "back in the day" @nzralphy Used renolds or regina with no problems, tell us more ??

With flywheel on, check if points are opening. You cannot set points with flywheel off. Bultaco points/timing is notorious for wandering. Other things to consider. Check and kill button / lanyard by disconnecting. Fit new plug. Check or replace plug cap. Check wiring to coil.

Moving the wheel back, without doing anything else, will make the suspension slightly softer. In my experience, longer wheelbase improves grip. (Look at hill climb bikes)

Better grip.

Shouldn't matter what the woodruff key is made of, its only purpose is to locate the flywheel correctly. If the key is constantly sheering there is another issue. Timing as has been said, faulty ignition, or the taper/ flywheel is damaged.

Auf wiedersechen pet ?

Maybe the secret is you have to pay for advertising ?

If its ready to trial sounds a good price. If it needs shocks, tyres, cables, bars, levers, ignition, forks etc - its expensive.

You must be older than you look Simon ? Hasn't been a Clubmans holiday for getting on for 40 years !

Never say die, one well known classic rider swapped engines during the pre65 and finished on time.

The slack at the lever allows the piston in the master cylinder to pass the ports, this gets fluid into the system. When next you pull the clutch the clutch plates open further reducing the drag. This may not be the problem but worth checking.

Make sure there is some slack at the leavers otherwise it will never work properly.

If its running advanced, it will build heat quickly, causing crap it the exhaust to burn, hence smoke. As you said, swap cdi before going any deeper.

Plenty of like minder people in your part of the world. Pop in and speak to James Morton in Mauchline, long established trials dealer / rider.

Also Scumtree, with offer of reward.

After a wet trial / washing, position the valve at lowest point, inflate to 30 psi. Most of the water will be forced out.