b40rt

have a look here for slightly more obscure plugs http://www.gsparkplug.com/shop/

I had a similar problem on my B40, using 1 plug a trial, and also thought it was because it burnt a little oil. But in reality I think it was more that it was running a bit rich. The oil smoke (I still have) is probably less that running a 2 stroke at 25:1, and plugs seemed to handle that ok.

These are Bultaco "Yokes"

I went from a 350 Bultaco with Betor's to the SWM with Marzocchi's, thought at the time the SWM steered etc better, but to many other factors to really compare. It certainly was the fashion at the time to swap the forks for Betor's, does your friend have the Marzocchi yokes as MartinM suggested for the best set up ? Ross

Thanks for the reply's. Will stick with the Marzocchi's, only thought about changing as Betor is much easier to spell ! Ross

Was watching the clip TooFastTim posted on the Ventoux Trial Classic 2011,(very good it was to) all the SWM's appeared to have Betor forks, are they so much better ?

Hereabouts its only 7.17, but I always have been accused of living in the past !

That's because your a time traveler, where everything is more expensive in the future ! You need to adjust you clock, or TC does.

Have you tried Carol Nash ? They will insure you during a trial on the main land, worth a call.

Fantastic, and so many SWM's.

Reginald Have a look at 4.50 to see one in action http://www.youtube.com/watch?v=fz8BvkZLBZ4

I wondered what Nathan looked like !

I always think that as you weld it back up (gas)at least half the packing gets burnt and your back where you started !

They ride you.

Back wheel spinning at30 mph, exhaust red hot, has the potential to hurt.

30mm sounds ok if standard spacers, 220ml should stop them topping out. http://www.ebay.co.uk/itm/Fork-Springs-Trials-Motocross-Bultaco-Montesa-Pre-65-/220870238985?pt=UK_Motorcycle_Parts&hash=item336ce46309#ht_500wt_969

Any specific questions ? Someone on here can probably help.

Again, sadly, real bikes are being displaced by those with cheat potential !

As before

Fitted Boyer many years ago,(to a B40) no battery needed, everything came with the kit. Easy to fit, time etc. Electrex also do a kit thats supposed to be good, as is PVL.

Most one's I've seen are connected to the wire between the generator and the coil.

Good positive suggestion.

Think they are the same Marzocchi forks as the SWM, if so :- 2 seals per leg approx 50mm spacer above springs. I use 220ml tqf per leg. (But Woody recommends 200 & he's usually right) If when putting the fork caps on you dont have to compress the spring by approx 30mm the springs may be past their best, I got a pair of 35mm springs from Bultaco for approx £27 delivered.