I was skeptical as well at first but thought I would try a set. I had the boyesens in and back out for comparison and had to put them back in again, cleaner quicker throttle response, smoother reving all the way through. Engine response was much smoother with them in than the standard single petal reeds, best $40 I ever spent. You can find the number on the boyesen website at this direct link: http://boyesen.com/vaf/product/list/?category=%3F&make=21&model=205&option=205&year=626 , you can also probably get someone local to match a set and provide.

thanks very much mate im going to try them

Motomerlin in the UK have them in stock at this link:

http://www.motomerlin.org.uk/product/Boyesen_Reeds_for_Montesa_315_trials_boymo

Little update. New piston arrived from Feetup this morning (great service). Fitted it this afternoon (as our electricity was off for maintenance) and the result is that it's much better. There is still a bit of a rattle so I now need to decide if I can live with this or send the barrel for replating which will cost

wouldnt the rattle be the small end rather than anything else

I would do the bearing and pin before replating the barrel.

I would do the bearing and pin before replating the barrel.

I think your both right. Will fit new ones.

I'll b a dab hand at stripping these things by the time I'm done

good il fetch mine to you

good il fetch mine to you

No worries

Trickiest bit is squeezing the rings together while putting the barrel back on. Seems you need three hands!

im doing my top end next month just new rings bearing and pin i have noticed a slight rattle from time to time plus i want to do it

need to fit those reeds before i do the top end so i can notice the difference