Our son run his 02 315 on 80/1 fully synth for for 2 years trouble free except for the occasional dribble of old oil out the bottom of the silencer until a couple of months ago when he changed to 100/1 , the bikes now idle in the garage with mains gone and a seized piston while he amasses the
It was advertised last month but never sold, I had a chat with the guy after the auction and before long I was headed over the wall to meet a chap from Bromsgrove.
It only took a couple of months to realise the b40 in the hands of a novice pre 65 rider can be more than just a handful, perhaps the wrong choice for my first venture into the world of the classics so it was promptly sold on to a chap better able to get the best from it and replaced last month with something a little less aggressive and a fair bit lighter .. Cub...
I have an 05 250 pro which has taken a knock at the master cylinder letting out some fluid and in some air,
I see the system takes mineral oil instead of standard clutch fluid what type/brand/make of mineral oil should i use and where would i get some locally ?.
I recently bought a BSA b40 trials bike "SS engine,distributer type it has Boyer electronic ignition fitted and came with a mk1 Amal carb which i think needs setting up proper, as it wont rev out and it backfires and spits the occasional flame,
The plug shows heavy black deposits,
I noticed tonight that the front pipe is going a bit purple colored.
The carb has 622 with a 4 manually stamped over the last 2, making it 624,
I measured the in and out at 24mm and the slide tube at 30mm,
the float says 622 on it,
the main jet is a 120,
the needle jet is 106,
the pilot jet is 25,
the throttle slide is a 3 and has 622 stamped on,
and the needle is on the middle groove..
It was purchased from Sammy millers in the last couple of years.
Is this the jetting and set up for a 622 or 624 ?.
What would be the best set up for this carb on this bike ?.
any input would be gratefully received either posted on here or PM..
Looks can be deceiving it is a b40 frame with some slight mods,headstock geometry changed,frame sides chopped,the front forks are bultaco i think but i can lay my hands on the originals when/if required..
did you used to ride smaller bikes before your ossa ?. perhaps north of the border ?
....
nor has your riding 
100/1 Vs 80/1
in Montesa
Posted
Our son run his 02 315 on 80/1 fully synth for for 2 years trouble free except for the occasional dribble of old oil out the bottom of the silencer until a couple of months ago when he changed to 100/1 , the bikes now idle in the garage with mains gone and a seized piston while he amasses the