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Singles / Re: B31 new owner - trouble starting
« on: 19 October, 2020, 00:53:13 »
sorry re read your post. but did you check continuity with a meter on the pick up? whats the condition of the pick up holder and carbon brush.

Singles / Re: B31 new owner - trouble starting
« on: 19 October, 2020, 00:46:01 »
if its a magneto the first place i would look after checking points is the pick up holder for corrosion. also wipe clean the slip ring with the points plate removed.

Which BSA do you ride? / Re: my other A65T
« on: 10 October, 2020, 22:40:19 »
lovely bike dave .
did it come with that front brake ?
i bet the gremica stops well. ally rims as well.

Twins / Re: a65 max bore
« on: 04 October, 2020, 13:16:12 »
i might snap the +80s up. most usa parts half our price chaz.

Singles / Re: B31 leaking head bolts
« on: 04 October, 2020, 13:12:02 »
baza, tell me more about the ring manufacturer. all us b31 owners may need to go there sometime in the future.

Twins / a65 max bore
« on: 02 October, 2020, 21:12:19 »
my barrels are on +60 now but usa sites have +80 pistons. would they bore out to 2mm oversize without issue?

The Star and Garter / Re: Courtesy bikes
« on: 02 October, 2020, 21:04:52 »
well if the greens get their way and ban meat eating i think methane bikes are the way to go. i produce plenty of methane eating parsleys and couliflowers  and the seating position above the methane tank looks ideal. riding home from the pub could also be interesting.

Singles / Re: b31 crankshaft re assembly help wanted
« on: 28 September, 2020, 23:57:18 »
I found it in a previous post 66 0661. it is a shim but not on the crankcase drawing

Singles / b31 crankshaft re assembly help wanted
« on: 28 September, 2020, 21:29:35 »
hello b31 experts. i have a shim fitted under the smaller crank ball bearing. its worn but i cant see it on the drawings. can it be a shim? and does anything like a seal fit in the crank recess?

Singles / Re: b31 crankshaft bearings
« on: 24 September, 2020, 22:04:43 »
hello. darren is the MAN . he sorted out the bearings for me.
for the record they are
6203 2RSR C3
MRJA7/8 C3
NF305W C3
and beware of fakes on the internet.

Singles / Re: B31 Alternator pictures please?
« on: 22 September, 2020, 23:38:05 »
hello, do you mean the distributor cap? they are very distinct from other types on the b31.

Twins / Re: A10 S/A forks
« on: 15 September, 2020, 23:13:11 »
before you strip the front end place a large screwdriver between the brake plate and fork and wiggle around. the wheel should be rigid against the fork. the spindle should also be rigid and the clamp fork stays in place when tightened. there are lots of spindles that look the same but dont work on a a10. the a65 spindle being one.

Twins / Re: A10 S/A forks
« on: 14 September, 2020, 21:10:48 »
once i had a wheel spindle bottom out at the thread leaving some play on the wheel on the clamp fork side. i had to cut a bit of hollow pipe to lengthen the step in the spindle so it clamped the wheel.

Twins / Re: A10 S/A forks
« on: 14 September, 2020, 20:57:40 »
the flex at the wheel and fork bottom is usually taken up by the mudguard arched bracket acting as a brace. or your wheel and fork clamping is wrong.

Singles / b31 crankshaft bearings
« on: 14 September, 2020, 20:32:41 »
 the original b31 crankshaft bearings are now superseeded by SKF , NGK,  and others. but i m unsure as to whether i need c3 or cn tolerances with any of the three bearings. i ve also seen MRJA bearings the same sizes [ 1 1/8 and 7/8 ] but which suffix is correct? any recommendations?

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