Final BM fixes
30/10/2019
Left hand Carb leaking
- Check float chamber - breather
tube bent- could be restricting float movement. Straighten it
- put back - carb fine. Hurray.
Take it for a run, carb leaks. Boo.
- Remove float, weigh it.
Should be 12.5gm weighs 14gm. Swap floats with other carb.
Carb fine. Hurray.
Take it for a run, carb leaks. Boo
- Remove float valve - maybe slight
shoulder on it?? Swap with valve from other side
Carb fine. Hurray.
Take it for a run, carb leaks. Boo
- Remove fuel pipes - blast carb
cleaner into fuel inlet. Find small black bit in float chamber.
That must be it. Put together.
Carb fine. Hurray.
Take it for a run, carb leaks. Boo.
- How did that black bit get through
the filter?? Old hose used between filter and carb. Replace
with new hose.
Carb fine. Hurray.
Take it for a run, carb leaks. Boo.
- Measure volume of petrol on float
chamber following Snowbums instructions. A little high - adjust
by bending float tab
Carb fine. Hurray.
Take it for a run, carb leaks. Boo.
- Take of carb for close inspection.
Find float chamber gasket is broken.
Probably broke in 1. above.
When bike is on centre stand fuel level is below gasket. So
always OK when reassembled.
When bike is pointing down hill, as
in driving into garage petrol is above gasket. and leaks onto
my boot. (Carbs are slightly downdraft). This means that the
petrol cannot get
Carb fine. Hurray.
Take it for a run, carb fine. Hurray
BUT:-
- Right hand carb now leaking.
Boo.
Suspect broken gasket due to multiple
removals of float chamber.
ORDER MWB
new gasket but off on holiday for three weeks - something to
look forward to on return
- Fitted new gasket to right had
carb - old one looked OK.
Carb fine. Hurray
Left hand carb leaking again - this
bike has a cruel sense of humour!
Removed float chamber - rattled float
up and down, replaced chamber.
Carb fine. Hmm
Is muck getting through the inline
filter??
Ordered the "strainer for inside tank but can't fit it while
tank is full.
-
 So
I went for a ride of around 100 miles and the carb leaked
intermittently all the time.
When I got back I took the float chamber off and there was
muck in there.
Now I expect muck to come from the tank as it has a dodgy
tap with no "straws" so it is draining through the bottom,
but I would have expected the filter to stop this.
After 100 miles, the tank was empty enough to put in my new
tap (with straws) and strainer and I also replaced the in
line filter.
Out of curiosity I took a saw to the old one to see if my
suspicions were right.
 Yep,
the filter is made of a paper element which is held against
the plastic bottom of the filter by a metal cap in turn held
by the top of the filter. So the bottom "seal" is the
edge of corrugated paper pushed against plastic!
I looked inside the paper (the carb side) and there were a
few black bits there showing that, indeed, the filter was
letting muck through. USELESS
So another ride with a new tap and filter is in order.
Vibration
Vibration felt in the handlebars is probably caused by unbalanced
carbs, not surprising after the above epic. So, check fuel
level on RH carb then balance carbs.
Probably best to sort cable runs out first .
Cable runs sorted - carbs balanced - vibration now
acceptable
Security
Fix seat lock - plan is to just keep ignition key on ring with
watch and keep other keys in one of the tool boxes. - Done
Fit anti theft alarm from Bullet
Fixes
Fit new fuel tap - current one doesn't work on reserve.
Done
Check heat sink compound on ignition unit.
Done - I was surprised to find that the heat sink and the
ignition unit did not fit well together as neither was
completely flat. I used a file on both to reduce the air gap
then used copper ease as a heat sink compound. Should be OK!
Comfort
Devise phone mount (bullet one won't fit) Exhaust clamp,
steel bar, existing phone mount
Won't work - bar is always at same angle to handlebar - needs to
be twisted.
THIS ONE from Amazon looks ok.
Done - it works well.
Fit heated handlebar grips from Bullet
Done - needed to file ridges of BMW twist grip.
Lighting
Improve headlight - get brighter bulb
Done
Fit driving lights from Bullet
Done
Fit LED bulbs where possible Indicators, parking light, instruments,
maybe tail light.
Generator bulb - powers the field coils of the alternator - maybe
needs resistor in parallel.
WHY? The bike has a 240W generator a 60W headlight,
a 50W handlebar heaters and maybe 12W in the ignition and even with
the indicators on and the stoplight there is still enough power.
Maybe change the easy ones purely for longevity. Or maybe
just buy spare set of bulbs.- could fit extra stop lights to panniers.
Future - winter project?
Respray - Colour?? - look at web colours. - silver looks better
- maybe darker metallic grey?
Maybes
Valve seats
Wiring Harness - design and make new one - probably less complex
than the Enfield. Fiddly bit is interfacing with switches - finding
connectors. Looks a big job - mainly due to sourcing connectors
Schedule
Fix Leaking Carb
Fix seat lock
Sort throttle and choke cable runs
Check Igntion amp heatsink compound
Balance Carbs
Fit daylight running lights -connect to horn and chassis
Fit new headlight bulb
Fix instrument panel tabs
Fit new phone mount
Fit heated handlebar grips - connect direct to battery
- should be OK - has a fuse and low voltage cut off.
Test Ride - 100 miles - Cadgewith and back?
Change fuel tap
Fix headlamp shroud - broken tab.
Fit alarm - this will be permanent postion so cables can be
cut. (Behind a side panel??
Winter projects
Paint job Tank, Nose cone,side panels - get back wheel sorted??
Make LED Rear light.
Maybe Fit stoplights onto pannier carriers -
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