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Author Topic: '82 R65LS Ignition Session  (Read 5948 times)

Offline Tony Smith

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Re: '82 R65LS Ignition Session
« Reply #30 on: February 29, 2016, 07:21:29 PM »
Quote
I don't see how the new adapter bracket and IGN MOD can fit between the mounting boss and voltage regulator  :-/


I'll send you pictures of mine installed when it arrives......
Also

The offset bracket is available from Motobins for GBP3.50 see
https://www.motobins.co.uk/displayfinal.php?q=70821&topsearch=1&go=GO

Also I have one of the later large heatsink ICUs purchased very cheaply from an electrical wholesaler in Poland - I will look a the box tonight and post details.

My $AU100 purchase of the Euromotorelectrics ICU and bracket is my very last attempt at beating reliability from what I regard as a silly system. To be fair the R65 has never stranded me, but I have had a long series of annoying faults which has diverted time from other things I'd rather be doing. A partial list of my "woes" is below.


When I first got my R65 runnign again it was fitted with a "crack-o-matic" and, you guessed it, it was cracked. In fact it stopped working when I gave the bike a bit of a post rebuild bath.

I fitted a double ended coil from a Mercury Outboard, 1.5ohm measured. This worked very well indeed initially but degenerated into coughing, misses and rough running. Eventually diagnosed as plug lead insulation breakdown from arc-thru to the starter motor cover, quite simply the coils were too hot for the job.

Next I purchased a genuine BMW coil, not realizing that it was one of the new 0.5ohm models. This worked well, but fried the 1984 OEM ICU, not completely but its failure mode would not allow the engine to rev much past 2,000 RPM.

I initially fitted a (very cheap) ICU from a Chinese source, it worked OK but the time allowed for the engine to start turning over was way too short and I had to flick the kill switch off and then back on immediately prior to hitting the starter button.

Somewhere in the midst of all this I rebuilt 1 beancan with a HKZ101 which worked just fine, but didn't solve the problem I was chasing. Then I found a Chinese soource who claim to hold a licence to manufacture "genuine" 2AV54s, I bought a couple of samples and rebuilt another beancan with one - no problems so far, but I am currently carryign a spare beancan just in case....

Finally I purchased a Bosch ICU and it has now been fitted fro some months. I currently have NO ignition problems, but as indicated earlier I am a bit over the whole silly idea of hall effect triggers and ICU whilst still retaining mechanical advance/retard, I am also uncertain whether the Bosch part is capable of living long term sinking a 0.5 ohm load - and in any case BMW reckon they won't last, hence the enlarged heatsink.

So, last roll of the dice, the Euromotorelectrics part and the Polish one for backup.

As I've said elsewhere - one more electronics related ignition fault and Boyer Bransden here I come.....(and in fact had I realized they made a unit specifically to replace the hall effect I would have bought one about a year ago).



To the OP, my apologies for hi-jacking your ignition thread for this rant.

1978 R100RS| 1981 R100RS (JPS) | 1984 R65 | 1992 KLE500 | 2002 R1150GSA |

Red_Hen

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Re: '82 R65LS Ignition Session
« Reply #31 on: March 02, 2016, 08:04:44 AM »
Thanks guys - corresponded with John Olive, provider of new ignition - he asked if I timed the trigger unit - although never had to do this with OEM can from BMW, I'd always removed it then replaced it w/out cranking engine so it would be in right position. Maybe orientation is different with this new can - don't know but it should be the same - Haynes book says to set flywheel to S and then insert can and then time - but where I'm stuck right now is getting the bike started - as previously posted, when I installed ignition bike started immediately, ran about a minute or two an then died - spoke to a friend and we both agree if fuel starvation the bike wouldn't die so quickly but since then, bike hasn't started.

Yesterday drained tank, took external fuel filter out of the equation, inspected fuel lines to each carb and confirmed no obstruction in fuel lines. When I drop carb bowls, they're about 3/4 full - when I did fuel flow test, fuel flowed out of both carbs very consistently. Maybe something stuck inside the carb? Will double check that air is getting into system but never was a problem before. Will double check valve clearance but bike started up fine and am pretty sure they're set right - got spark, got fuel - maybe she's out of time. Does orientation matter of the (2) dogs on front of bean can that connects to front of engine - I'll alternate those too.

Will remove air manifolds today and see if more air introduced will cause bike to fire. also getting the spark plug testing tool that goes between plug and wire to confirm bike is sparking when I crank her. Will report back
« Last Edit: March 02, 2016, 09:01:32 AM by Red_Hen »

Offline mrclubike

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Re: '82 R65LS Ignition Session
« Reply #32 on: March 02, 2016, 08:18:00 PM »
Remember they will run on just one cylinder ;)
1982 R65 running tubeless Snowflakes
2004 R1150R

Red_Hen

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Re: '82 R65LS Ignition Session
« Reply #33 on: March 02, 2016, 10:13:13 PM »
Quote
Remember they will run on just one cylinder ;)

Removed air tubes, cranked engine and lots of air pulling through!

I did remove tank again today - pulled the connector apart - could've sworn I'd gone through them all - at any rate it looked really ratty inside so I used brake cleaner, q tips and a piece of a nail file to clean up the connections - two green/blue wires and one green/red - from schematic, looks like this runs to the kill switch - I may be on to something. Will spend some more time tomorrow. Only question in my mind is if this was a bad connection how come I saw spark when cranking engine with plug grounded on cylinder?

Red_Hen

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Re: '82 R65LS Ignition Session
« Reply #34 on: March 04, 2016, 03:07:38 PM »
She's runs!

Probably a combination of things and exactly "what" I can't say and really don't know.
Here's what I did today that caused her to immediately start and so far, not conk out.
R&R Spark Plugs - Installed NGK BPR7ES (equivalent of Bosch W5D) Removed new NGK BPR8ES New plugs were gapped within manual specs.
Set static timing - although probably not necessary with an electronic ignition - positioned flywheel to "S" and R&R new trigger unit - probably did nothing. Will time the bike later today with a timing light.
Checked valves - both exhaust valves were mighty-tighty - that was the last thing I expected! Intakes were in spec but not exhaust - now set to .10mm intake and .20 exhaust.
As previously posted, drained gas tank, cleaned petcock screen but wasn't too bad - it is missing the round gasket - think I'll order one for good measure and install it when tank is low again.
New ignition trigger unit, ICU, Ignition harness.
Made sure all connections have heat shrink around perimeters so as not to short out against coil!
Confirmed air was drawing through back of carb and it was.
Confirmed spark.
One more important detail - the green power wires posted previously - corroded connections could have had everything to do with bike cutting out but symptoms were so like a hall sensor or bad ICU it was really hard to put my finger on what was the exact problem. Bike is in pretty good shape and hopefully will bring me lots of love!

Thanks for all of you who provided input on this project!

Offline mrclubike

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Re: '82 R65LS Ignition Session
« Reply #35 on: March 04, 2016, 08:41:00 PM »
Quote
Quote
Remember they will run on just one cylinder ;)

Removed air tubes, cranked engine and lots of air pulling through!

I did remove tank again today - pulled the connector apart - could've sworn I'd gone through them all - at any rate it looked really ratty inside so I used brake cleaner, q tips and a piece of a nail file to clean up the connections - two green/blue wires and one green/red - from schematic, looks like this runs to the kill switch - I may be on to something. Will spend some more time tomorrow. Only question in my mind is if this was a bad connection how come I saw spark when cranking engine with plug grounded on cylinder?

That looks like your front brake switch connector  to me
1982 R65 running tubeless Snowflakes
2004 R1150R