Snowflake Mag meets Honduran Pothole... Stuck in Nicaragua ADV SOS!

Discussion in 'Airheads' started by Byron1, Nov 2, 2012.

  1. Byron1

    Byron1 Been here awhile

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    Of course! Yeah it is pretty easy getting the front wheel off, I tried that before but the centre stand collapsed as you say.. I never thought about using a strap to tie it to the header cross over.. genius! Thank you!

    Re the Aluminium... yes they are powder coated. Will make sure to clean them up proper myself before getting them welded.

    Big Bamboo: Great tip on the cab drivers as well!
    #41
  2. Byron1

    Byron1 Been here awhile

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    I dont intend this to turn into a ride report, but thought I would share with you the events of the last 24 hours as our recent run with things happening to the bike has been "interesting" for us.

    As we were heading through San Jose, we thought it a good time to find a place to get a nice new rear tyre as the old one was past it. We found the BMW garage and they happily fitted a nice new Pirelli for us. As we were leaving one of the mechanics I had been chatting too handed me a 24hour emergency breakdown card and said if ever we needed them (while in Costa Rica) just call... I thanked him, put the card in my pocket and thought that would be the end of it... :evil

    Yesterday before leaving San Jose, we looked at the map for our options South and decided the curvy Carretera 2 mountain road looked like it would be a good place to scrub the new back tyre in. As soon as we approached the mountains, the heavens opened and we got a soaking. We continued up this road for a good hour and a half all the time getting drenched and struggling with visibility.

    As we were riding the bike started to splutter... I opened up the throttle to see if it would clear and it did... 2 minutes later the same thing but worse this time it wouldnt clear and the bike completely stalled.

    Pulled over to the verge and a quick investigation showed there was no spark.Ignition seemed to be ok - voltmeter on 12, lights working, engine would turn over. Changed the plugs - still no spark. Changed the HT leads... Spark, but only a small orange one.

    As we were getting drenched, it was freezing (I never knew Costa Rica would be cold?!) and we were very precariously positioned at the side of the road with lorries screaming past I decided to put the plugs back in and give it a whirl.

    I am not going to make excuses for what happened, but somehow I ended up crossing the thread on the RH cylinder spark plug. :baldy so cross with myself as I am always so careful not to do this.

    I took the spark plug out to see how bad I had done it and as I did so a few slivers of metal (from the knackered thread) fell down into the barrell. At this point I was almost sick :puke2

    What a numpty.

    While it was only a few small bits of aluminium and I was very tempted in my anger to just screw the fcking plug in and hope it got sent straight out the exhaust, I knew this was a bad idea and would be tempting fate so decided to do the decent thing and hide the keys and try to find a way down the mountain and back to San Jose.

    At this point it was starting to get dark and we were both very wet, cold and miserable. I remebered about the card I was given and felt a sigh of relief only dampened by the fact that we didnt have a phone! Long story short, we managed to flag someone down who had a phone but no signal and they towed us to a cafe where we could call and then wait for assistance.

    3 hours later we were picked up by Johnny form BMW San Jose and were in a truck shivering, but glad to be back on our way to San Jose. By that time the weather was so bad it took us another 2 hours to get down the mountain and then an hour making our way through San Jose. Before dropping us at our hostel Johhny offerred for us to use the workshop at BMW the next day and any tools we needed to get it fixed...

    Today has been spent removing the RH cylinder head and getting the plug hole heli-coiled.

    I was so glad I didnt try and start the bike again as when I took the head off there was loads of aluminium thread in there that fell out and even some that had got (almost) down the side of the piston:

    [​IMG]

    So it all got cleaned up, decoked, a helicoil inserted and put back together.

    When I took the rocker assemblies and pushrods off, I was carefull to make sure I noted which side was which and which end of the pushrod was top / bottom etc. I am 99.999% sure that when I took the rocker assemblies off I didnt rotate the pin that holds them together, but once I had it all back on the bike and was checking the valve timing, I noticed that on the intake side there is a mark at the top and the exhaust side there is one at the bottom (see little holed marks below):

    [​IMG]


    I am sure this is how it must have been before and it runs fine like this, but is that correct?? Should those marks not both be at the same position??

    Anyway one problem fixed and now to try and sort out the original problem... no spark. Ok, so once it was all back together I spun the engone over to check for a spark and there was a nice fat bright blue one!

    Why had that decided to come back now, and what made it dissapear yesterday?? I assume the moisture, but when I looked at the coils to change HTs yesterday they were both as dry as a bone.. not sure how they could have got wet. The ignition switch and seemed to be working fine as the starter worked ok... if the ignition switch was wet this wouldnt have happened right. I also looked at the points today they were fine, plenty of life left in them and gapped ok.

    Anyone have any ideas? :ear We are just going to keep riding tomorrow now it is running as we need to make it down to Panama to catch a boat. I hate having something lingering at the back of my head waiting to go wrong again so as always, any advice is much appreciated.

    Tried asking the BM wrenches their opinion why it fixed itself today but my Spanish isnt quite at a technical level yet... they shrugged and said "Solo dios conoco" Only God knows!

    Again, we have been so lucky to meet such fantastic people who were happy to help us out. A massive thank you to all of the workshop staff at San Jose BMW for letting me use their bench especially Johnny and Adolfo for refusing any money for the Helicoil!

    [​IMG]

    Either God / karma / whatever you believe is repaying me for being really good in a previous life, or God / Karma / whatever is preparing me to massively help out someone in the future.. that I will do with pleasure :rofl
    #42
  3. Clay Spinner

    Clay Spinner Been here awhile

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    I hear having a set of worldbeaters in like having two angels riding along with you :norton Good luck with the rest of the trip!
    #43
  4. Wirespokes

    Wirespokes Beemerholics Anonymous

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    Sorry to hear of your troubles - hope this was the last and it's clear sailing from here on!

    My guess on the ignition trouble would be the wires or plug caps. Perhaps the insulation or connections aren't the best and the deluge shorted them out. When it gets dark take a look under the tank with the engine running and look for arcing. Perhaps mist some water on the wires and caps.
    #44
  5. Rob Farmer

    Rob Farmer Long timer

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    [​IMG]

    The dots need to face outwards and be on top. The oil gallery is angled to flow oil from the oil route around the top stud into the needle bearings in the rocker arm. If you have it the way round the oil gallery doesn't work and you end with a reduced oil flow through the bearings.

    I see on the pictures that your bikes a V reg so may be a 1979 or 80 model. Are you running points? They sit under the front engine cover in what's known as a "Bean can" and may be the source of you problem.
    #45
  6. hardwaregrrl

    hardwaregrrl ignore list

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    Rob, he mentioned checking the points. But I think you need to take a really good look at your coils.
    #46
  7. Rob Farmer

    Rob Farmer Long timer

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    Missed that bit.
    #47
  8. Byron1

    Byron1 Been here awhile

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    Thanks Clayspinner.. Those panniers are amazing. Can't recommend them or Vern at www.projectvnd.com enough! He is a top bloke and spent the weekend with me customising them exactly for our bike.
    #48
  9. Byron1

    Byron1 Been here awhile

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    Thanks for all the suggestions re the spark. We set off again this morning all running fine and sure enough 20 miles down the road it started spluttering. ha ha ha!

    Pretty sure it was related to the coils as when it was happening the tacho needle dropped from 3k revs to 1k then bounced back up again.. If I am not mistaken the tacho works off the coils?

    Whipped the tank off and had a really thorough poking about. Cleaned all the terminals going onto the coil and made sure all wires were decently connected. As it happened, the jumper wire between the two coils was pretty loose on one side and came off without any resistance when I pushed it. I crimped it on as best I could, put the tank back on and hey presto! No more spluttering and it ran fine for the rest of the day. :D

    Hopefully that's that now fixed and that wire not making the proper connection hasn't done any damage to the coils :ear??

    As regards the valves. That is going to keep me awake all night. First thing in the morning I will swap it around so it is in the correct position. We did about 150 miles today.. I hope to god I haven't damaged the needle bearings.

    Fortunately we have family coming to visit us in Columbia in December... If I am swift I can put an order in to Motor Works and get them to bring a new set of needle bearings with them. Are there any other parts (related to that issue) I should get them to bring along? :ear

    Was just reading another post on here where someone stripped the adjuster nut threads. Going to get a couple of them and stick them in my tool box for good measure too.

    Thanks as always, Byron.

    Just had an email from a mate back home asking if we wish we had taken a newer bike? If he has to ask I guess he will never understand. :lol3
    #49
  10. Wirespokes

    Wirespokes Beemerholics Anonymous

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    I doubt the bearings got damaged after 150 miles. There was probably enough oil flow to keep them lubed - you weren't red lining the bike or working it all that hard, right?
    #50
  11. Rob Farmer

    Rob Farmer Long timer

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    I wouldn't worry about the needles they aren't easy to swap. Just align things as soon as you can.

    As for Vern being a top bloke. Are we talking about the same bloke?....He is a top guy just done't let him know I said so. They threw away the mould after they'd made him :D

    [​IMG]
    #51
  12. Byron1

    Byron1 Been here awhile

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    :rofl

    Definitely one of a kind! Ha ha ha!

    Wirespokes and Rob.. Thanks for the advice abouts the bearings. No, no red lining, moderate cruising only. I swapped it around this morning. While there I had a Iittle feel to see what they were like but didnt take them out, They did feel a tiny little bit gritty but not so much that it will keep me up at night. Will probably get a new set sent over for good measure anyway... They are not cheap though... 30 quid for a set.

    What is so difficult in swapping them over? Do I need a press to get them out?
    #52
  13. Rob Farmer

    Rob Farmer Long timer

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    You can press them out using a small socket and a large vice. Have tube or a larger socket the other side to press them into. If the bearings have been starved of oil the spindle may be worn. If you try and inspect the spindle with your current bearings there's a risk of the needles falling out that's why it was suggested that you simply turn the spindle for the time being.
    #53
  14. woodly1069

    woodly1069 Long timer

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    Hey guys I know this thread has been idle a while but I have a question. I have a 1972 R75/5 that I needed to do some cylinder work to so I took everything apart and set it on the shelf in the shop while I did the work. Well it took a while to get things sorted and I put her back together last weekend pulling from the shelf as I remembered. The bike seems to run fine after a first quick fire up and does seem to be oiling but here is the issue. I have now found this thread and your bikes are different than mine. Where you reference a detent to be put up and out all I have is this...

    [​IMG]

    [​IMG]

    On the bottom is this...

    [​IMG]

    Like I said, it seems to be OK but now I don't want to ride it and tear it up! :eek1

    Any thoughts would be appreciated!
    #54
  15. hardwaregrrl

    hardwaregrrl ignore list

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    Looks good to me....some rocker arm info. Have you checked end play as there should be zero....did you replace the wave washers?
    #55
  16. woodly1069

    woodly1069 Long timer

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    Ok, this will sould really stupid...to what end play are you referring? and wave washers where? Guess I need t o check out your link. Thanks!
    #56
  17. 100RT

    100RT Long timer

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    I'm late to read all of your postings and am glad it is coming together after all the problems. Regarding the split rims, you are proof that running tubes in snowflakes is the way to go!
    Good Luck and thanks to all that have helped you out!
    #57
  18. hardwaregrrl

    hardwaregrrl ignore list

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    The rocker arm play. If you grab the center of the rocker arm and try to move it up and down, there should be no play....meaning....you shouldn't be able to move it up and down. Here is another link.
    #58
  19. ZEmann

    ZEmann want to be riding

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    thanks for diggin this up

    first time I have seen it nice adventure
    #59
  20. woodly1069

    woodly1069 Long timer

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    awesome! thanks hardwaregrrl! Goes mine is OK then :D
    #60