1986 R65 Cafe Racer project 'Death Racer'

Discussion in 'Airheads' started by violetpop, Jul 22, 2013.

  1. Voltaire

    Voltaire Titanium and Ceramic Hipster

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    I've got Tarrozzi's on my race bike, I find the rear brake works but not as good as stock, my race mate has a cable on his much better, just saying.
  2. Travmoto

    Travmoto almost there...

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    This is turning into the best cafe ever:clap Kudo's mate!

    By the way I prefer the 'X' and think it looks way better.
  3. VietHorse

    VietHorse Long timer

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    Recalculating... recalculating.... HCMC-Vietnam :)
    YES! I love X ! :rofl
  4. violetpop

    violetpop Been here awhile

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    Cheers, gents... Very happy with the fab work so far.
  5. AntonLargiader

    AntonLargiader Long timer

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    Last summer you put in the new rear main seal. Is it just the way it looks, or is the lip facing outward? It needs to go inward. The seal goes in, and then the guide ring goes in so that the lip goes the right way.

    The thin rings I see look like the spiral groove that's supposed to be running against the OD of the guide ring.


  6. violetpop

    violetpop Been here awhile

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    Yes, you are correct, it is facing outwards. I assumed this was the correct way in re fitting the seal. What is this guide ring you mentioned?
  7. Kai Ju

    Kai Ju Long timer

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    The piece that the seal rides against with the five holes in it, six if you count the one for the clutch push rod.. On the earlier airheads it was part of the flywheel, on the later ones it became a separate piece. I'm sure Anton can tell you what years that applies to.
    I'm surprised it's not leaking, to be quite honest.
  8. violetpop

    violetpop Been here awhile

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    Well, it's not leaking because the bike hasn't been started. I thought that ring was part of the crank. I've fitted many rear man seals (in automotive applications) and they've sat just like the I put this one. If it's wrong, I will most definitely look at setting it up correctly while the bikes apart.
  9. Kai Ju

    Kai Ju Long timer

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    Here is the parts diagram for your bike and it does use a Guide Ring, ref. # 5.

    http://www.maxbmwmotorcycles.com/fiche/DiagramsMid/B0000025.png?v=04302013

    Also, if this has not been mentioned as of yet, please block the crank so you don't have to worry about ref. # 1 falling off it's pins and self destructing when you tighten the flywheel bolts. Blocking the crank is where you prevent it from moving forward in the crankcase by either tying a strap across the front at the alternator ( my preference) or inserting an allen socket that you then hold in place with the front cover.

    http://www.maxbmwmotorcycles.com/fiche/DiagramsMid/B0000026.png?v=04302013

    I don't know whether your RMS has been rendered useless by the incorrect installation so you might play it safe and replace it.

    Nice catch, Anton.
  10. violetpop

    violetpop Been here awhile

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    I will check this out properly when I get to a computer but cheers for the heads up!
  11. violetpop

    violetpop Been here awhile

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    I'm just trying to get my head around how is go about changing it. I'm also away from the bike but when it's back I plan to do a top end rebuild so while I'm working on it, I will have a proper look at the rear seal. Thanks for the sharp eyes and information gents!
  12. AntonLargiader

    AntonLargiader Long timer

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    If you can pull that center part (the guide ring) straight back through the seal, you should be OK. The seal is meant to fit over it, so it should fit over it backward as well. Then push the guide ring back into place and the seal lip will be correct. Obviously you'd want to take a good look at it when you have the chance.

    Yes, you should block the crank to make sure it does not move forward. If you never had the guide ring off, the crank has probably not moved forward yet. If it had, you'd have trouble turning the crank after you tightened the flywheel bolts.
  13. Kai Ju

    Kai Ju Long timer

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    When I was working on these for a living I was taught that the inside seal lip is to be installed dry, as is the mating surface on the guide ring/flywheel. The explanation given was that the Teflon applied to the seal would transfer to the mating surface forming a Teflon to Teflon wear surface. If the seal or mating surface was lubed that transfer would not take place, hence the dry installation.
    Consequently I've always installed these seals dry on the inside lip with a bit of lube around the perimeter of the seal to ease installation.

    True or false ?

    To the OP, if you are going to reuse the RMS, gently flip the seal lip forward before you slide the guide ring back on.
    As Anton already mentioned, that guide ring needs to come off straight or it'll cock on the crank and become a bit of a bear to remove. ( There are so many double entendres in this last sentence it's scary...:D)
  14. Kai Ju

    Kai Ju Long timer

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    One more to the OP.

    Interesting subframe solution but I'm surprised that the upper two rails were attached to the original mounts, it might have looked a bit cleaner if it were attached like the lower rails. ( BTW, that's merely my opinion and it's not my bike or build. Furthermore I really hate it when total strangers spout their opinions on my builds, so just tell me to F off )
    I do like the X bracing, haven't seen that one before. Will the tail section/hump follow the contour of the subframe ?

    Having said all that, I really like where you're going with this bike. Looking forward to seeing it progress.
  15. violetpop

    violetpop Been here awhile

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    Thanks mate, your information will come in handy down the track when I strip the job again and do it properly!

    I totally see where you're coming from on the subframe and was thinking exactly the same thing just the other day. In saying that, that part of the subframe will be hidden by the cowl it self.

    Yes, the cowl will under go a slight trim towards the back (to show off the rear section of the subframe) and will follow the lines of the frame. We used the same cowl that the fabricator used on a cb750 he built for himself. When I was at the shop, he pulled it off his bike to see how it looked and it got well straight off the bat. This a a poor picture to show the cowl but it's still a pretty impressive motorcycle. Thanks for the kinds words mate! Should be an interesting bike once done. Might not be everyones cup of tea but thats ok, ill enjoy it.

    [​IMG]
  16. violetpop

    violetpop Been here awhile

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    Yo Kai Ju i forgot i did not put a picture with the cowl at all so here is one, hope it gives a better idea! So just above to top shock mount it will be trimmed to be straight and take that slight curve out and then at the back it will be trimmed to partially show off the rear frame. The rear of the tank has also been raised about in inch.

    [​IMG]
  17. Kai Ju

    Kai Ju Long timer

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    I actually like the curve on the front of the tail section. The way I look at is that the bottom of the tank isn't straight either and the way it looks to me you have a gentle wave that starts at the rear of the tail and blends into the contour of the tank. If it were mine (here we go again) I'd leave it the way it is.

    Here is a link for your builder in regards to the VTR in the back ground:
    http://advrider.com/forums/showthread.php?t=578094
    go to post #12 to see my interpretation of a VTR.
  18. violetpop

    violetpop Been here awhile

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    Yeah I hear what you're saying and you know what the problem is, you me, someone else, the neighbour would do it all differently many time over. I'm just going on the fly, a way which looks good and works! Other wise I'll be scratching my head unable to make a decision.

    In regards to the vtr... Great bike! I had one also in red.. Kept it fairly stock but clean... Really nice bike and my only grip would be the super soft front end. Nothing some fork springs and oil wouldn't fix though!
  19. violetpop

    violetpop Been here awhile

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    Some more updates.

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  20. Travmoto

    Travmoto almost there...

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    NICE!

    Are the tips going to exit through the rear cowl? Thats different and should look great.

    And is that a hotdog as a muffler? She's gunna be loud!