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Thread: 1970 R75/5 #2970531 Restoration

  1. #31
    Registered User lmo1131's Avatar
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    OK, hijack off. I just have a weakness for these.
    Hijack back ON.

    Me too.

    Me too.jpg

    Hijack back OFF
    "It is what you discover, after you know it all, that counts." _ John Wooden
    Lew Morris
    1973 R75/5 - original owner
    1963 Dnepr

  2. #32
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    Quote Originally Posted by lmo1131 View Post
    Hijack back ON.

    Me too.

    Hijack back OFF
    Yes!!!!

  3. #33
    Liaison 20774's Avatar
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    Carbs 64/32/313 and /314 are listed for an R75/6. Just about all of the jet/needle sizes are different than say the /9/10 carbs.
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  4. #34
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    More progress today. This bike is responding so well to cleaning I may stop disassembling at this point.
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  5. #35
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    Quote Originally Posted by AntonLargiader View Post
    FWIW I have 2970304 I think. A few hundred earlier, made in November '69
    This is so cool, yep yours just 'a few' earlier. It looks like mine was built in December of '69.

    I thought these had a VIN plate with rivets, only a decal here .... is this correct?
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  6. #36
    Liaison 20774's Avatar
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    I wonder if that tag is a replacement. I went to several sites and the show that VIN as being built in January 1970.

    http://www.bmbikes.co.uk/chassispage...chassis750.htm
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  7. #37
    Airmarshal-IL James.A's Avatar
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    Quote Originally Posted by 20774 View Post
    According to the Bing book, the carbs look like Type 64-3 which James pointed out has two screws to hold the dome onto the carb body. The original would have been Type 64 with four screws. The carb numbers would give it away. James said 64/32/9 or /10 would in the right range...could also be /1-/2 or /3-/4. If it's much bigger, then the carbs are for another model. Not to say they won't work provide the internals are set up to resemble /5 carb settings.
    About the carbs; the 9-10 carbs on my '73 are the ones installed when I bought it in 1989. No reason to believe they are not originals. I have also seen 9&10's on R75/6's. The 64/32/1&2 or 3&4 are earlier models and thought to be defective in airhead lore. On this 1971 R75/5 I recently picked up, there is a set of 3&4's in the extra parts boxes that came with it. I am confident that there is a good reason they are in a box apart from the bike. This '71 runs very well with the 2 screw, dome top Bings. I will check thru the service record to see when the previous owner did the change. He is one of our Airheads members from Illinois, and owned that bike since 1987.

    I suppose the question to the original poster would be just how original do you want it, and at what cost?, in terms of both expense and performance?
    1973 R75/5

  8. #38
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    Quote Originally Posted by James.A View Post
    About the carbs; the 9-10 carbs on my '73 are the ones installed when I bought it in 1989. No reason to believe they are not originals. I have also seen 9&10's on R75/6's. The 64/32/1&2 or 3&4 are earlier models and thought to be defective in airhead lore. On this 1971 R75/5 I recently picked up, there is a set of 3&4's in the extra parts boxes that came with it. I am confident that there is a good reason they are in a box apart from the bike. This '71 runs very well with the 2 screw, dome top Bings. I will check thru the service record to see when the previous owner did the change. He is one of our Airheads members from Illinois, and owned that bike since 1987.

    I suppose the question to the original poster would be just how original do you want it, and at what cost?, in terms of both expense and performance?
    Interesting information James, thanks for sharing! My bike currently has other non-original parts on it so doesn't really matter to me either way. Seems to run good as is, so I'll keep them. Interesting though, I was just looking at this bike ... see below. Nice early /5 bike that sold last year (for cheap if you ask me), was built about a year latter than mine and looks to have similar carbs ... was on the show circuit too.

    http://bringatrailer.com/listing/197...55-motorcycle/
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  9. #39
    For all practical purposes, the 9 and 10 are the original carbs for that bike. If you need a time capsule you could put the 3/4 on, with their funky spring-loaded chokes and so forth but they were replaced by the 9/10 early on, as in when they were current models or maybe when the /6 came out. There's a reason pretty much every R75/5 has them. My November '69 bike had them.

    FWIW I have a '74 R75/6 in the shop with 9/10, a '74 R90/6 with 11/12, and a '76 R75/6 with 13/14. Just to give you an idea when those carbs were introduced.
    Anton Largiader 72724
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    Virginia Motorrad Werkstatt BMW motorcycle service and repair in central Virginia

  10. #40
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    Here is my 47 year old tool kit. Looks like it has served well all those years. Do they sell replacement pouches/bags somewhere?
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  11. #41
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    Good bye Gold/Curry ....
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  12. #42
    Registered User lmo1131's Avatar
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    Looks like it has served well all those years. Do they sell replacement pouches/bags somewhere?
    What?!?! You don't like the history imbibed by that rich patina!!

    They're NLA from BMW, but show up on eBay occasionally (usually with some of the tools), and usually in just about the same condition as yours is. Wunderlich is offering a tool roll but it doesn't resemble the OEM version.
    "It is what you discover, after you know it all, that counts." _ John Wooden
    Lew Morris
    1973 R75/5 - original owner
    1963 Dnepr

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