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Thread: 1970 R75/5 #2970531 Restoration

  1. #46
    '99 '03 '06 National Co-Rally Chair Friedle's Avatar
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    Restoration

    Quote Originally Posted by tanker4me View Post
    Attachment 63372

    You already know about that!
    Does Irv stock that cool red slash decal across the starboard side flank? Oh, oh ..... You were talking about the motorcycle.

    Friedle
    Ride fast safely

  2. #47
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    Quote Originally Posted by tanker4me View Post

    You already know about that!
    Great pic .... and bike!

  3. #48
    My 2970306 has that same VIN sticker, except yours is in slightly better condition. Of course, the VIN is also stamped just around the corner from it on the right side frame gusset.
    Anton Largiader 72724
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    Virginia Motorrad Werkstatt BMW motorcycle service and repair in central Virginia

  4. #49
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    Tires

    So this bike came with a front Metzeler Lasertec and a rear Metzeler 880 Marathon. Both have great tread and date codes of 2009. Any opinions on if I should:

    A) Leave them
    B) Replace rear with a matched Lasertec from front.
    C) Replace front with a match Marathon from rear.
    D) Replace both with something new and/or different ... Bridgestone BT45?
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  5. #50
    Liaison 20774's Avatar
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    Eight years seems quite long on tires. Depending on location/weather/exposure, sidewall cracking will begin to show which severely limits the usefulness of the tire.

    Personally, I wouldn't worry about have mismatched brands front/rear. Tires/rubber is pretty much universal these days.
    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!

  6. #51
    Rally Rat 1074's Avatar
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    Tires?

    Replace them. As for what to put on, take your pick! Don't want to start a new tire war based on brand and in. vs metric sizing!
    Boxerbruce

  7. #52
    rabid reader dbrick's Avatar
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    Even if you cannot see cracking, over time ozone will have caused the tires' rubber to harden; because hysteresis is reduced, the tires' ability to grip the road will also have declined.

    I wouldn't ride 8 year old tires around the block.
    David Brick
    Santa Cruz CA
    2007 R1200R

  8. #53
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    I've got serial# 2970055 and the turn signal indicator is on the right side of the headlight nacel

  9. #54
    Registered User ebeeby's Avatar
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    Quote Originally Posted by dbrick View Post
    Even if you cannot see cracking, over time ozone will have caused the tires' rubber to harden; because hysteresis is reduced, the tires' ability to grip the road will also have declined.

    I wouldn't ride 8 year old tires around the block.
    +1 except I'd ride it around the block. 8 years is too long in the tooth - new tires will make an amazing difference.
    1973 R75/5

  10. #55
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    I bought a stainless steel bolt kit. As I replace some of the ugly old bolts and then also with reassembly, what is the thought on grease, anti-loc, loctite or just dry? Seems to be many different theories.
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  11. #56
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    Thumbs down Heat Cycle

    Quote Originally Posted by dbrick View Post
    Even if you cannot see cracking, over time ozone will have caused the tires' rubber to harden; because hysteresis is reduced, the tires' ability to grip the road will also have declined.

    I wouldn't ride 8 year old tires around the block.
    In addition to ozone, repeated heat cycles dry out the oils in the rubber and tires become ice skates.
    Roger Wiles
    roger@rogerwiles.com
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  12. #57
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    Quote Originally Posted by tko11 View Post
    I bought a stainless steel bolt kit. As I replace some of the ugly old bolts and then also with reassembly, what is the thought on grease, anti-loc, loctite or just dry? Seems to be many different theories.
    Copper based anti seize paste is a must in most but not all fasteners applications. NOT on spark plug threads; they go in dry. Dissimilar metals, i e SS machine screw into steel or aluminum begs for anti seize paste. Grease is mostly short term and valueless. Loc title is necessary where it is necessary to secure critical fasteners. Loc rite and anti seize are NOT compatible. Torque values used to secure a fastener using anti seize must be reduced somewhat because the friction elements of dry threads are reduced-be careful!!!
    Roger Wiles
    roger@rogerwiles.com
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    706.897.8266 24/7 Wireless

  13. #58
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    Loctite

    Loctite
    Roger Wiles
    roger@rogerwiles.com
    www.rogerwiles.com
    706.897.8266 24/7 Wireless

  14. #59
    Liaison 20774's Avatar
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    Generally speaking on the run of various stock fasteners around the bike, I can't think of any that have any kind of Loctite, sealant, oil, etc. The oil pan bolts probably can use a non-hardening sealant to prevent oil from wicking down the threads. Other engine interior bolts use Loctite plus the driveshaft output flange bolts. But in general, I don't see where anything else is used. I good selection of wavy washers is certainly needed.

    Note that stainless is a bit more slippery and if you're considering a torque wrench on any of these bolts/nuts, you can easily over torque as fastener. Also, check out Snowbum's section on this...he has other cautions like using anti seize to prevent galling of the threads. Not needed on OEM bolts, though.

    http://bmwmotorcycletech.info/hardware.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!

  15. #60
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    Progress, going back together.
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