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  1. Replies
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    Replacing that spring is about the easiest thing...

    Replacing that spring is about the easiest thing you can do to the gearbox. I figure it should take about an hour.

    Don't use the kick starter unless you must. The internal gear wears quickly (left...
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    Help ID a camshaft

    Tearing down my R90/6 project, I've found a few interesting custom bits. Now, this...

    http://i1138.photobucket.com/albums/n521/ashburnrick/cad55e8b.jpg...
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    Why do you need a steering lock? It's not the...

    Why do you need a steering lock? It's not the sort of bike you leave in a Holiday Inn parking lot overnight...
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    About the rockers... The various shop books...

    About the rockers...

    The various shop books describe using an alignment jig. I don't have an alignment jig, and don't even see any around.

    Is it needed, or does one just line those things up...
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    Awesome. Many thanks for the explanation and...

    Awesome. Many thanks for the explanation and links.
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    Sorry...but I get lost in the non-visuals here....

    Sorry...but I get lost in the non-visuals here. Ground this, short that...it means nothing to me since I'm a visual type. Does anybody have a video or photo gallery of this method and setup?
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    If you ever replace the rings, install the oil...

    If you ever replace the rings, install the oil ring with the gap up, at 12 o'clock. That helps, I hear...
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    It's like my dad used to say about our rotting...

    It's like my dad used to say about our rotting boathouse...

    As long as the termites keep holding hands, we're fine.

    New synth will require all new seals....which are a good idea anyway.
  9. Replies
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    Picking up my new R90 cylinders today and...

    Picking up my new R90 cylinders today and dropping them off at the machine shop. Several people smarter than me recommend against boring the 74-75 R90 out to 94mm, despite the fact that it was done...
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    Apparently, oil turns acidic when it sits for a...

    Apparently, oil turns acidic when it sits for a long time. A little pool of oil sat in that cylinder. The damage is at the top of the cylinder, right in the "firing line." That side smoked badly....
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    I found out that putting the newer R100 cylinders...

    I found out that putting the newer R100 cylinders on my motor won't work without using R100 heads. And that is way to expensive and complicated.

    I was referred to a machine shop by Dave Gardner...
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    Does anyone have direct experience with having...

    Does anyone have direct experience with having that done? Cost, for example...?
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    I'm considering two options. First, used 900s,...

    I'm considering two options. First, used 900s, and bore them to first-over with new pistons.

    Cylinders - ~$275
    Pistons ~$360
    Machine work ~300

    Or - get a used set of R100 Galnikal cylinders...
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    Just eyeballing it...it's deep enough to go to...

    Just eyeballing it...it's deep enough to go to the next oversize.

    Problem with boring it further...on closer inspection it seems these are 900 cylinders, bored out to 1000. So the iron sleeve is...
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    The other one is perfect, with spot-on clearance...

    The other one is perfect, with spot-on clearance specs.
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    I see nothing wrong with those bikes. Maybe not...

    I see nothing wrong with those bikes. Maybe not my personal design taste, but then again 99% of products aren't. Nobody here knows how those bikes started out and old beemers aren't all destined for...
  17. Thread: Max BMW

    by BimmerCrab
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    1,042

    It's not a "bug"...it's a "feature." :-)

    It's not a "bug"...it's a "feature." :-)
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    FWIW...I had a inkling to check the rear main...

    FWIW...I had a inkling to check the rear main bearing because the RH con-rod bearing was also worn...beemerPhil gave me this advice on another thread...

    "The RH rod big end gets its oil from the...
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    rear main bearing remove/replace...

    Against good advice, I pulled my bottom end apart, as much out of curiousity as anything else. This bike ('70 60/5) has a questionable past, so I figgered I'd have some confidence going forward.
    ...
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    I've two used bikes that came with Corbins. Sold...

    I've two used bikes that came with Corbins. Sold 'em both and went OEM.
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    You're doing the right thing with the vapor...

    You're doing the right thing with the vapor blast. Some extra cost for shipping, but I'd easily trade $75 round-trip shipping for not having to do all the stupid cleaning I did. I'll send them...
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    I looked over what Shane has done. Before doing...

    I looked over what Shane has done. Before doing my R60/5, I have a little Honda CL175 to get running. I had the motor glass bead blasted...never again. That dusty crap is in every nook and cranny in...
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    No offense...but how is that "simpler"? Pull the...

    No offense...but how is that "simpler"? Pull the springs, buy lighter ones, install those, then take those back off...
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    Duplicolor Engine Enamel. DE1615 "Aluminum"...

    Duplicolor Engine Enamel. DE1615 "Aluminum" :thumb

    Just did my Honda CL175 motor case and cylinder head with that. Very, very nice.

    I tried hand-rubbing it on, but I liked it better sprayed....
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    Thanks, Phil! Great advice and much appreciated....

    Thanks, Phil! Great advice and much appreciated.

    BTW -- sand and rocks are in there because the PO smashed the oil pan on a gravel road and simply bolted a new one on it without even cleaning it...
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