The Rusty Brick - '92 K100RS

[bmwpyro]

Really Nice Bike there Marauder. exciting build!

[MaraudeRS]

Your picture was tantalisingly reluctant to reveal the full story after an inordinate amount of time waiting to download it but from the curvature of the item in question I imagined that what you are portraying is indeed perfectly satisfactory.Ah,the time it took to compose this answer has revealed what I was imagining exactly as I thought...No worries!

So eloquently put! Not sure how long it took you to compose but it's impressive :) I'll load smaller pics in hopes that they'll load quicker for you.

Really Nice Bike there Marauder. exciting build!

Thank you! Its so exciting for me to be working on it and learning how to do so. Which brings me to my next questions...does my water/oil pump look like it needs to be replaced or just cleaned and a leak found?
Does this brake pedal look like it should be replaced?
[emoji848][emoji13][emoji23]


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[The Dude]

So eloquently put! Not sure how long it took you to compose but it's impressive :) I'll load smaller pics in hopes that they'll load quicker for you. Thank you! Its so exciting for me to be working on it and learning how to do so. Which brings me to my next questions..

Jeez Marauder that pump block looks like shite.Stil,it's what's on the inside that counts.The brake lever looks a bit dodgy,mine's not quite that far gone but give 'em a good clean,dismantle and see what's what.You can get a reconditioned pump block if nescessery.It's an easy swap as long as all the stars line up.
Eloquancey expands or contracts in proportion to how much perceived time is available!
All the best.

[MaraudeRS]

Jeez Marauder that pump block looks like shite.Stil,it's what's on the inside that counts.The brake lever looks a bit dodgy,mine's not quite that far gone but give 'em a good clean,dismantle and see what's what.You can get a reconditioned pump block if nescessery.It's an easy swap as long as all the stars line up.
Eloquancey expands or contracts in proportion to how much perceived time is available!
All the best.

Yes it does look terrible. I'll ask google where a reconditioned pump block is available unless someone has a good source they wouldn't mind sharing with me. I believe something was leaking when the bike was last in operation. Time to bust out the trusty clymer manual to learn how to take it apart and figure out what's going on. I've found the brake pedal on eBay for around $20 so I'll order one of those up.

Eloquancey expands or contracts in proportion to how much alcoholic beverage  is consumed! Lol



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[Vespa no more]

Restrain yourself Laitch


 

[MaraudeRS]

No luck getting the bearings removed from the front wheel. Those suckers are in the TIGHT! I'm going to let the powder coater remove them since he has a tool for it.

I got the brakes all taken apart and cleaned up for the powder coater. Unfortunately, I only ordered a rebuild kit for one of the calipers instead of for both [emoji31].
I did get the bolts that hold the front brakes onto the wheel and the rear caliper bolts cleaned up. Here are some before and afters.
 
Gotta love a wire brush that attaches to a drill.


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[Vespa no more]

It's not as if your arms are un-tensioned when braking.


But I do agree that the slipperiness if better avoided


GF

[jakgieger]

Gotta love a wire brush that attaches to a drill.

In this situation(working on your bike), you might find that a cup brush on a 4.5" angle grinder will polish better.  Just make sure you have a GOOD hold on the grinder and the part you are polishing AND wearing safety glasses .  When using the cup brush, things occasionally take flight (including the grinder itself!).

[Vespa no more]

Angle grinder - second best electrical tool in the shed.


Eye protection a must. I had to take a mate of mine to the doctors to get a piece of wire (from a brass wire brush) out of his eye ball - and he was wearing a welding mask.


Make sure to spray something onto the cleaned metal - marine / lanolin (variation on WD40) work well


G

[MaraudeRS]

Angle grinder - second best electrical tool in the shed.


Eye protection a must. I had to take a mate of mine to the doctors to get a piece of wire (from a brass wire brush) out of his eye ball - and he was wearing a welding mask.


Make sure to spray something onto the cleaned metal - marine / lanolin (variation on WD40) work well


G

Thank you! I shall try my angle grinder

In this situation(working on your bike), you might find that a cup brush on a 4.5" angle grinder will polish better.  Just make sure you have a GOOD hold on the grinder and the part you are polishing AND wearing safety glasses .  When using the cup brush, things occasionally take flight (including the grinder itself!).

I just grabbed a fine and coarse from my local hardware store. Already started using the fine brush on the rear package holder and it's working well. Pics to follow


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[MaraudeRS]

Got the brake lever replaced today. I think the one I bought was off a different bike but it fit without any problems. Anyone want to buy my old one? Lol


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[MaraudeRS]

A little more progress to report. I got the wheels and brake calipers back from the powder coater the other day and I love the way they look.

I inadvertently picked a color for the wheels that almost perfectly matches my Ford F-250. It's a dark royal blue and probably my favorite color. The brake calipers are gold, and even tho I'm not a huge fan of gold, I think they look perfect.

Next up is to rebuild the calipers, (of which I have all the necessary parts), mount the tires onto the wheels, install the new wheel bearings, put the brakes back together onto the wheels, and mount it all up.

Also, i still need to flush the coolant and check the air filter.


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[MaraudeRS]

I need to drain and flush the coolant and the Clymer manual says I need to pull the gas tank for that. It also says I need to pull the tank to check and/or replace the air filter. I have an oil suction device that I used to remove the fuel from the gas tank, can I use it to suck out the coolant and simply refill it with new mix? Is there a way to get at the air filter without pulling the tank? I'm not trying to be lazy, I'm trying to be strategic with the limited time I have to put into this restoration. TIA


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[Laitch]

I have an oil suction device that I used to remove the fuel from the gas tank, can I use it to suck out the coolant and simply refill it with new mix? Is there a way to get at the air filter without pulling the tank? I'm trying to be strategic with the limited time I have to put into this restoration.

You could unclip the rear of the tank and pivot it upwards to get to the radiator cap. You don't need to raise the tank to replace the air filter. Harris has a video showing how it takes three minutes.

Impatience is an obstacle. A restoration involves a thorough inspection. A rusty brick needs its operating system restored regardless of the level of effort involved.

The tank should be removed so you can clean and inspect electrical connections beneath it with ease. The cover of the air filter should be removed so the air box can be cleaned of debris.

The coolant system should be flushed with coolant system cleaner before new coolant is added. There are particulates throughout its neglected system that will resist being removed by a suction device and will continue to affect efficient cooling. Several threads and sources are available on this site and the Web to help you. Effective, simple procedures have been developed to clean the system. I grant that they are not simple enough for everyone.

Shortcuts are being considered. Excuses are being made for them. Impatience is making inroads. If that is allowed to continue when learning to ride and riding, too, the rider has a greater chance of becoming a danger to others, and a fatality statistic.

[Vespa no more]

Re: Particulates in the cooling system.


While servicing my K1100 bike / project... I pulled the lower radiator hose that connects to the water pump. There were some "particulates" that looked like worm castes or mud wasp casings. Couldn't believe that this crap was in there. The water pump pipe that goes into the hose was corroded and will need replacing.


Long story short... pull the radiator off the bike and clean it inside and out. Maybe get rid of all the loose stuff and respray the outside. Reverse flush the radiator with a hose. Expect debris in the water pump. Short cut this now and you'll have a break down somewhere isolated later. The beautiful blue of your rims will piss you off even more.


Guy

[MaraudeRS]

Re: Particulates in the cooling system.


While servicing my K1100 bike / project... I pulled the lower radiator hose that connects to the water pump. There were some "particulates" that looked like worm castes or mud wasp casings. Couldn't believe that this crap was in there. The water pump pipe that goes into the hose was corroded and will need replacing.


Long story short... pull the radiator off the bike and clean it inside and out. Maybe get rid of all the loose stuff and respray the outside. Reverse flush the radiator with a hose. Expect debris in the water pump. Short cut this now and you'll have a break down somewhere isolated later. The beautiful blue of your rims will piss you off even more.


Guy

Thank you for the excellent description and warning. I'll do as you recommend.

You could unclip the rear of the tank and pivot it upwards to get to the radiator cap. You don't need to raise the tank to replace the air filter. Harris has a video showing how it takes three minutes.

Impatience is an obstacle. A restoration involves a thorough inspection. A rusty brick needs its operating system restored regardless of the level of effort involved.

The tank should be removed so you can clean and inspect electrical connections beneath it with ease. The cover of the air filter should be removed so the air box can be cleaned of debris.

The coolant system should be flushed with coolant system cleaner before new coolant is added. There are particulates throughout its neglected system that will resist being removed by a suction device and will continue to affect efficient cooling. Several threads and sources are available on this site and the Web to help you. Effective, simple procedures have been developed to clean the system. I grant that they are not simple enough for everyone.

Shortcuts are being taken. Excuses are being made for them. Impatience is making inroads. If that is allowed when learning to ride and riding, too, the rider has a greater chance of becoming a danger to others and a fatality statistic.

Thank you. I'll follow this advice.

Effective, simple procedures are all I'm looking for. I'm certainly not trying to be impatient, make excuses, or take shortcuts. I'm just trying to manage my time wisely, since it's limited, rather than take unnecessary steps that would otherwise cut into my available time.


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[Martin]

A wise man once said the Oxen is slow but the Earth is patient. And softly, softly catchee monkey.

[The Mighty Gryphon]

Patience, Grasshopper.  Motorcycle maintenance is like foreplay.  The slower you go the better the ride.

[MaraudeRS]

Patience, Grasshopper.  Motorcycle maintenance is like foreplay.  The slower you go the better the ride.

Well stated, my friend! I'm in no rush to get the maintenance done as I'm thoroughly enjoying the wrenching and learning.

A wise man once said the Oxen is slow but the Earth is patient. And softly, softly catchee monkey.

Indeed!


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[MaraudeRS]

Update: the brick is still rusty🤣

Unfortunately, I haven't had time to do anything to the bike. I have been turning it on and running it for a few minutes a day and unfortunately I discovered a gas leak. I see a drip on the front right corner of the tank and fuel on top of the motor next to the air box. I was hoping to only have to take care of the deferred maintenance and make some cosmetic changes but it looks like I'll have to become a full-blown mechanic. When I run the engine I get smoke coming from between the tank and engine. Is this an issue that's familiar to anyone? If the tank is leaking can it be repaired or will it have to be replaced?

In other news, I got my pirelli tires in and installed on the wheels. Thanks to ups loosing my rear tire I ended up with two because the company sent out a second one and a week later the first one showed up. Score!


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[Filmcamera]

The leak should be fairly easy to fix, it isn't unusual to get some pin hole leaks, my tank had been fixed in the past as well.


As for the smoking, I guess you have done a bunch of cleaning and degreasing and various things to the engine, I know I did.  The first few times I started mine it smoked like it was about to burst into flames but since I was confident there were no leaks etc I trusted to my luck that it was just residue boiling off and that turned out to be the case, I get zero smoke of any type now.


Wow great score on the tyres, lucky you!


BTW the spieglers are in and installed and now I am actually riding it I can say they seem to perform very well.

[MaraudeRS]

The leak should be fairly easy to fix, it isn't unusual to get some pin hole leaks, my tank had been fixed in the past as well.


As for the smoking, I guess you have done a bunch of cleaning and degreasing and various things to the engine, I know I did.  The first few times I started mine it smoked like it was about to burst into flames but since I was confident there were no leaks etc I trusted to my luck that it was just residue boiling off and that turned out to be the case, I get zero smoke of any type now.


Wow great score on the tyres, lucky you!


BTW the spieglers are in and installed and now I am actually riding it I can say they seem to perform very well.

Once I track down the leak and know for sure that it's the tank I'll remove it and have it repaired. While I have it off, that's when I'll check the air filter and flush the coolant system.

I think you're right about the smoking. There is still quite a bit of debris on to of the motor from it having sat for so long. That coupled with the fuel that's leaking onto it. While the tank is removed I'll do a thorough cleaning of that area.

Yes, I scored on the tire!

Great to hear about the Spieglers, thank you! I'll have to contact them when I'm ready to replace them to see if they can do a custom size since I'll be replacing the handlebars.


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[Laitch]

Thanks to ups loosing my rear tire I ended up with two because the company sent out a second one and a week later the first one showed up. Score!

Is this the path to good karma? Stay tuned!

[MaraudeRS]

Is this the path to good karma? Stay tuned!

Personally, I don't believe in karma. But I did get a hold of the company and they told me that the tire is paid for so I can keep it. Am I in the wrong?


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[Laitch]

Am I in the wrong?

Maybe somebody will come along who is interested in answering that for you, if you can't answer it yourself.