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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => Project Custom Motobricks => Topic started by: Vento3600 on July 04, 2020, 01:12:02 PM

Title: K100RS
Post by: Vento3600 on July 04, 2020, 01:12:02 PM
Hi All,

Just joined and thought I’d ask a quick question if I may...

So I bought this 1990 K100RS for a cafe racer build, 20k miles on the clock but looks like it’s been out in the rain at some point in the last 30 years so it is by no means clean (certainly looks cleaner on the photos than in real life).

Anyway the question I have for you is; is this too nice to strip for a custom?

If I do strip it (and I’m literally holding myself back from taking a torx to it) should I keep the ABS?

Any input quick tips would be most appreciated.

Cheers.
Title: Re: K100RS
Post by: Vento3600 on July 04, 2020, 01:18:57 PM
Honestly it looks too good in those pics...

The frame is pitted on the top side; rear panel has a givi fitting and the plastics have blown around it; crack in the front plastics (repaired); fan switch installed (so you can turn your fan on at your leisure?); and a few more bits...

It isn’t concours, but a good base to build from?
Title: Re: K100RS
Post by: The Mighty Gryphon on July 04, 2020, 02:10:59 PM
I wish you hadn't posted those photos.
Title: Re: K100RS
Post by: Vento3600 on July 04, 2020, 02:13:05 PM
I wish you hadn't posted those photos.

It’s not that nice honestly...it just photos well...there’s also a chip in the tank if that helps...
Title: Re: K100RS
Post by: Laitch on July 04, 2020, 02:55:57 PM
If I do strip it (and I’m literally holding myself back from taking a torx to it) should I keep the ABS?
Sell the ABS. If you strip it into a cafe moto, you probably won't ride it enough to endanger yourself. Let the person who buys it from you sort that.
Title: Re: K100RS
Post by: Vento3600 on July 04, 2020, 03:20:52 PM
Sell the ABS. If you strip it into a cafe moto, you probably won't ride it enough to endanger yourself. Let the person who buys it from you sort that.

So +1 for strip and +1 for ditching the ABS.
Title: Re: K100RS
Post by: Laitch on July 04, 2020, 04:49:02 PM
So +1 for strip and +1 for ditching the ABS.
-1 for reading comprehension.  :laughing4-giggles:
Title: Re: K100RS
Post by: Vento3600 on July 04, 2020, 04:56:54 PM
-1 for reading comprehension.  :laughing4-giggles:

...and back to zero for the strip  177381
Title: Re: K100RS
Post by: Scott_ on July 04, 2020, 05:19:36 PM
Seeing as you are not here in the states, do you have to deal with MOT inspections.... The ABS removal may or may not be allowed as it is a factory supplied safety item.
It could also be a mute point as the bike is now 30 years old, but still something you need to check on.

I'm not one that is particularly in favor of cafe builds, I think they are more for show than go.
However if you can do quality work like this: http://specialks.net/
Title: Re: K100RS
Post by: AtLarge on July 04, 2020, 05:31:42 PM
-1 cafe. :nono2:
Title: Re: K100RS
Post by: Vento3600 on July 04, 2020, 05:36:13 PM
Seeing as you are not here in the states, do you have to deal with MOT inspections.... The ABS removal may or may not be allowed as it is a factory supplied safety item.
It could also be a mute point as the bike is now 30 years old, but still something you need to check on.

I'm not one that is particularly in favor of cafe builds, I think they are more for show than go.
However if you can do quality work like this: http://specialks.net/

No, theY just check the brakes and the road worthiness.  To be honest the front brakes have gone so anything I do with or without ABS would be a massive improvement.   Never used the rear brake so much before riding that home!
Title: Re: K100RS
Post by: Vento3600 on July 04, 2020, 05:41:08 PM
-1 cafe. :nono2:

If not cafe then what should I do with it?
Title: Re: K100RS
Post by: daveson on July 04, 2020, 05:45:02 PM
It’s not that nice honestly...it just photos well...there’s also a chip in the tank if that helps...

No that doesn't help. You're still not allowed to strip it,  sorry.
Title: Re: K100RS
Post by: Martin on July 04, 2020, 05:46:03 PM
In stock form they are one of the best looking paint combinations and rare in OZ. In OZ there are more cafés for sale than stock but I only know of one that's on the road. it is ultimately your choice, but if you chop it but you will loose practicality, rideability, functionality and luggage capacity. Most café projects don't get finished, and if finished ridden short distances for around 12 months. They are then put up for sale and eventually find their way to the back of the garage or behind the shed. Try riding it for a while OEM stock they are an incredible ride and one of the most reliable bikes if you maintain them and use them. If you deem to chop it the plus side is that you'll make a rare model rarer and your fairing can be used to restore other Bricks and eventually the drivetrain may be salvaged. 112350
Regards Martin.
Title: Re: K100RS
Post by: Vento3600 on July 04, 2020, 05:50:02 PM
No that doesn't help. You're still not allowed to strip it,  sorry.

But it can’t live in the condition it’s in...I actually get chills when I see the frame.
Title: Re: K100RS
Post by: Vento3600 on July 04, 2020, 05:54:07 PM
In stock form they are one of the best looking paint combinations and rare in OZ. In OZ there are more cafés for sale than stock but I only know of one that's on the road. it is ultimately your choice, but if you chop it but you will loose practicality, rideability, functionality and luggage capacity. Most café projects don't get finished, and if finished ridden short distances for around 12 months. They are then put up for sale and eventually find their way to the back of the garage or behind the shed. Try riding it for a while OEM stock they are an incredible ride and one of the most reliable bikes if you maintain them and use them. If you deem to chop it the plus side is that you'll make a rare model rarer and your fairing can be used to restore other Bricks and eventually the drivetrain may be salvaged. 112350
Regards Martin.

Thanks Martin, totally agree they do look good in this scheme.  As for riding it I’ve got a couple of others that are for riding, I was looking to get a bit more experience with working on bikes, but everytime I go in the garage I’m like ummm it isn’t that bad...then I get closer and I don’t know again.  I’m ok with refinishing it, but it would need pretty much the same amount of work as a cafe.
Title: Re: K100RS
Post by: daveson on July 04, 2020, 06:00:25 PM
"but it can't live in the condition its in..."

Yeah, it can. You can fix it or get used to it (or put it on the To Do list) I've got used to mine. It was used on dirt roads for years before I got it, rusty frame to boot. Maybe get another one with broken bits, and rip the bits off it. Your One's way too good.
Title: Re: K100RS
Post by: Martin on July 04, 2020, 06:27:02 PM
There is more pride in doing a good restoration than a chop job. It doesn't have to be perfect. Gryph (TMG) and others have done excellent restorations with basic equipment, and are helpful with good advice.  Café's are done seeking uniqueness but most follow the same route. I find the slab seats weird and the combination of c lip on bars chunky dirt tyres bewildering and the tank angle rarely look right. Twins and singles would be an easier and better choice. It is your choice but once chopped it is hard if not impossible to reverse your decision. And I have owned a café racer (69 BSA Lightning) but fortunately the frame had not been chopped and it came with the stock parts, and after one long trip it was converted back to standard except for the megas which I kept.
Regards Martin.
Title: Re: K100RS
Post by: Laitch on July 04, 2020, 06:30:01 PM
But it can’t live in the condition it’s in...
If you haven't already, resect that carbuncle on the tail cowl and then see how you feel about it. It can't be appreciated until you're low-flying on a motorway.

If I thought you could come up with something as streamlined yet practically-built and stylish as this one (http://www.motobrick.com/index.php/topic,11758.msg114894.html#msg114894), instead of just another angular, road grime-slinging, noise-making goulash of aftermarket parts, I believe my vote in favor of a remodeling would be available for purchase.  112350
Title: Re: K100RS
Post by: Martin on July 04, 2020, 07:03:00 PM
I just did a count on Gumtree, OZ's version of Craigs List. There were five café/scrambler K100's to three stock ones. So stock ones are more unique. However there are more chopped ones even if you don't actually see them on the road. However I have yet to search dumpster and graffiti riddled laneways. I'll now keep an eye out. 112350
Regards Martin.
Title: Re: K100RS
Post by: Vento3600 on July 04, 2020, 07:53:56 PM
If you haven't already, resect that carbuncle on the tail cowl and then see how you feel about it. It can't be appreciated until you're low-flying on a motorway.

If I thought you could come up with something as streamlined yet practically-built and stylish as this one (http://www.motobrick.com/index.php/topic,11758.msg114894.html#msg114894), instead of just another angular, road grime-slinging, noise-making goulash of aftermarket parts, I believe my vote in favor of a remodeling would be available for purchase.  112350

This is what I was thinking...
Title: Re: K100RS
Post by: 850Commando on July 04, 2020, 08:05:02 PM
That looks cool..  I vote for the cafe racer -  It's never going to be light but getting rid of the stock fairing will help a bit.. I don't like the look of these bikes as standard (and yours is a particularly unpleasant colour scheme :). so get out the angle grinder... I'd keep the ABS if it's working - The pumps add to the idiosyncratic look and it could be useful..
Title: Re: K100RS
Post by: Laitch on July 04, 2020, 08:12:29 PM
This is what I was thinking...
Same ole same ole on Hula Hoops.  :laughing4-giggles:
Title: Re: K100RS
Post by: daveson on July 04, 2020, 08:51:18 PM
In the "Project classic motobrick" section is a thread "how to monster a brick,  instead of cafe it" You could have the only monstered brick in the UK,  with probably only two in the whole world.
Title: Re: K100RS
Post by: Laitch on July 04, 2020, 09:57:43 PM
Just joined and thought I’d ask a quick question...
The question was quick, certainly. It might just be time to break out the Sawzall, angle grinder and checkbook then throw caution to the wind; otherwise, you can always move on over to Project Classic Motobricks and start building a paint booth.
Title: Re: K100RS
Post by: Vento3600 on July 04, 2020, 10:09:21 PM
Same ole same ole on Hula Hoops.  :laughing4-giggles:

Ha I take your point...to be honest I saw a pic of a cafe and said yep.  I’ll have a go (I’m probably going to get a bit of grief for my next comment)...I was kinda of thinking about doing a similar color scheme to my GS - blue frame with blue infill on the knee section and RS instead of GS...oh and rewiring the bike for new clocks etc etc.  Plus I needed a 30 year old bike for classic insurance, so far so good (depending how you feel about GSs)

I was all set...been picking out parts, looking at wiring diagrams...then that bike came up for the same price as a bad example and I was like hey why not, relatively decent base. 

If it was really bad I’d have done it by now but it’s so close...I showed it to a guy who lives near me and at first he was all don’t do that...but the more he looked at it he changed his mind.
Title: Re: K100RS
Post by: Vento3600 on July 04, 2020, 10:13:10 PM
Yeah I thought I was going mad so I thought asking you guys would help, hence posting it in this and not classics...sleep on it I guess see how I feel tomorrow.
Title: Re: K100RS
Post by: Martin on July 04, 2020, 10:17:47 PM
Riding it for a while in stock form may help with a decision either way. They are a prodigious mile muncher.
Regards Martin.
Title: Re: K100RS
Post by: Vento3600 on July 04, 2020, 10:26:34 PM
Riding it for a while in stock form may help with a decision either way. They are a prodigious mile muncher.
Regards Martin.

Yeah I’ll give it a go, like Laitch says might need a spray booth  :laughing4-giggles:
Title: Re: K100RS
Post by: Filmcamera on July 05, 2020, 12:15:59 AM
I would sell it to some one who appreciates a SE K100 RS, probably the most collectable K out there after the K1 and use the money to buy almost any other K if you want a cafe racer (my vote would be for a 89 K 100 RT but that is just me)
Title: Re: K100RS
Post by: Laitch on July 05, 2020, 12:43:29 AM
Look, Vento; it's your moto!
https://www.youtube.com/watch?v=klfk1xE_xAE (https://www.youtube.com/watch?v=klfk1xE_xAE)
Title: Re: K100RS
Post by: The Mighty Gryphon on July 05, 2020, 01:02:07 PM
This is what I was thinking...

Interesting; no visible intake system, battery, ECU or stands.  I wonder what else the builder eliminated.  I guess they just truck it around for photos.
Title: Re: K100RS
Post by: Vento3600 on July 05, 2020, 02:45:31 PM
What if it look more like this?

This is what I’m aiming for just a blue and white scheme.

Maybe straighten up the tank line too.
Title: Re: K100RS
Post by: Martin on July 05, 2020, 04:14:09 PM
Reality it's a dry weather, short distance bike only, if it's ridden at all. No mudguards, seat padding virtually non existent, c lip on bars (back killer). It is a project bike that will be ridden to the local café at the most. If they are finished they don't seem to keep them for long. Most don't get finished, a few mates and I over the last 20 years have sourced parts off these projects never to see them again. I've listened to their plans to create a unique one off, but it doesn't seem to eventuate. Maybe you have different plans for yours and it's going to be finished and ridden and kept for more than twelve months. Good luck which ever way you go.
Regards Martin.
Title: Re: K100RS
Post by: Vento3600 on July 06, 2020, 10:17:08 AM
Reality it's a dry weather, short distance bike only, if it's ridden at all. No mudguards, seat padding virtually non existent, c lip on bars (back killer). It is a project bike that will be ridden to the local café at the most. If they are finished they don't seem to keep them for long. Most don't get finished, a few mates and I over the last 20 years have sourced parts off these projects never to see them again. I've listened to their plans to create a unique one off, but it doesn't seem to eventuate. Maybe you have different plans for yours and it's going to be finished and ridden and kept for more than twelve months. Good luck which ever way you go.
Regards Martin.

I think you’ve hit the nail on the head there Martin.  Appreciate that it won’t be for touring and yes if it were done I would be happy to have a bike that I built in the garage for the rest of my life...I’ve got a CBR that is like the day it came out of the factory in there too and has been for the last 20 years.

I think I’m going to strip it down...easy now everyone...and see where it goes.  As I see it, as long as I don’t chop the frame it can always be returned to stock.  That said the plastics are in a shocking state (again you can’t see it on the pics but it really isn’t good).  This way I can do bits and see where it takes me down the line. 

Whatever happens stuff needs doing; for example the paint is coming off the front wheel; so might as well make a start.
Title: Re: K100RS
Post by: alabrew on July 09, 2020, 01:09:02 PM
I suggest stripping her down and cleaning her up, like you would do if you were to convert it, but rebuilding her as a Standard w/o a fairing and riding that around for a while.
Gives you the opportunity to do something special with the headlight (maybe dual?).
You could change out the seat to one of the plank type and see how you like that.
I would recommend against messing with the electronics, too many long thread about how to get those systems to work.

I'm on my RS today. A WONDERFUL motorcycle. The 4 valve motor is soooo smooth and powerful.
I jumped on the Interstate on the way in and rush hour traffic was running 90+, no problem on the RS, and then I shifted into 5th... :laughing1: