BMW K bikes (Bricks)


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Chris350

Chris350
active member
active member
Hi,

Tell me that I'm nuts here.

As part of a provincial inspection (Alberta, Canada) to get my bike registered in my province, my stock 85' K100 requires the heat shield to be attached to the exhaust.

The previous owner removed the heat shield at some point and ran the bike for years and years without. They also ground down the tabs completely flush. After this inspection I want to run the bike without the heat shield forever.

I've acquired a secondhand heat shield and want to temporarily attached it to the stock exhaust for the ride to the inspection (private motorbike shop), for the 20 minute inspection, and the ride home where I'll remove it. We don't have annual inspections or anything like that so it's probably 20 mins of riding and 20 minutes inspection.

I don't think a metal hose/band clamp or similar is going to pass.

Some options.

1. Buy all the OEM parts, clips, square nuts, etc and do it right.
  • Seems like a bit of work for taking it off afterwards, if done correctly I guess I'd probably keep the heat shield on
  • I do have access to a welder but I've never welded in my life, I understand the exhaust is SS and I believe that complicates welding even more


2. I have seen this: https://www.k100-forum.com/t1411-installing-a-bmw-muffler-repair-kit-p-n-95009000390
  • I'm not keen on drilling holes into the exhaust


3. JB high temp weld some bolt heads to the exhaust, add some nuts to add some distance up the bolt, place heat shield and then washer / acorn nut it down
  • Tell me if this is just dumb


4. Similar to 2 but with socket sex / sleeve bolts
  • Tell me if this is just dumb


Any other ideas?

Thanks

    

RS Rider

RS Rider
Gold member
Gold member
When are you having your inspection done?


__________________________________________________
1985 K100RS
    

Dai

Dai
Life time member
Life time member
(3) has possibilities. Do it, test it and if it works, take the heatshield off again. Within two minutes of the inspection shop put the heatshield back on. Remove for the ride home, then grind off the JB Weld and polish. That way it's only attached for the minimum of vibration time.

RS Rider may have a better idea because, IIRC, he's been through that cr@p.


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

MartinW

MartinW
Life time member
Life time member
You could pop rivet wide stainless steel cable ties to the shield then attach the shield to the muffler. Or alternatively drill hole in the S/S ties and use nutserts. As long as it is securely attached they should pass it. Many years ago I failed a RWC test when trying to register a trail bike  with a highish rear mudguard. The rules stated that a mudflap had to be fitted and had go past the centre of the wheel. I went back to work and attached a 30Cm long piece of reinforced rubber to the rear number plate.  The motor reg guy said it looked ridiculous and tried to fail it again. I argued that it fulfilled the requirement and the looks were irrelevant. He then argued that there was no way I was going to leave it on if he passed it. I countered with what  I did after it passed was not his concern. He called in an offsider and I argued my point again and begrudgingly they passed it. As soon as I got back to work as predicted it was removed.
Regards Martin.


__________________________________________________
1992 K75s
    

Laitch

Laitch
Life time member
Life time member
I agree with Dai's choice of #3. #1 will take experience or reliable connections in the trade to undertake. #2 seems a drastic measure to perform on a usable part. #4 seems too hardcore besides being somewhat painful, unsatisfying, and irrelevant to the goal.


__________________________________________________
1995 K75 90,000 miles
    

TacKler

TacKler
Life time member
Life time member
Other options are to buy, borrow, beg or steal* another exhaust system for the purpose of the test.  

*  Not really recommended.  Just being silly.


__________________________________________________
Red 1991 K75S
    

caveman

caveman
Life time member
Life time member
Attach some small flat stock steel to the shield that can be bent and clamped to the muffler similar to the heat shield on semi stacks.

    

Chris350

Chris350
active member
active member
RS Rider wrote:When are you having your inspection done?

No set date yet, haven't picked a shop or anything like that yet. I'm thinking as soon as Calgary roads are good enough, late spring / early summer. I think I have the bike near ready, I just need to get it up to speed to make sure nothing is hiding. I've had it idling in my garage and around the block once last October but it hasn't been above 10km/hr in over a decade.

    

Chris350

Chris350
active member
active member
caveman wrote:Attach some small flat stock steel to the shield that can be bent and clamped to the muffler similar to the heat shield on semi stacks.

I like this thought caveman. It would look pretty decent as the wrap would go under and behind the muffler. I'm in the process of trying number 3 on my list. If (or maybe when haha) the JB weld just ain't doing it I'll take a harder look into this. Appreciate the suggestion. Thanks.

    

Chris350

Chris350
active member
active member
TacKler wrote:Other options are to buy, borrow, beg or steal* another exhaust system for the purpose of the test.  

*  Not really recommended.  Just being silly.

This is the best option, buy someone a dozen of their favourite beer and borrow it for inspection day.

    

Chris350

Chris350
active member
active member
Dai wrote:(3) has possibilities. Do it, test it and if it works, take the heatshield off again. Within two minutes of the inspection shop put the heatshield back on. Remove for the ride home, then grind off the JB Weld and polish. That way it's only attached for the minimum of vibration time.

RS Rider may have a better idea because, IIRC, he's been through that cr@p.

#3 is in progress. We'll see how it turns out. Good idea to minimize the time on the bike.

I took some assembly pictures. I'll update with results.

    

Chris350

Chris350
active member
active member
MartinW wrote:You could pop rivet wide stainless steel cable ties to the shield then attach the shield to the muffler. Or alternatively drill hole in the S/S ties and use nutserts. As long as it is securely attached they should pass it. Many years ago I failed a RWC test when trying to register a trail bike  with a highish rear mudguard. The rules stated that a mudflap had to be fitted and had go past the centre of the wheel. I went back to work and attached a 30Cm long piece of reinforced rubber to the rear number plate.  The motor reg guy said it looked ridiculous and tried to fail it again. I argued that it fulfilled the requirement and the looks were irrelevant. He then argued that there was no way I was going to leave it on if he passed it. I countered with what  I did after it passed was not his concern. He called in an offsider and I argued my point again and begrudgingly they passed it. As soon as I got back to work as predicted it was removed.
Regards Martin.

Yes, good idea Martin thanks. I'm trying #3 at the moment, JB is setting up so we'll see how it goes.

What I should do is pick a shop and bring the muffler in and explain to them something like your ss cable ties idea and see what they say.

    

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Another option may be to attach your heat shield with muffler wrap like the cafe guys put on their exhaust pipes.  Takes about 5 minutes to put it on, and the same to take it off.  No welding or metalwork required.

Tell the inspector you are using it to make the bike a little quieter because the heat shield was rattling.  Might even score you a couple extra points.  Leave a little heat shield showing at each end so they know it's there.


__________________________________________________
Present: 1991 K100RS "Moby Brick Too"
 
Past:
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

14Back to top Go down   OEM Heat Shield Temporary Attach to OEM Exhaust For Provincial Inspection Empty Heat shield Fri Feb 16, 2024 3:54 am

daveyson

daveyson
Life time member
Life time member
I would probably just use these nuts and bolts, simple.

OEM Heat Shield Temporary Attach to OEM Exhaust For Provincial Inspection Img_2116

With so many plastic parts on cars now, you see these a lot, for example when something is bolted to a plastic bumper. I use these in lots of different applications.

Screw them on, screw them off, in a jiffy.


__________________________________________________
11/1985 bmw k100rt (late model)  Vin. 0090567
 ~120,000 km
    

Dai

Dai
Life time member
Life time member
Original post states that the tabs/cages have been ground off, otherwise a very good idea.


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

16Back to top Go down   OEM Heat Shield Temporary Attach to OEM Exhaust For Provincial Inspection Empty Heat shield Fri Feb 16, 2024 4:42 pm

daveyson

daveyson
Life time member
Life time member
Ah ha missed that detail. Now I'm liking point sevens idea of muffler wrap, I thought it was an alternative to a heat shield.

Something else to consider, as ridiculous as it sounds, is silicone to stick the nuts on. I've used that in all sorts of strange situations. I think of high temperature JB weld as just high temperature silicone with some additives. Silicone would be easier to cut off.

I think metal band clamps should pass, you could ask, it might help to point out that it's stainless steel, and have one on the narrow part. Sometimes I've got a pass by going to a different rego branch.


__________________________________________________
11/1985 bmw k100rt (late model)  Vin. 0090567
 ~120,000 km
    

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