1975 BMW R75/6 Install Siebenrock 1000cc Upgrade Kit

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This shows how to install a Siebenrock 1000cc upgrade kit on a 1975 750cc engine that has over 200,000 miles. The kit was supplied by Euro MotoElectrics (www.euromotoelectrics.com).

Пікірлер: 78

@abrahamlevi3556 4 күн бұрын

What an excellent video! One remark though: in some countries, however, this kind of conversion is strictly illegal as the only displacement allowed is the one that appears on the license. Although such infringement is undetectable during inspection, if God forbids there is an accident and the infringement is discovered, the insurance policy is no longer valid. In certain countries any modification that deviates from the license is strictly forbidden, so check beforehand.

@charleshof6394 11 ай бұрын

Thanks for the very nice documentation on not just how, but also the why and reasoning behind careful teardown, also assembly. The video and audio were very good.

@BrooksAirheadGarage 11 ай бұрын

Thank you Charles.

@longfellow5276 7 ай бұрын

I,ve had 5 Beemers in the last 40 years and the 75/6 was definately my fav. Great bike.😂

@GanjaBaron 2 ай бұрын

Very nice! I'm replacing the pushrod tube seals on my R100R and this video covers that too.

@jtreg 11 ай бұрын

lovely. I would like that for my R80RT, great job Branden!

@Markonthisworld 7 ай бұрын

Extremely comprehensive explanation, great to see you working with you son - I do similar now and my father helped me

@BrooksAirheadGarage 7 ай бұрын

Mark, Indeed, Branden is getting to be a knowledgeable airhead owner, maintainer and rebuilder. 🙂

@Aclan 11 ай бұрын

You're the best.By the help of your videos now I can completely tear down my 95 R80 GS and than fixed it and run! Thank you :)

@BrooksAirheadGarage 11 ай бұрын

Thank you. I'm pleased this is helping you.

@davesmith61 5 ай бұрын

Really good clear instructional video, thinking of getting an R75 & would probably go down this route if I do.

@richardlaker9722 5 ай бұрын

Good morning Dave . Thanks for your message concerning my R45 engine upgrade to a 860. I brought the R45 as an insurance right off not structural enjoyed locating all the damaged parts. The engine upgrade is completed not by me . I was going down that route it all makes sense when I read your message. I won’t be getting the bike on the until 1st April so it gives me plenty of time to sort out the paperwork. It will be interesting to see wot they put in the V5. It will always be a R45 because the frame + engine numbers are still the same and the frame is small and shorter than the other models. Yer it’s quite an upgrade should be interesting 🤔 thanks again for your advice on this matter very helpful. Won’t be too long before we see some milder biking weather.🏍👍

@bwr6678 2 ай бұрын

Apologies for the delay. The cost on the gasket is recommended by BMW. It may or may not help but it doesn’t help. An extra step that brings me a little peace of mind. I dumped the oil every 200 miles for 1000 miles during the break in. Sitting at nearly 5,000 miles on the new cylinders and no issues. Next step is to strap on our rebuilt 40mm carbs and matching heads to make it a nearly true R100

@michaelcrenshaw9199 11 ай бұрын

Excellent video. The Siebenrock instructions are pretty good. I installed a 1000cc kit to my R90/6 and it was a great upgrade. Im considering installing an 800cc kit to my R65.

@BrooksAirheadGarage 11 ай бұрын

That should add some punch to the R65.

@johannej3241 11 ай бұрын

@@BrooksAirheadGaragehi, I’m wondering if siebenrock has big bore kit for r60/2 like a 700 cc or 750cc? Thanks for the video and walking us through.👌

@BrooksAirheadGarage 11 ай бұрын

@@johannej3241 I don't know if they do. You can visit their web site and see.

@kevinschilling1368 11 ай бұрын

Excellent video (as always), thank you both,,,, great upgrade I'm sure,,,,,,something to ponder for my 1985 R80RT

@BrooksAirheadGarage 11 ай бұрын

Thank you Kevin. 🙂

@richardsalsman1069 11 ай бұрын

Timely, I am about to install a Siebenrock kit on my /7.

@BrooksAirheadGarage 11 ай бұрын

Best of success. It went smoothly for Branden.

@kenchan5624 11 ай бұрын

Excellent video very enjoyable very detailed thank you for both of you.keep up the great work.

@BrooksAirheadGarage 11 ай бұрын

Thanks Ken. 🙂

@christopherdopp8307 11 ай бұрын

Hi, I recommend copper anti seize, I used the aluminum version last time and it fuzed it all together and ruined the threads on the head. It was recommended that the compound be dissimilar to aluminum. Thanks for the video!

@BrooksAirheadGarage 11 ай бұрын

Hmmm ... I've never had that problem with the silver anti-seize.

@WildlifeMoto 11 ай бұрын

Fantastic video gentlemen. Thank you.

@BrooksAirheadGarage 11 ай бұрын

Thank you. 🙂

@vespasandengines 11 ай бұрын

Great video as always. Thanks Brook!!

@BrooksAirheadGarage 11 ай бұрын

You're welcome.

@andrewdavis6917 11 ай бұрын

Great job, looks like a good time to me

@BrooksAirheadGarage 11 ай бұрын

Thank you Andrew. 🙂

@daledahlman9629 10 ай бұрын

Thanks for the thorough explanation

@BrooksAirheadGarage 10 ай бұрын

You’re welcome Dale 😀

@loop1479 10 ай бұрын

No mention of gapping the rings. I take it Siebenrock take care of this for us? One of the things I like about Bee Ems, so simplistic to work on. Thanks for the video.

@ericwiltz6584 6 ай бұрын

First I wish you and your son a wonderful holiday and great 2024! GREAT VIDEO and hats off to using Three Bond is the only gasket sealant to use PERIOD, why not use grey? It also looks overkill to coat the gasket, (my opinion) You likely did this, but I always use a petroleum based degreaser on the inside of the cylinders and a white cloth to check for ANY residual, repeat the step until the white rag comes out white. Once clean, assembly lube immediately to the cylinder, just a thin coat, minimal. There is almost always residual material left by the hone even when cleaned by the factory. As for the assembly, nothing goes back together without using assembly lube.! Once you run this beauty, change the oil out to a synthetic called Trybodyne. It's pricey, but it's proven and you won't be sorry. Thank you for sharing this, Eric Harper, TX

@ericwiltz6584 6 ай бұрын

Oh, anti seize on the spark plug thread.

@jimmycrowell8854 8 ай бұрын

212,000 miles "might be time for a top end refresh" gotta love old BMW motorcycles thats impressive german engineering

@timlavance867 5 ай бұрын

For sure..I have 166,000 on my k75s runs perfectly..love it!!!

@bwr6678 2 ай бұрын

Well it had a top end at around 100k. Now that I put another 100k we felt it to be necessary.

@stephenkramme7063 11 ай бұрын

Any thoughts on why the otherwise modern and up to date kit still uses a two piece oil ring? This seems like following tradition and very "old school" though it does work. How about a video that measures the clearances of the original cylinders, pistons and rings?

@jeffshootsstuff 6 ай бұрын

What would you say to the people who are adamant that you should never use any silicone or any other goo/sealant on BMW airheads?

@BrooksAirheadGarage 6 ай бұрын

In the case of cylinders you have to use sealant to prevent oil leaks.

@trucktruck8016 9 ай бұрын

Sweet vid ,simple and to the point , looks an easy upgrade, though you didn't go into carb set up to suit the increased cc ?

@bwr6678 2 ай бұрын

Apologies for the delay. Increased the main jet one size is about it. Outside of that it was a standard carb balance per the bing book. Not much outside of that to run smooth. I’m at close to 5,000 miles since the upgrade and I have been very pleased. Stay tuned as soon we will be putting on 40mm carbs and matching heads to make it a nearly true R100

@YOGiGrills-zd3zo 5 ай бұрын

Really special video, love you’re doing this with your son too. My dad built us some lovely R80’s and now looking at this conversion. How does she ride now? Is it a dramatic improvement in power?

@BrooksAirheadGarage 5 ай бұрын

Branden says it has more punch now and he is happy with it. 🙂

@YOGiGrills-zd3zo 5 ай бұрын

@@BrooksAirheadGarage thanks for the reply! If you get the chance would love to see a video of it being ridden or running 🏍️🏍️

@bwr6678 2 ай бұрын

Sitting at about 5,000 miles on the new cylinders. Very happy with the performance upgrade.

@timhayes7359 4 ай бұрын

Yeah good, but I thought you would have mentioned or checked the lifters for wear , especially for a topend build.

@BrooksAirheadGarage 4 ай бұрын

They were perfect

@richardlaker9722 7 ай бұрын

Afternoon just wondering if you can help me. Ive just fitted my engine upgrade kit to my R45 very pleased. 👍 Question 1. Do I have to change the details on my V5 because the engine and frame numbers haven’t changed so it will always come up as a R45 . 2nd will I have to change the details on my insurance. Thanks looking forward to hearing any comments. Have a great Christmas. 🏍🎅🍺👍

@BrooksAirheadGarage 7 ай бұрын

Richard, I have no idea about the answer to your questions. However, it's not uncommon for someone to upgrade a "stock" vehicle with modifications. The registration is still tied to the original vehicle.

@davesmith61 5 ай бұрын

Hi Richard, yes you should let the DVLA know about the capacity increase, you need to send off your V5 & I'd be inclined to include a copy of the invoice for the kit & a covering letter explaining what you've done. Also you should really notify your insurers just to be on the safe side.

@loris199 11 ай бұрын

Awesome video! Makes me want to try to do the same on my R80GS (already have the 1000cc SR cylinders and pistons inside). Job seems not too trick. Do you recommend me to try even if i have close to 0 experience?

@BrooksAirheadGarage 11 ай бұрын

loris199, I think you can do the upgrade without large amounts of experience. I have documented installation of the top end on different bikes on my web site: brook.reams.me. You can look at them as well as this video. I also have posted other videos on installing the top ends, but for newer airheads that don't have the base gasket. That's the main difference with this 1975 R75/6.

@loris199 11 ай бұрын

@@BrooksAirheadGarage thank you so much for the feedback, i'll go for that...if you never try you never know Cheers from Italy and thank you again for your precious contents

@BrooksAirheadGarage 11 ай бұрын

Best of success 😃

@halukalpkaya7895 10 ай бұрын

1988 yılında polisten çıkma 1976 model R60/6 yı 94 mm silindir ve piston takarak 1000CC ye yükselttim. Komprosyon oranı aşırı yükseldi ve sürekli detenasyon yaptı. Orjinal silindir kapaklarını takarak sorunu çözdüm. Sonradan karbüratörleri de değiştirdim. Buna rağmen özellikle şehir içinde çok ısınıyordu. Max hızı 2 kişi ve çantalar ile 195 Km/saat yakıt tüketimi max yükle hızlı kullanımda 100Km/7Litre oldu. Frenler ön dahil kampana idi kesinlikle yeterli değildi. Siz komprosyon olayını nasıl çözdünüz? 63 yaşında Otomotiv teknik öğretmenim (yüksek okul) BMW nin bu serilerinde sabit strok 72 mm idi yaklaşık sanıyorum 74 94 mm arası silindir ölçüsü kullanarak hacim büyütmek ne kadar mantıklı bilemiyorum. BMW nin en muhteşem eseri 1962 1968 R60 serisidir. Özellikle R69 S 42 PS. Amerika için üretilenler değil. Orjinal ön takım beşik amortisörlü olanlar. Her yük yol ve fren durumuna göre kaster açısını sürekli değiştirerek mükemmel yol tutuş sağlar. R90S lerde fena değildir 67 PS Türkiye den selamlar.❤❤❤

@williamanderson4029 11 ай бұрын

So was there a noticeable difference in performance? did you rejet the carbs?

@BrooksAirheadGarage 11 ай бұрын

Branden said the acceleration was noticeably stronger on his 10 mile ride. Currently the jetting is not changed, but he will check the plugs to see if jetting changes are necessary.

@bwr6678 11 ай бұрын

Quite a noticeable difference. I have a bit better then 100 miles now and it definitely has more get up and go. The carburetors required larger (135 to 150) jets and opened the needles up by one notch

@assessor1276 11 ай бұрын

Nice work and as always, an informative video!

@loop1479 10 ай бұрын

@@bwr6678 Is yours a R75 conversion as well? Thanks

@bwr6678 10 ай бұрын

@@loop1479 yes I should have clarified. I’m Branden, that’s my motorcycle.

@MwenjeNgambi-hp7nw 7 ай бұрын

hi l like this do you sell second hand parts

@BrooksAirheadGarage 7 ай бұрын

No 😊

@user-eq1yx4pi1d 6 ай бұрын

Have you got a later model gearbox on this bike? Curious to know how the swap went? Also is that an extended sump? cheers!

@BrooksAirheadGarage 6 ай бұрын

When I had the transmission rebuilt by Tom Cutter, he replaced the case with a used newer one since one of the clutch cable tabs was broken. It does have a deep oil pan that I installed in the early 1980's.

@user-eq1yx4pi1d 6 ай бұрын

thanks for the reply. Seems like you really have the best of both worlds now - older styling and 'modern' performance @@BrooksAirheadGarage

@user-eq1yx4pi1d 6 ай бұрын

A question about the siebenrock swap - did you base gaskets have clearance for the o-rings to seal against the engine hosing or did they seal against the base gasket ? I am at this stage myself with the same kit for my R75/6 but I have some base gaskets from earlier. They look like the same ones in the kit that siebenrock supplies but I can't be sure. thanks!

@BrooksAirheadGarage 6 ай бұрын

The orings seal against the cylinder base and the hole at the top push rod in the engine block.

@user-eq1yx4pi1d 6 ай бұрын

right so the hole in the base gasket was large enough for the o-ring to pass through and seal against the engine block? sounds like I might have the wrong ones @@BrooksAirheadGarage