BMW R45 R65 R80 and R100 Airhead Power Upgrade from Seibenrock 

This bloke makes watching paint dry exciting!

I thought you said you were going to be speaking about it in great detail? You managed to get through the entire video without any detail whatsoever! Enjoyed the film though, glad you're happy and the condition of the R45 is a credit to you.

These old airheads are indeed still fun to ride. I have a 79 R100RS and each time I ride it, it still amazes me how good it performs. Bought it two years ago, won’t ever sell it. My wife will probably divorce me I do.

When my dad is still alive, we had a shop that fixes and restores old bmw's 1968 and older, we didn't bother with the modern airheads, but we had a chance to have an R65, boy i loved it it's quick and nimbe enough feels like a dirt bike, that's where i found out why everyone is nut about the GS 😂

On Power, I had an R65 for about 3 years. I ran with others who mostly had R100's but didn't lag behind much as it got up to 110 mph (indicated) very quickly the few times there was a straight road and no police. After that it was a series of R100RS's which I took to top speed a few times but mostly only used the power to pass. I noticed it stumbled right around 100 mph. On having to do a top end I asked to put in dual plugs and a few other mods but nothing which would hurt the engine's reliability. With that I could get it up to 125 very smoothly from it's stumbling to 120 beforehand. Now I have an F800 which is a wonderful performer but seldom bring it above 80 and have never taken it to full speed. None the less it's always satisfying to know your machine is running at it's peak.

Beautiful bike, great video!

Awesome video. Great presentation

Great video I enjoyed this, I like your style :)

I’ve done it too Last winter. This Bike (R45 with the kit) from now on is my obsession. Especially: it reminds me extremely to my 750 Norton Commando, leaving a village, 5th gear- inhalating the throttle needles higher….

I am still here, and you are doing well. Take care, ride safe.

I bet the bike goes absolutely fantastic and I agree that the short wheelbase bikes are a pleasure to ride. I regretted selling my R65 to a friend so bought a 78 R45 which I converted using pistons and barrels from a R65. Just returned from a 800 mile tour of Devon and Cornwall, fully loaded and it never missed a beat. I also have a R80/7 so didn’t really need to upgrade to an 860cc, oh and I’m a bit too tight to shell out the cash needed. 👍

nice looking bike. Beautiful country-side.

Great video! Nice one. Having ridden loads if Airheads over the years I'm hopefully about to actually buy my first. A wreck of a r75/5. If the deal comes off I'll have the restoration on my channel then it'll be used for a few trips away!

Now I want one but would settle for an R65👍

Great video! Siebenrock says that the asymmetrical camshaft is essential to order along with the power kit. Did you change the camshaft as well?

Did a similar upgrade on my wife's R65 about 30 years ago. But one thing led to another, ended up changing out the final drive, heads, carbs etc. I wish I could have found a wrecked R100 or R90 and used th parts from that. Could have saved me a lot of money.

I sold motorcycles for 10yrs. Ducs kiwi’s Suzuki Honda triumph and The multistrada is one of the most fun bikes I’ve ever ridden.

I clearly remember the Motorcycle News (newspaper) headline at the introduction of the R45 and R65 "Sluggish Snails"

Entertaining video, many thanks! As a returning biker I considered getting an R Ninety T but really don’t need the full capability it offers. Your R45 looks great and I was wondering if it may be too small for someone 6’ 1” ish?

I bought one ready converted and really like riding it - it feels like you're going faster than you actually are! One change I made is to fit an r65 final drive and speedo because like you I found it too revvy on the open road - it's 12% higher and fourth gear is now equivalent to my old fifth. Can I ask you if you find that if you open the throttle in say 4th gear at around 2800rpm it vibrates till 3000rpm and then pulls hard? I don't know if I am bogging it down and this is normal or if it is a tuning issue

Love the channel. I’ve just purchased a insurance right off not structural. All the work completed. I just received a new V5 just I’m going for the engine upgrade do you just get the engine capacity change on the V5 thanks again for the great video. 🏍👍

You may be interested in a story that illustrates the interchangeability of BMW parts. Many years ago prior to the whole GS craze that started with the R80GS a guy called a Lindsay Urqhart who was the Australian BMW manager built a bike and sidecar racing ace built a trail bike GS largely styled after the BMW ISDT bikes. It looked fabulous but the interesting point was, he used an R100 engine but with an R65 crank and shortened cylinder barrels. This gave about 800cc with a bore and stroke combination not seen on any BMW at the time. I read a review of the machine which was mainly positive. The bike had Maico twin shock suspension and really did look great. Sadly it’s current whereabouts are unknown. Many manufacturers don’t reinvent the wheel with every model. Design engineers use many design solutions across many models and years. Take a look at 70s to 90s gear selector ratchets which were largely the same across both road, trail and mx bikes. Harley Davidson does the same which allowed me to use front brake and suspension parts from bikes as late as 2010 on my 1978 machines, turning old bikes into well braked and safer pieces of equipment. Never sell a BMW is my advice as every time I get back on after a long lay off I am reminded of BMWs slogan from the 70s that read, ‘Sheer riding pleasure’. I have three and love them all.

Ahh, reminiscing about the days of riding down Long Causeway eh? :D

Morning just wondering how you got on changing your V5 details from a r45 to a r 83 can you please let me know. I’ve just ordered my up grade kit thanks love your channel. 🏍👍+ How long before you receive your updated V5 thanks again 🍰🥟🍔 yum😋

Today i finished the 860 rebuild !! I changed from Solo ATE Brake to Double Brembo Discs. Carb is a Bing 32 with a 145 mainjet. End gear ratio changed to 32/10. Runs like hell !!!!! Should have done this years before !!! No more hurting the engine with 6000 plus RPM just for passing a car or so.

Nice one. What about the carbs? do they need rejetting? ot just swap piston gasket and cylinder

I already have a r100 mono shock but for some reason now want a r65 too😂

Interested in what windscreen you have?!

Wonder what that increases power to ….60-70bhp maybe?

cool

Hi, thank you for the video. My name is Lutz living in Wuppertal (the city with the suspension train) / germany. I ride an R100GS PARIS DAKAR 1989 but searching for a smaller, lighter Airhead => so you showed me the perfect solution!!! Siebenrock is a well known german brand and Hans-Joachim Siebenrock is a technical engineer who founded in 1984 (when I was 20 years old) his company. You have a beautiful bike, I like the colour very much! Is the colour original? Where do you have this tiny little windscreen from? Best wishes, allways a safe ride and a happy christmas time >Lutz

Have you tried the 250R

subscribbled, could've not, yet, but could not :) ...

Good morning. I watched your video for another time, thanks a lot for the riding and beautiful landscape scenery imaginary reviews, my BMW does not work in the last 3 weeks exactly. Problem with spark fire between 2000 and 3800…. Crankshaft. Today I will make another try. I fixed everything controlled and new. Even checking the Carburetor. When Troubleshooting goes on, I will check the ‚Fliehkraftregler‘ She really reminds me of my Vampire Motorcycle Commando. I put in a Boyer Brandson Electric Ignition, problems gone, but many more output of power, american Cylinder Head and MK2 or Mikuni Single Carb. Life goes on- I dream about Scotland another time. Across England by Ferry. And the BMW (black Princess). Best regards.👩🏿‍🦳🐶

I'd love to get one, but in South Florida air cooled, is like riding an oven.

I thought an old grey windpasser was something else.

866cc is a good product upgrade … but this video … one can easily do without …

Morning many thanks for the information you sent me. Just wonder your thoughts 1. Because my r 45 was a insurance right off not structural it was stolen. It will need a mot to prove it’s road worthy I presume the new mot will still show the bike as a r45 because the engine and frame number are still the same. 2. When I come to insure the bike I tell them it’s a r45 with a engine upgrade. Just going for another coffee and maybe a 🧁 😋 and read all the information you sent me. Thanks again for your help on this matter looking forward to receiving my upgrade kit. Enjoy your channel very much. 🏍👍

Nice...but the cost eclipses the value of the bike. 🤔

Tell RU-vid that your videos aren't being watched anymore because of ads.

LOL. “Steinbrecken….” Cmon, I know you Brits say things like Toyotra and Mazdar, but Sieben-rock??? That’s easy!

Beware of Evil Highspeed Speed Wobble 😨

I put a R100 lump in my R45, goes like stink

😒 p̾r̾o̾m̾o̾s̾m̾

The r45 was a dog, the 65 was a peppy motor which had a nice whine, hans muth style lol

As an engineer, I regard your misleading video title as ‘clickbait’. Nothing about the upgrade, just you rambling about motorbiking.

R45 was a complete dog of a bike

and when they drive it is always a crap experience🤣🤣🤣🤣🤣🤣🤣 amazing!!!!

Just get an R65LS saves all the hassle