Don’t Ride a BMW R80 Without Siebenrock // Siebenrock Oil Pan Extender // BMW R80 Custom Build EP7

[@flobeeonekinobee2353]

Ive had a 79 R45 for 34 years i bought it for £75 as a none runner, it had an exhaust thread repaired but hadn't been reassembled, it was stuffed in the back of a carport with blue paint poured over the tank, i recommissioned it into a runner for £200 but it was so slow i decided to put a R100 engine in it , well that livened her up! I've done 300,000 miles on her, been to dozens of bike rallies, toured the alps , had numerous crashes, what a brilliant motorbike, a lifetime companion, she looks like a pile of junk but everything works, I'll never sell her

[@kris2435]

Just found this channel. Great content. But. I want more ….

[@montmoto]

Welcome aboard! More coming.

[@Battlehammer333]

@@montmoto :(

[@BFitz1976]

Irish guy in Cork just about to guy an R100. Great content 👍😊

[@davidwarren9204]

I have one of these (not a Seibenrock but the same basic doohickey) on my R100R. It's great - you can fit more oil, which is a plus and helps cool the bike. I also added a horizontal baffle (I can't remember the part number etc, sorry), which was recommended to me as a way to reduce the oil sloshing around in the more 'cavernous' sump and allowing air into the oil intake... Can't say if it makes any difference, but so far (10 years or so since rebuild) the engine is running perfectly...

[@montmoto]

Thanks for sharing. Sounds pretty cool. And glad it’s lasted you 10 years since the rebuild. Can’t really beat that. 😀

[@duncanmacpherson2013]

It is a good idea to lockwire the bolts that hold on the oil pick-up. If the oil pick-up drops off then your engine will be sucking up air even though you have a sump full of oil with catastrophic consequences. I like the look of your oil pan extender but I simply used an '81 spec sump on my R90/6 instead which also gives increased oil capacity. I did have to modify the centre stand to clear it though

[@montmoto]

Sounds like a sweet way to get extra oil without paying a lot. Good idea. Thanks for sharing.

[@Donmanolo.2625]

Bear in mind that one of the oil pan screws is a little shorter than the others and it's the one that goes under the oil filter tube....it's kind of important as it's possible to seriously mess up your engine if you don't notice...

[@KimMoonbmwmoonie]

Nice video! I'm getting ready to put the seibenrock 1000cc up grade on mine and a larger oil pan..😊

[@montmoto]

It’s going to be epic. Take pics!!!

[@KimMoonbmwmoonie]

@@montmoto i opted not to add the larger oil pan. I need to move my center stand apparently and I'm not overly sold on .5 liters making a huge difference. I did remove the pan and clean everything before running any oil through the new pistons. I got them installed yesterday. Now on to rebuilding the carbs. Thanks again for the video.

[@jochenwagner5170]

Hey guy. Very good station- I love it. Well done and spoken. I put the kit into my R45….. Phantastic, new bike with good power. I can tell everybody- this is a very good invest. Much greets from Germany! DUDE II🐍

[@montmoto]

Thanks for the kind support Jochen and glad to hear the Siebenrock worked out well for your R45 build. I’ve got plenty more content in the works so stay tuned 😀🤙🏻

[@robpinter5431]

Yes the Seibenrock kit is well worth for bikes that no longer have OEM parts available especially old air heads, also you should get the heads reconditioned.

[@montmoto]

Heads are already done. Will do a video on them. 👍🏻😊👍🏻

[@shanepeek5328]

i installed one on my R100Rt mono , and it gave me nothing but problems with oil leaking , even though i tried numerous fresh gaskets and correct torques , checked its level on a piece of glass and it wasn't true , ended up removing it , had no problems running without a oil cooler due to there no longer being a fairing so engine is truly air cooled , other than that i purchased another seibenrock product , piston and barrel kit and that is perfect , maybe i just got a dodgy sump extender , but its a lot of hassle , keep taking it on and off checking for leaks etc

[@59jaguar]

Did a similar build restoration with a r90 off of eBay . Took 2 yrs and lots of $$$. Curious to know how much of a difference the power kit makes? Hp ? Good video

[@endo9913]

Excellent video Marcus! I’m new to your channel. I liked the R Ninety T but for me it lacked something so I’m in learning-mode to see what can be achieved using an older airhead bmw. Nicely pitched commentary and excellently lit photography. I realise I’m a bit behind so looking forward to catching up!

[@montmoto]

Thanks Endo. Super encouraging. Starting up again soon.

[@endo9913]

@@montmoto Looking forward to that Marcus!

[@tatankacleary]

Love the videos …. But what happened? Where’s the rest?

[@montmoto]

They’re filmed. Just need to find time to edit them. Sorry for the delay.

[@christopherheeney4431]

Too bad you stopped making these videos. They were super helpful. 😢

[@montmoto]

Thanks for the encouragement Christopher. I’m thinking of starting back up again.

[@tyronealfonso]

@@montmoto Please do. Love your chill and friendly but no-nonsense style.

[@kaikruger1176]

Hey, great videos! Do you plan to go on with them?

[@montmoto]

I do. I’m sorry it’s taking so long.

[@philipjackson5818]

Nice pice of gear, but I have a 1978 R80/7, 54,000 miles on the clock and the hone marks on the bores are still there, its mechanically in an amazing condition, the ony reason I pulled the cylinders off was to replace the push rod tube seals, am leaving the engine stock. It will more than likly out live my F800gs.

[@montmoto]

Sounds like a great bike. Have always considered getting a F800GS. The F850GS is pretty epic too.

[@toddtonis]

Did your centerstand work with the Siebenrock oil pan extender? I've heard that some bikes will have some clearance issues.

[@montmoto]

Haven’t got that far yet. Put the build on hold but starting up again soon.

[@rodrigopaz9343]

Do you get a new dipstick with the extension? If you only add .75 liter to the total extra volume of the extension (1.3 l), how do you measure it?

[@AlcoHolix]

where is the pt2 for the engine build?

[@montmoto]

I keep asking myself the same thing. I need time to edit. Kids and work.

[@igsaanwilliams2048]

How much extra oil did you put in? The website says an extra 1.3 litre can be used. But when you get the extender, the inside leaflet says 0.75l extra oil. The difference is quite big

[@davidwarren9204]

I recall that the extender itself has an internal volume of 1.3(?)L, but that you don't need to add a full 1.3L to the bike. Rather, you add about half of that amount(ie the 0.75L) , giving you more oil volume AND more crankcase volume (ie the air above the oil, in the top of the engine). The increased crankcase volume (which gets compressed and decompressed with every stroke of the engine) results in a lower pressure differential, which reduces heat, parasitic drag on the engine, and blow-by from the breather vent. At least that's the theory :)

[@heiderosch]

Hello! Thank you for share this very usefull info and videos. I have a BMW R80 1985 and I want change the original shock abosorber for Öhlins S46DR1, do you know if that model work well for this type of motorcycle? Any info or recommendation about it I really appreciate! 🫶🏻 Heide, from Chile

[@alexandervankerkhoven9609]

where is the rest of the build? :)

[@montmoto]

Working on it. Sorry it’s taking so long

[@hamel_g5117]

Do you not need to change the cam with these?

[@zacharylemon3503]

Where'd you go?

[@montmoto]

Sorry buddy. Life got busy. Planning to start up the video making machine again next week.

[@Hansengineering]

Siebenrock is 'seven skirt' tho?

[@kris2435]

How’s the build coming along?

[@montmoto]

Slowly. I need to find more time for this.

[@johneastman1905]

This fellow may be a skilled mechanic … but his decision to butcher that fine old bike shits !

[@duncanmacpherson2013]

Agreed

[@allwinds3786]

So there goes another classic mechine and here's another abortion 😢