BMW R/90-S Flat Twin Engine Model Kit with Collector's Manual

The quality and precision of the molded pieces was a pleasant surprise. I didn’t have any issues with assembly, the pieces fit together perfectly. The quality of the instructions reminded me of the factory manuals I use to maintain my own BMW R90S. The whole assembly will take about 3 to 4 hours at a comfortable pace and few breaks. The book included was filled with interesting facts about the history of the boxer engine and the R90S. Being an owner of an R90S I was particularly drawn to this model because of the advertised accuracy. The engine housing and gearbox are see through and you can see the relationship between all the internal components. The ‘spark plugs’ light up or fire in the correct timing. There is even an alignment tool that ensures that the timing belt is installed with the pistons and flywheel in the correct positions so that the spark plug fires when the piston is in the right position. To top it all off, the gearbox actually shifts between gears including neutral! I would recommend this to anyone regardless of your skill level. The most difficult aspect of this project is removing the waste plastic where it’s attached to the mold remnants. I’d advise a pair of electrical wire snips that cuts all the way to the tip to cut parts free then trim them with a razor utility knife. The plastic is too thick to cut safely with just a utility knife. Be careful not to get fingerprints on the inside of the clear plastic. These can’t be removed once assembled. I can go on and on praising this product, in summary this is an extremely well designed, precision, functioning model that does an excellent job exhibiting the internal relationship between the moving components of a boxer engine and transmission.

Met or exceeded my expectations for quality, ease, and beauty.Quality - Mostly great. No missing parts. Only three small fit issues. (1) one gear needed to have its center hole bored out. Not a big deal, took two minutes with a hand drill. (2) one mounting tab for one valve rocker was bent too tight, keeping the valve from closing. I put that head on the non-display side of the engine. (3) The gearbox shifting action is iffy. Lots of thin plastic parts with loose fit. Be deliberate but careful and it mostly works.Ease - Instructions were clear and detailed. Great diagrams, good pointers for routing, alignment, and sprue trimming.Beauty - All parts have fantastic surface quality. The chrome exhaust really shines, all the translucent panels are clear to see through and don't distort things.Final note - It doesn't have a clutch.

I bought this model last Christmas as a joint project to build with my grandson. Well we just got around to start building it the end of April, and as we went thru all the parts I noticed 3 tiny little transmission springs were missing. Being I bought it over 6 months ago I thought I was out of luck. By chance I sent an email to the parent company in Germany on a Sunday and got an instant email back and 4 days later the parts were in my mailbox! That's great customer service! The model is very well made as well.

This was great fun to assemble, and gave me insight into how my own BMW motorcycle engine functions - and allows better understanding when discussing things with the shop guys. Clear instructions, The one part I had a problem with (the toothed rubber belt was old/stiff) was quickly replaced by the seller, and then ran well. Can be a bit fiddly if you fail to pare off the little extra plastic holding some parts to the plastic molding frame. Make each part look smooth & "pretty" and all will go well!

The media could not be loaded. So much fun putting this together. The book that comes with it is gorgeous, and the instructions are perfectly clear. As a long time BMW R65 rider putting this motor together was a real joy, and the fact that it runs, with working gearbox, is just insane. So fun, took about 2 hours taking my time.

This would be a nice kit, but I am missing the two 68mm by 0.018inch flattened shafts to rotate the gears. Franzis website does not allow emails and an obvious show of not wanting to reply to customers. Do not waste your time spending a couple hours of build time ( with your kid) to only find missing parts and no easy means to obtain them. No customer service. what a waste.

What a great build! Very well made, no missing parts, all mechanical parts worked beautifully, and all part were perfect fits! Really loved how good the accurate the transmission works.Highly recommend this build. My only complaint is I finished it too quick for someone who loves the build

I'm bummed. Quality kit. Instructions shows a plastic bag with 3 wire springs for the transmission build. Only got two. Book shows not contact info. Struck out on Google. Apparently Amazon Customer service support doesn't support this product. Maybe I'm doing something wrong in my research. Either way, I'm missing a spring and I'm dead in the water.UPDATE...got email address from the Q&A section. Spring is on it's way. YA HOO.UPDATE 2...got the spring and extras. Found out I was missing 3 other prices ( MY FAULT). Got them sent to me. All completed and working. Great. Only issue was short wire which I had to extend. I'm sure you've all read about this already. Big THANKS to Kory for getting me the extra parts. Fun well made kit.