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.

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

Shift fork should have a cylinder that lets it follow a groove in the shifting mechanism.Looks like the plastic never got in there during the mold process, so the model doesn't shift properly.Well engineered but poor quality. Trying to get a replacement part.Update - Seller sent part immediately, good service.

The best engine model I have ever purchased. All parts are a perfect fit and realism is super great. Top notch assembly book is 1/2 inches thick and also contains the BMW history. Very well done.

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.

I've had BMW bikes with boxer motors since 1975, including the R90, and am very familiar with the engines and transmissions. This model is very realistic, inside and out, and is actually is as good as it looks online; it did not disappoint. Very well made, great precision. Everything fits. The transmission even shifts through all five gears. I put mine together in three evenings. It even comes with a very nice coffee table book about the history of the BMW bikes, and the assembly instructions are also in this book. The only tool you need to provide is a pair of nippers (I used a sharp pair of flush diagonal cutters, which worked well). The kit includes a small Philips screw driver, which did the job nicely. Everything is held together with small screws of one size. No glue required.

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.