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Monster 937 interchangeable parts

29K views 68 replies 18 participants last post by  batemat16  
#1 · (Edited)
Hi all,

I'm a new owner of the 2021 Monster 937. It seems that with the loss of the Trellis frame there is also the loss of the wide aftermarket support (or at least the aftermarket is taking its sweet time developing new products for this bike). This has lead me to search for parts from the older 821 which might also be compatible with this new Monster. Looking through part numbers, I've identified the following parts which may potentially be a direct or close to direct swap between the 821 and 937:

Front mudguard: The official carbon mudguard from Ducati for the 797/821/1200 and 937 have the same part number (96980991A). This would indicate that any aftermarket fenders made for the 797/821/1200 would also be a perfect fit for the 937.

Front wheel: Looking at page 152 of the parts diagram for the M937 and page 126 of the parts diagram for the M821 shows that the front wheels of the 821 and 937 may be interchangeable. The front wheel spindle, left/right spacers, bearings are all the same. The wheel inner spacer is has a slightly different part number (71413321A vs 71413241AA ), but I believe this difference doesn't matter too much since the fork spacing is identical (identical part numbers for front mudguard), and all spacers and spindles are identical as well. Likely a direct swap but others are free to weigh in on this down below as well.

Rear wheel: Looking at page 156 of the parts diagram for the M937 and page 126 of the parts diagram for the M821 shows identical sprocket mounting assemblies between the M821 and M937 (16022491A). Unlike the front wheels however, the bearings have different part numbers, and the part numbers for the inner spacer and various other spacers are different. Interestingly enough, page 119 of the parts diagram for the M797 shows the same inner spacer/bearing part numbers, but the part numbers for the sprocket mounting components are different. It's not clear that any combination of rear wheel parts from older monsters would fit on the 937 without testing the parts.

Rear shock: Looking at page 137 of the parts diagram for the M937 and page 135 of the parts diagram for the M821 shows that the rear shock might be interchangeable between the M821 and M937. The two bikes have identical mounting hardware for their rear shock absorbers (77915041A). The shocks are also visually similar in the diagrams, with the main difference being the 'stepped' preload adjustment on the 937 rear shock compared to the more traditional locknut design of the 821. Coupled with the fact that the two bikes have identical rear suspension travel and likely similar swingarm geometries (821 vs 937), it's likely that shocks for the 821 such as the Ohlins DU506 can also be fitted to the 937 and offer identical/comparable gains in performance.

Rear plate holder: This is a long shot, but between pictures in the parts diagrams (p130 for m937 and p20 for m821) and various aftermarket tail tidies, it does look like the position and spacing of the mounting holes for the two bikes are similar. Whether they are identical or just visually similar wouldn't be possible to tell without parts in hand. Fortunately, there are already a few tail tidy options for the M937 from Evotech (unfortunately sold out as of writing) and R&G racing (also unavailable as of writing) so less of a need to take a gamble on this one.

Obviously I've searched these since I am interested in replacing these items on my bike. I'm curious to see if anybody else has looked into this and if so, what other parts might be interchangeable between these bikes. Any inputs about the items I've identified are welcome as well.
 
#5 ·
To be completely honest, none of the people who bought a M937 care about people like you who dislike it because of the move away from the Trellis frame. At $11,895 MSRP, the new M937 is also slightly less expensive than the outgoing 821 at $11,995. Price of official accessories from Ducati are also comparable and people with old and new Monsters alike will want to spend money on exhaust/wheel/shock/visual upgrades if they could. My purpose of starting this thread was to identify parts from previous Monsters which already exist due to the current lack of aftermarket support for this new model.

Ducati made an engineering decision to drop the trellis frame. This has resulted in the significant 40lb weight saving over the M821, service intervals comparable to Japanese bikes, and the ability to actually engage neutral on the first try. They also made a business decision to market it as a fun, utilitarian bike priced almost identically to the M821 and aimed at a new generation of riders like me who mostly live in urban areas and want something that can do it all and do not care about things like what a monster is "supposed" to be. Obviously, whether or not you choose to follow up and vote with your wallet to reflect Ducati's engineering and business decisions for the M937 depends on your own taste and financial situation, but for me it is perfect.

Holding on to heritage and building bikes that respect tradition is great and all, but it should not come at the expense of engineering progress. If what a bike "should" be is more important for you, then maybe I can suggest selling your Ducati and picking up a Harley instead.
 
#25 ·
Almost all cat delete pipes are not restrictive -- they are essentially a link pipe. On the other hand most catalytic converters are (some more than others). Even if the stock cat is only mildly restrictive, you will still benefit from a tune if you "remove" it.
 
#29 ·
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#43 ·
You guys think any aftermarket Slip on will work with the Mivv cat delete ?

Also would a cat delete make a tune be required ? Or recommended.

I haven’t seen a power commander for this bike so don’t know how we could even get a proper tune.
A tune would be a must and as for " any slip on", I feel as long as it's specific to the monster 937 it would fit