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The default spring rate seems to be 8.3(160lb rider range) according to Belissimoto back in 2018 when I did my Andreani cartridges. That was too soft for me so they sent 9.3(260lb rider range). The 8.3 were definitely too soft for me. The 9.3 are spot on but now I'm loosing weight so I might...

In my house the family says "your motorcycle is MOOO-ing dad".

It's the gas tank breather. Open the gas cap for a second. It's common on these bikes.

Do you have a tuner on the bike? If so then it could be as simple as the power wire that powers the tuner. It's located behind the right rearset usually and is subject to excessive stress. This is also where the neutral switch wiring is(which was my issue that I just fixed yesterday). Another...

It's like this. Lighter flywheel makes the bike rev quicker and steer quicker. The down side is that the bike is very sensitive to throttle input. https://www.bellissimoto.com/parts/engine/lightweight-flywheels/kbike-lightweight-800g-steel-flywheel-for-1999-fuel-injected-ducati-s-1

A manual impact is exactly what I would recommend

285mm is correct for the base motard 821. I have one in hand and verified.

I like to say my bike "Moo's" like a cow. It's kind of funny and fun. I know alot of the hyper 821/939 do it. I believe that it make a suction noise when you open the cap. To verify if it's sucking or blowing you could take a match, place it next to the gas cap n open it. If it sucks the flame...

On the 821/939 the fueling down low is very lean. This causes bucking and popping between 4-5k rpm on most of them. You will see many reviews about poor low rpm fueling for these bikes. Those bikes you can unplug the O2 sensors and it gets better but still there. None of the piggyback tuners can...

I think we might be talking about 2 different things when referring to TPS. There are 2 TPS , one on each throtlebodie. The grip part is the sending unit and that is the piece that has a technical service bulletin on many of the bikes but a brand new one is under $100 I believe (I bought one...

It is very rare that the TPS in these throtlebodies (unlike the old units). I have 2 throtlebodies in pieces sitting in front of me right now and they aren't seperate consumable items. There was a TSB for the throttle tube on a batch of these bikes. That could be your issue. You could also...

I have never need it but I see where Kul is talking about. Back in auto shop class (highschool) in the late nineteen hundreds our teacher talked about sealant that I always held on to. He said that if you are to add any sealant to any gasket it should be applied very thinly to that whole...

I also feel it's a great starting point and the least expensive. It definitely smooths out the 4-5k rpm. It's a little odd seeing -3° on days that it's only 35°f but I am totally fine with that since it smoothed things out.

Mine is not as smooth but that is probably because of the light weight flywheel. Tends to make things more twitchie and little changes in throttle makes a big feel on the seat. But all in all, after a couple hundred more miles I would definitely recommend this to anyone having the under 5k...

Have you opened up the auto tune perramiters now that the booster is on? I have been thinking about making the value under 5k -0- (which is neutral fueling for the ecu) and opening up the amount the auto tune can adjust. I have it turned off now and just the Kul map. In the past I turned on auto...

I have had one on for a couple hundred miles now and I totally agree with you. It made a vast improvement in the low end. I no longer have a -lean condition on bank one- code and the bike has made life under 5k rpm enjoyable. Before I spend hundreds of dollars on various components and it never...

The booster plug pretty much solved my sputtering issue. I have the Cordona stand alone QS on its way. I'll be pulling the RB QS. Might even pull the whole RB tuner and install the Powercommander along with auto tune module. I havnt decided yet. The booster plug along with RB Evo seems to have...

Gear indicator and quickshifter will be on every bike I own going forward. It's just like Gat said but with the QS as well. People often say that they can shift super fast so they don't need it or it's not as involved or connected to the bike but I have to tell you, if you haven't messed with...