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Listen up You need a tune to get the most out of these 390s. If you want the most out of your configuration, Chad is the man. Hey- stock, mild build, or "superbike", WellsTuned is your one stop shop. Yes I have driven the 8.5 hours one way for this man to put his hand on my motor. I'd do it...

Some of you may know that we (G-Baby Racing) had a catastrophic clutch basket failure on our bike. The result was the engine primary was locked to the transmission main shaft. (you couldn't release the clutch). It happened while one of our riders was preparing to practice the launch. Made a...

February 2016 RRW interview If you all are interested, I'm putting together my thoughts and experiences with this bike with a year of nationally racing it in endurance and sprints. My reasons and thoughts for the build in this article, where it is now, and where it's going.

If you race, could you please send me a private message. Jim

If you are looking for a new RC390 - Letko Cycles in Olathe Kansas (Kansas City) has 3 street versions on the floor ready for you to ride away. Letko Cycles 12535 Rogers Rd, Olathe, KS 66062 (913) 829-6969

"G-Baby Too" finishes 2nd in class (ULWGP) and 9th overall in the CMRA 6 hour LW Endurance at Motorsport Ranch Cresson TX! (Reported on 7-25-15 102 degrees F) First time that we know of that a RC390 has been endurance raced in North America. https://www.facebook.com/GBabyRacing

Installed the GSG sliders. I ran this weekend while testing. Didn't even know they were there. Of course didn't crash test them either :-)

The RC390 goes on the Dyno this evening for a fine tune at Olathe Suzuki in Olathe, KS. This is on a latest DynaJet 250 with eddie current braking and latest SW. Olathe Suzuki is and has been a certified Dynajet tuning center for many years. Their unit is typically conservative with it's...

These really have a fair amount of up/down twisting flex when you transfer weight around on the bike. This normal? I will be testing these this coming weekend. Not that I want to test this part, but I'm questioning crash-ability of these. Anybody with KTM Powerparts rear-sets - any flex of...

Installed a new PCV from KTM Performance today. Yesterday I checked valve clearances and spark plug gap (plug was too wide BTW). Then I had the AKRO 9031 map loaded at my KTM dealer in prep for this update, Chad loaded his map for the Akro exhaust, KN filter, and air box cover delete. Next...

Installed Tyga Performance rear sets today. Not a bad kit at all. I f you use common sense it is not a difficult install. I'd been dying to get in to look at the swing arm bushing since last year when I saw my first RC390 in person. I figured chances were pretty good you would want to check...

51mm 7 degree units installed. I think I'm going to mod the upper triple to eliminate the factory bar mounts

First, I do not work for Commonwealth Motorcycles. I'm an independent road racer and M/C endurance team owner. This is a first update to the install I did yesterday on our RC390. Got this kit due to vague up shifting we experienced at race pace. Sometimes the shift would fall back without...

Finally found some time and got the front forks completely disassembled. I now have a front spring swap for the stock forks.

I will be sending my forks to Traxxion next Monday for an AK20 cartridge build and install. While there, they will also develop a spring, damper, oil upgrade package for budget upgrades (likely in the $300USD range). More info later. We have finalized the JRi package for the rear and have...

We were at Willow Springs 4-24,24,26 AHRMA rounds. Stock gearing left Nicole hanging out at 500 under the limiter from T7-T9. 4-20 to 5-1 we ran at AHRMA Sears Point (Sonoma) and the stock gearing was pretty much there. The AHRMA SOS2 450 single motors were no match, but our handling was...

600 mile sign off at 550 - So the process really begins now. "Rainy day cut short our testing today. We only got 3 sessions before the lightning came and the rain never quit for the balance of the day. We decided nothing more to be gained and kept wheels off track for the rest of the day...

Installed a new Arrow exhaust yesterday! Very nice.

How can you defeat the side stand switch on these machines? Anyone try yet?

Deposit down for a RC390 at Letko Cycle in Olathe, KS. Mine is on order and will be their first received. I own an all girls endurance motorcycle race team running SV650 endurance prepped machines. We will be developing this RC390 machine for light weight endurance racing.