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All are brand new 0 miles items. I have a headlamp assembly, tail light, and passenger seat/cowl. PM if interested. Make offer probably wont be refused! Shipping on you. Will send pics. You can email me too, [email protected]. ALL GONE

Guys I have one let on the shelf. My supplier is shut down, not sure when I'll be able to have more. If you want it get it now. Respond on here first before placing the order so I know who get's it fairly. Thanks and stay safe!

I am selling my '17 on proto pcv. Same as production unit, expect no sticker on it. It was only used for dyno sessions, testing, and building maps. Just like the current units does not come with O2 optimizer. Will include the cable and map of your choice. $ 250 plus shipping. PP F&F. Email me...

I have a brand new oem piston assembly, with rings, wrist pin, and circlips available. PM me if you need it, will make fair price on it. Will send pics if needed. P/N 90230007000, replaced by P/N 90230007200, fits all 390, '13-19.

In a week or so I will have these available for the Duke crowd!

I think I am going to have some +3 mm pistons made. Available for purchase with gaskets (head/base), head bolts and exhaust gasket. I am trying to source a couple used cylinders now so I can have them bored/plated to size on the shelf. If I cant, you guys will be responsible for having your...

A couple pieces of information that covers several areas. First for all of those who have asked the new high mount Ti akra system on the SSP300 is not and will not be offered as a KTM powerparts exhaust system, in the near future. There is limited quantity for the SSP kits being sold and only...

Yoshimura's new race and street slip-ons are hitting our shelves next week! A really great looking system that so far is the only kit to replace the pre-muffler and catalytic converter! While we have not been able to put them on the Dyno yet, we expect really good results. Check out the links...

Look what showed up today! '17 RbW PCV, First one built for testing purposes ;) Just awaiting the exhaust to show up any day now!

If you guys have purchased from us, have been helped on the forum etc and are on Facebook please star/write us a review. I know a lot you guys 'like'' our page already, but if not like us too. We have special things on there on occasion ;). https://www.facebook.com/pg/Commonwealth.Motorcycles

Stock unit I have been modifying and looking for more gains with the engine kit! I lightly blended the bore, cleaned up/radiused shaft and tapered throttle plate on first iteration. Dyno data was collected same day back to back on stock throttle body to modified one. Found over a horse...

Had a little time to make a proto type piece here to verify fitment and check operation. I am using Frank's captive spacers in the front wheel. Please give me some feedback and or interest in it so I can get a price on having some CNC'ed. Works very well, just loosen pinch bolts and axle and...

Just finished this 'light' build. Same bike in both graphs. Bike configuration is; stock exhaust, K&N filter, open lid, with a PCV. The blue curves are the stock engine, with before mentioned external mods, tuned. The green curves are with thin gaskets installed, head porting, valve touch up...

Long awaited post. Sorry for the delay. The Yoshimura is a good alternative option to the Akrapovic system. Each have their pros and cons. Will be discussing each along the way. First set of data. The blue line is bone stock average blue. The green line is only installing the yosh system, and...

I have 10 units on the way, shipped yesterday. I will have on hand and ready to ship this Friday(7/3). Hurry and buy now before they're gone! First 10 production units, only place to get them. Next batch will be a bit, other places don't/won't have them. Retail is $449, selling for $430. PM me...

We have thin gaskets and timing chain tensioners in stock and active for sale on the site now. If you plan to purchase my engine kit piston/cams/etc these items are included, meaning don't purchase separately now. These items are for club racing rules(retaining stock piston/cams), track days...

Long awaited on both ends. I installed the pcv on a cup bike here. The throttle stop has been removed. Couple pieces of data, initial data is bone stock out of crate(stop removed), stock air filter and lid, dB killer installed, with Akra map. Graph shows "stock" this bike vs fully tuned (with...

Sneak Peak with the new cams. Pistons should be in early June.

We have the 606HH in stock now for 390's. To hold you over until the Brembo SC pad is available.... KTM Store :: KTM Street Powerparts :: 390 DUKE :: Brakes :: PERFORMANCE BRAKE PADS FOR KTM 390 BY EBC FA606HH

Guys, I will have the Factory Pro shift kit available soon. I have the first one on the way back today to check fitment and spring tension. They will be available pretty quickly. It will be a kit with new spring, detent arm fitted with hybrid bearing and a clutch cover gasket. We are retro...