engine

Was doing a little research and I am finding discrepancies about which F.I. system our bikes have. Most articles I have read state that our bikes are using a Dellorto system. However on the KTM Moto America page they state that a Bosch system is used. I'm curious if the cup bikes are using a...

Dan Crower from DCR in Temecula, CA has my KTM RC 390 for R&D testing purposes. Stage 2 & 3 engine builds will follow sometime in the future... I'll post Dyno charts when available and you can follow him on Instagram dcamman or checkout his website http://danielcrowerracing.com

Yes its a fabulous looking fabulous handling bike on the open road but my UK machine only just twelve months old has been back at the dealers for about six weeks now trying to solve a stall issue - in busy traffic at a standstill it suddenly cuts out, not always but enough to be both a hindrance...

Need to replace the left engine cover, but I cannot find the part # anywhere. I can only find the clutch side, please help!

Just wondering if possible at all if the duke 690 engine would fit into the rc 390 frame i know you have alot of other variables aswell

So I received my Arrow GP exhaust and PCV last week. The PCV came with the Arrow Fuel Map installed. My questions are: 1. Should I get the bike on the dyno prior to installing everything to get a baseline? Is it a waste of money? 2. Does the tuner need the dyno baseline data to tune the...

My RC has the Akra pipe and map but still has that annoying surge when I roll the throttle on at the apex of a corner. It really upsets the bike. I dont know if remapping can fix it (maybe by adding fuel at the lower rpms?) but I was thinking about simply increasing the engine idle speed in...

Maybe this is common sense and I just missed out, somewhere. If so, I apologize if this seems stupid to anyone. Last weekend, I was doing an oil change and was also going to clean/lube the chain while everything was easily accessible. After doing the oil change, I started up the engine to let...

Does anyone know what the torque spec is for the bolt that mounts the engine to the chassis bracket? There is a spec in the manual that says 36.9 lbf ft, for the engine mounting bracket, so I don't think that is it. I want the spec for the bolt that holds the engine on. Any help would be...

Just trying to get an idea for the different weights and oils that folks are using. I used the factory break in oil and the Castrol 4T 10W-40 mineral oil then switched to full synthetic Mobil 4T 10W/40. Engine seems to have a lot of power and "kick" to it (for it's size). Excuse my...

Stock gearing should defenitely be 44t or 43t 45t is just to short for Any kind of street riding Highly recomend changing to 44 or 43 so your engine is not so overreved all The time

Anyone know where I can get the orange engine case sliders that the RC Cup bikes have on them???

There is a gear on the RHS end of the crank that drives the clutch (primary gear) as well as the cam chain. According to one of the RC Cup racers this gear needs to be tightened regularly if the bike is being raced. Apparently, it comes from the factory with insufficient torque on the nut. If it...

Is it me or does the "Combination Instrument" display lack a digital indication of the RPM? First, I am new to my RC 390 and i am just finding some things out. However, I cannot figure out the way to display the RPM in a digital mode. Yes, I see the analog bar increase in length as the RPMs...

I've been looking at the flexible rubber shroud between the radiator and engine head. At first I thought it was to improve cooling, but I'm thinking more that it might keep the hot air off the rider and maybe reduce engine noise. Do the Cup bikes have this floppy rubber sheet like the street...

Seems like a few people on here might like to chat about MotoGP. How about the new Suzuki bike in the qualifiers today? Pretty amazing performance setting the new lap record and taking positions one and two. The new engine they received for this race revs an additional 500 rpm. Pol, and...

Just installed MNNTHBX's intake cover along with a K&N (KT-1211) air cleaner filter, and what a difference in sound of engine, throttle response, and seat of the pants hp increase. Have Akra pipe and download installed, and from looking at the dyno specs it appeared to be rich enough that...

Questions: 1. Can it be done with the engine in frame or does the engine need to be dropped? If in frame pics and tips and tricks would be helpful -- looks kinda tight in there... 2. What size shims are they?

First engine oil and filters service after running in my engine 645miles and on the same oil and filters it came with. Will be doing a video as I go through it and this video will also show how to reset service interval on your instrument cluster.

After having my RC for 6 months the engine occasionally stalls 1 to 2 mins after starting, only happens when at a stop and about to take off, the engine won't start for about a minute after. Has anyone had anything similar?