Jump to content
Sign in to follow this  

Dyno Conundrum...

Recommended Posts

Got my 400sm on the dyno this morning (for free) and was a little confused with the results.

My Bike:



K&N filter

TT 39mm FCR-MX

-160 Main Jet

-200 Main Air Jet

-Pilot Air Jet removed

-45 Pilot Jet

-EMN Needle clip 3

-2 turns fuel screw

-O-ring mod

-Timing screw in 1/2 turn

FMF Powerbomb Header

FMF Titanium 4 (open)

Hotcams intake and exhaust

Conti-force supermoto tire (150) @40.0 PSI

Temp 65.0 F.....Humidity 34%.....Elevation 1221ft

EK X-ring Chain

---Any feedback is appreciated as I thought the bike would make more RWHP




***Run_003 was with airbox cover (side panel) Removed***

Share this post

Link to post
Share on other sites

needs a smaller main jet.

power numbers are relative to that dyno.

how much power does a stock drz make on that dyno?

power isnt that far off with that pipe.

Share this post

Link to post
Share on other sites

for the main, would a 158 or 155 work better?

The dyno was a dynojet250i, and I have no idea what a stock drz made on that specific dyno..For what its worth they dynoed a yfz450 with a full motoworks system and PC and it made 38 at the wheels...

And for the pipe...im looking into an mrd/ssw shorty.

Share this post

Link to post
Share on other sites

with that pipe a 155 is likely correct.

cant compare atv's with motorcycles. they have way more weight to turn at the wheel.

you will be 40hp pretty easy with the mrd pipe.

Share this post

Link to post
Share on other sites

I understand the ATV to motorcycle comparison i.e. the "for what its worth" part haha

Thanks for the info:thumbsup:

Edit: if i were to run the mrd could i leave the 160 MJ in?

Edited by KaiserRolls
add info

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this  

  • Similar Content

    • By Bignerd0100100
      Hey all, 
      I'm looking at buying a 2004 Suzuki DRZ400EK or at least I think it's an EK according to Vin lookup websites, but it does not appear to have a kickstarter. I was told the bike was owned by a motorcycle dealer and that it has a current green sticker, and a California license plate but has not been registered for the streets since 2011. I want this as a dual sport but am not clear if the fact that it already has a plate means I am good to register it or if maybe they took away the ability to register it after it was plated, California loves to do that kind of stuff. Since the bike was owned by a dealer I would think they were up on the latest regulations in California, but who knows. Can anyone add any insight as to what I should look for on the bike itself like the carburetor, model numbers etc? Or do I just try my luck at the DMV?
    • By smokey9lives
      I have a 2003 DRZ (actually a KLX400) and the head tube bearings are shot.  I ordered a new set to install but I'm wondering if anyone has any recommendations on other parts I should replace while I have the front disassembled.  I was thinking about new rubber fork protectors, but are there other things that wear out on the DRZ front ends that you can only get to when disassambled?
      I also broke off a replacement key that I got for the steering lock.  I must have been made of cheap pot-metal.  Should I just remove the whole lock mechanism?
      Any tips or tricks for getting the old bearings out and the new ones in would be welcome!
    • By antonyp
      Hey Guys,
      I recently bought a 2003 DRZ400S and thought it would be a good idea to check the valves clearance etc . I timed the engine on TDC with the magneto mark aligned as per the manual but I find the cam timing slightly odd. The arrows pointing upward are on the 1st and 15th pin as they should but with the magneto timing mark aligned they are not perfectly straight. Same goes for the arrows that should be parallel to the cylinder head casing. Is this normal or should they be absolutely perfect ?