Dyno test Kawasaki KX500 with VHM cylinder head with Dyno graph

Dyno test Kawasaki KX500! Dyno graph near the end of the video

00:08 Engine start with decompression valve
00:18 Testing standard versus VHM head
00:38 Making several dyno runs

[artvarnson]

I restored a 2004 KX 500... It got a Bondi Engines ported and polished cylinder and head.... Full fmf exhaust.... Boyesen rad valve.... Crank is balanced to. Love to now how much power mine is putting out. Wish some one would come out with a modern 500cc 2 stroke, I am convinced they would sell them like hot cakes.

[heartsky]

Had a '91 KX500, loved that bike, great for hill climbing in SoCal - Lambs Canyon, Ritchie Canyon, Dumont.

[frosthoe]

Spring 1994, My brand new 94 factory KHI Kx250 made 54HP and could overrev between gears to 8400rpms after Don Emler tickled it .The 94 Factory 500s that Jeff rode were about 75HP and Rpm lined around 8000 usable. I was also fortunate enough to run some of Don Emlers first fat pipes in 94 for the new KX stump pulling dragster engines. And the early moose heavy plate/carbon clutch packs. Early 94 season, only Hoffmasters pingmaster 93 RM 250 could hang with it out of the gate. Ahh the smell of melting 16 to 1 Compression pistons and illegal eye stinging methanol, mixed with the sweet smell of Motul oil dribbling from the silencer. priceless! (Brian H taught me to never, ever, ever, let off. Seth E taught me to not bother worrying .

[LordHolley]

I used to have a KX 500 AF and a desert racing prepped kx 500. Both of them were incredible to ride. More manageable and more powerful than the CR 500. Wish I never got rid of those bikes....

[CobraVeight]

Happy to say i owned KX500 about 1990, cool bike loved it, a bit faster that my, 49 Matchless 500 !

[moacyrjetpilot]

It seems to have the sound of a blades's fighting... 🤔🤘

[favillous]

I've always thought 500 needed more power

[DaleWalkerHoleshot]

Hi VHM I love your all brick dyno room, nice and cool, and controllable. Cheers Dale Walker / Holeshot Performance

[Blocanbentlyyahu]

Imagine the dyno fails and the kx500 gets a little bit of traction and just flies across the room 😂😂😂😂😂😂😂

[McNamEvan]

Stator cover was off in the beginning of the video. Did you adjust timing as well as head swap?

[olivertoeknuckle]

I still have a KX 500 today! It'stoo much bike for the woods where I live, but a flywheel weight tamed her a bit!

[codycall]

Wow, that graph was made with the windows 95 paint program. Judging by the 13 pixels, I'd have to say that was at most 6.13 horsepower gain. Given the pixel size

[bentagliarini]

Do cr500 comparison and put lb torque and bhp for both bikes as cant see this clearly

[EarthSurferUSA]

Nice looking head. Manufacturing expert here.

[jeffreygerber]

so I love dyno tests and anything to do with the legend KX500 but I would of liked a little more details on this head. So it has a Decomp valve ok I had one installed on mine reasonably priced. I assume the doom is machined and squish altered. I also see next to the test specs for run 1 and 2 a difference of 0.049 as opposed to 0.045. Also I see air temp difference of 19.8 °C as opposed to 18.5 °C. I don't know why that is cause the test says they are using the same air flow rate so why is temp different. It stands to reason that if that test run was running cooler it should make more power. I don't know just playing devils advocate but I feel I could get my stock head machined to maximize gains in this range and Cerokote it to look just as pretty. any thoughts????

[mmandm]

To keep it peaking higher into rpms do power valve stopper bolt mod to keep power valve cams from over opening at high ram. Boysen rad valve with moose spacer to get more internal cc of intake charge . Light wight clutch pack and basket for dipping out power.dont worry piston is heavy enough to keep it from stalling when lugging. A 39 pwk carb. And at least a 15-43 gearing with a 18 rear wheel 120/10018 tire and that bike will rocket to 100 mph.

[yteb]

Dyno test Kawasaki KX250 with VHM cylinder head with Dyno graph

[bonkeydollocks]

What did it make in the end, I haven't got my specs on

[solxrrFN]

Seems like alot of money and work for one extra hp!

[lindsaymcpherson]

How much HP in that one I couldn't read the graph