Duromax 440cc same as GX390 GX340?

What GX390 parts are the same on a Duromax?
DuroMax XP18HPE 440cc Recoil/Electric Start Gas
amzn.to/44oN2jU
About this item
440cc D 4-stroke overhead valve design engine that has E-Z pull recoil start
Shaft is 1 in. In dia and 2-3/4 in. Long, while the end is 3/8 in. Size 24 unf - Drilled and tapped
1.7 gal. Fuel tank which at half load can run over 3 hours on a single tank of fuel
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[@hunterdoncanady]

the honda is heavier because its build stronger and more reinforced

[@garyalensr]

Thank you for doing this video, this was definitely a very interesting video. I would have never thought they were so similar. Man bro John is growing up so fast. Hes gonna be a great mechanic learning from you. Hope you and your family have a great 4th. Todays my birthday 🎉🎉

[@snipezilla69]

You and your kid are hilarious what a great father son relationship

[@fish_R_stinky69]

Fr.

[@DuroMaxPower]

WOW! This is an amazing video! We love to see you both do this!

[@philliphall5198]

Yes I really like the replacement rod inserts

[@Gmcworrior1]

I just started the video and i already love it

[@donwiley1055]

Good job keep up the great work

[@davidvail3838]

Great video. You missed the hose on the GX air box. Not there where their is one on the Duromax air box. This could account for the weight difference.

[@redneckcomputergeek]

Good catch! I bet your right :)

[@davidvail3838]

@@redneckcomputergeek In which case they are most likely the same weight. I think that the Duromax box would be better with the less restrictive air flow and bigger port.

[@fish_R_stinky69]

Bro, this is so silly. 0.4% of a pound isn't gonna win a race😭😭

[@redneckracing674.5]

this made my day. thanks!

[@mortneff4674]

Good video

[@tkskagen]

Another very informative video RCG. HELLO from Western Washington State! The "Nationally Opposite" location of your family...

[@henzoemckoy805]

Greatings bro I'll love this video the Lord bless you an family 🙏

[@liljoeii6091]

Happy fourth july to your whole family Thank you for the video And Thank you to all our military for our freedom every day

[@bradensmith888]

This is my interpretation of compatible performance parts for the D-handle Duromax 440cc electric engine (credit to RCG Racing for engine teardown/analysis): Camshaft: Any gx390 performance camshaft like the DC308-GX390 308 camshaft (GoPowerSports) BilletAluminum flywheel with starter ring gear: Any gx390 performance flywheel like the 6623-E (NR Racing) BilletAluminum Connecting Rod: Any gx390 performance connecting rod like the ARC6272 (GoPowerSports) 55 lb Valve Springs: Comp Cams GP966-2 (use only the larger diameter springs that come in the kit) Head Gasket: MLS92-027 (NR Racing) Side Cover Gasket: Any gx390 side cover gasket like SCG420 (GoPowerSports) Exhaust header: ARSPORT XP16HPE or XP18HPE header Billet Side cover: 6059 (NR Racing) Intake adapter: Any gx390 intake adapter will fit, but the adapter will need ported/bored out to get the full flow benefit of the 440cc port like KDMIKMAN301420 (GoPowerSports) Ratio Rockers: Any gx390 ratio rockers like 390-ROLLRCKS (NR Racing) Piston: NR460 (NR Racing) - recommended to use stroker crank to get full benefit of flat top piston (#6774 [NR Racing]) Magnetic Dipstick: WEN GNA200 (Amazon) Hope this helps, feel free to provide input if you have any

[@joshgoss109]

I have a gx270. What carburetor do you recommend for it? I need to replace it bc i broke the air fuel adjustment screw off in it.

[@fish_R_stinky69]

PZ27/PZ30

[@bradensmith888]

Could you please provide the NR racing part number for the Duromax 440 head gasket?

[@fish_R_stinky69]

No.

[@Richard_Gobbler]

Unfortunatley i have an older style duromax with the round flywheel cover so i dont know if any of this applies 🤦‍♂️🤦‍♂️

[@fish_R_stinky69]

Fr.

[@phantom2488]

i think at the end of the day it boils down to reliability

[@ThunderDivine]

Hope you know it's a clone lol, I don't get it.

[@mudder517]

Compare 18 hp vs 11 hp lol

[@bradensmith888]

The issue is that the Duromax 440cc doesn't actually make 18hp; it is a theoretical calculation based on displacement and max rpm

[@FLORIDAMANIAM-he2lz]

Yeeerrrrp.

[@fish_R_stinky69]

@@bradensmith888 You can't dyno it???

[@fish_R_stinky69]

@@bradensmith888 Well, a 420 made 30 hp on a dyno.

[@bradensmith888]

@@fish_R_stinky69 Where can I find that 30 hp engine? I'd like to see it tested