gx390

My current project called " THE OX " will be a 2 wheel drive minibike it will be my version of a over built rokon with more horsepower and a better suspension. At the cost of being heavier I want to use this vehicle to explore in areas that most vehicles can't get to so it occurred to me that...

According to the Honda specs they both have the same bore and stroke. What makes them rated at different power levels? Head cc's?

I have been researching lighting coils for my 420cc Predator. I have read and been told that the GX390 stuff will fit. Can I get a little advice on out put. There is a 3 amp, a 10 amp and an 18 amp output setup. I figure the 10 amp will keep the battery charged and the lights on. Anybody...

I got a new one but don't have any instructions or info with it anymore. Or the coil bracket. What is the timing mark set at for the s2 gx390 flywheel ? And how do you use the degree wheel on these smaller engines. And a long shot but does anybody have a coil bracket or know what I...

I am not sure what to call this one (not that my projects need names, lol). In keeping my promise to make an attempt to move forward and remain positive, I decided to share a project I have been working on more recently and get you guys and gals a little better caught up on it! A few months...

Looking for a cam, billet rod, 1:3-1 ratio rockers, big valve head..

Fresh build, with no time on it. - Studded block - Governor removed -Oil alert removed - HD valve springs - Billet ratio rockers - HD pushrods - Guideplate for HD's - New Honda steel rod with removable bearings - New Honda piston and rings - New Honda valves and retainers - Governor...

What is the best camshaft for my engine gx390 if i need more speed. Planning to buy 307 lift 260 duration.what does it mean 307rpm camshaft grind?by the way my engine is for boat racing. Direct drive..

Hey guys, I am going to use an electric start, big block, motor for my next project- a kart this time. Anyways I want to save a few bucks and get the Predator 420 motor. BUT No one makes heavy mods for it. I asked some folks at OldMiniBikes warehouse, as they have GX390 parts and 420 Parts listed...

Hey guys I have a finished mild build motor however I do not have a throttle linkage. I was looking around at either getting a clone top plate or a throttle linkage kit off ebay. However I am running a gx390 carb on a 6.5hp lifan model 168f-2e. The block is 9004 6036. I have been looking around...

Has anyone installed a gx390 carb onto a 6.5hp clone or predator motor? What were your engine builds and general rpm ranges? I have a mild built clone I'm thinking about putting a gx390 carb onto and was curious to see what others have noticed. My build will generally be in the 5000-7500 rpm...

3 weeks of hard labor to get this supercharger setup done. But it was worth it. Ungodly power! https://www.youtube.com/watch?v=s41umwMN35E

Wanna get input on what jets to start out with to run on gas/alky? What seems to run the best?

Hardly used gx390 Raceseng Rev Roller Rockers S2 1.3:1 ratio $130.00 plus shipping.

For sale Gx340/390 hardly used Raseseng Billet Rev Flywheel weighs in at 2.27 lbs. and features a rare earth neodymium magnet that throws a spark 100% hotter then a stock flywheel. The Rev Wheel comes with a coil relocation bracket & timing tape that allows you to adjust your ignition timing...

Since our Stage 1 kits are so popular for the GX200 and Predator 212, We now offer them for the big block GX390 and Pred420cc as well!!! https://www.OldMiniBikes.com/honda-gx390-pred420-mini-bike-kit-stage-1.html...

i need a quiet muffler for a 13hp honda. i put on a canister style 3/4 inlet made for a smaller engine and its blown out already.

Hey guys, I'm looking for either a 1 inch clutch for a Honda GX390, or if anyone has a 40 series torque converter laying around that they wouldn't mind getting rid of that'd be awesome as well. Thanks guys and just shoot me a pm!

I have a predator 212cc with a OldMiniBikes stage 1 kit w/aluminium flywheel. I put the bigger e-tube and #37 jet in the carb. I also have a seized up honda gx390 pressurewasher with a good carb on it. Which is better? Is it a direct bolt on ?

Whats up mini bike I just brought GX390 ae2 motor I need advice on how to beef it out so I could get 20hp or more out of it. I have billet flywheel, big bore and lectron 34mm carb. Im trying to figure out what else I need. Any info would be appreciated.