my new engine

[LarryW]

I would try putting it back together right and running it. If it dont use any oil/no smoke,knocks,etc... Keep it and run it with the governor guts installed but over ride it like I did. I never looked into removing the guts so Im not sure about the gear splashing oil but could be possible. I know ponys are ponys but I dont think it would be that much of an increase in hp with the gear removed anyway. Obviously extra weight spinning will take some but I dont think its anything substantial.

[scotty.rodgers]

Larry, any idea on the compression the engine should have, got it back together and cant get it to start gonna check compression next , have spark, fuel , air. just need to know how much i should have.

[LarryW]

Not off hand so I did some searching and the honda gxv390 should be between 71-120 it looks like according to some other post on another site someone stated. Probably not 100% but should give you an idea at least.

[thebuggyman1]

I'm pretty sure those DO NOT have a compression relief mechanizm......so I'd say 100 would be low. 120+ would be good

[scotty.rodgers]

30......looks like its going back for replacement

[Bazooo guy]

I would leave the governor connected at least until the break in period is finished.
Its too easy to over-rev the engine when your in the mud.

[scotty.rodgers]

ok just waiting on the replacement from the factory, no questions asked just had to pay the shipping of the old one back. should be here soon so in the meantime i yanked larryw's idea and put in the split shifter and new throttle, used a bike brake lever which is all aluminum instead of plastic like the old one.IMG_3263.jpgIMG_3264.jpg

[Ml-toys]

so what is the final outcome of this build with the duromax ? I am curious because i may use the same motor

[scotty.rodgers]

Engine is solid some minor adjustments are needed
eBay is where I got mine at 300 plus a year warranty
Mine runs great if u wanna run tracks I recommend 18 hp min or beef the 13 up with custom parts before u run it so it saves on extra gaskets and effort only drawback is the recoil start as it is opposite from the rear so u have to make a way to hand start it in case of a dead battery

[Iwantonetoo]

Yes they are really cheap. Why so cheap, is there something I should know about these engines before I buy one. And I noticed they are not twin cylinder doesn't that matter??