my new engine

[scotty.rodgers]

engine is in finally, but looks like im gonna need a bigger belt. I cant go any further front with the adjustments and of course another 1/2 in would probably do it. next comes throttle then exhaust, bilge pump and alternator later i think along with a split shifter

[scotty.rodgers]

ok massive fail, triple checked everything before starting two minute run time and seizure, dont get it. plenty of oil, only changes i made was governor removed, hi flow air filter, hand throttle installed, custom exhaust, new clutch nothing t6 induce seizure, now i have to pull the engine to send it back , luckily it has a 1 yr warranty on it since it was brand new. ARGH!!!!!!!!

[CROSSBOW]

I hate that Scotty, You put a lot of work in it just to pull it back out and do it again. Better luck on the next one i`m sure it will be worth it when you get her going.

[scotty.rodgers]

dont know what pisses me off more...the fact that it froze up or the fact that as soon as i pulled it and went through the hassle of putting it back to stock config that when i went and put the governor back in i had to loosen the piston from the crank to turn the crank to put thegovernor arm in and when i did it freed right up now it pulls fine not sure weather it was something i did when takin out the governor or what but im not sure if i should still return it or keep it? any sugestions? possibly something i did while taking it apart?

[gearhead1937]

When you pulled the governor did you take everything out including the gear inside? I've read on the buggy sites that this gear is used as an oil splasher inside the motor. Something to think about.

[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??