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General => Technical | How To => Topic started by: rgy on August 31, 2009, 08:58:06 PM

Title: oil injection hose
Post by: rgy on August 31, 2009, 08:58:06 PM

I have a ZX 50 and the oil injection hose came out of the carburater and the engine temperarily siezed.  I poured some Marvil Mystery oil in the cylinder and got it back running but how do I get the fitting to stay in the carb?  also i lost a couple MPH from this. :'(

Title: Re: oil injection hose
Post by: Shaka on September 01, 2009, 12:23:39 AM

Wow, that sucks!  At least you got it running again!  It's probably a good time to think about upgrading the cylinder and piston. :)  You can use some LOCTITE 609 Retaining Compound Press Fit to hold that fitting into the carb.  You might also want to think about just running premix!  I'm doing that on mine after I did the cylinder upgrade just to be sure it is getting enough oil.  I just fill up a 5 gal gas can about once a month, not as big of a pain as I thought.  Plus, it gives me peace of mind!

Title: Re: oil injection hose
Post by: rgy on September 01, 2009, 12:42:50 AM

what ratio do you mix, 50:1 ??  I was thinking the same thing just premix.  the owners manual actualy says to watch for the fitting coming out of the carb.  seems like they would have redesigned once they knew it could work out.

Title: Re: oil injection hose
Post by: Shaka on September 01, 2009, 01:51:32 AM

I run more like a 35:1 - 40:1.  I am also running an aluminum 70cc cylinder and piston though. 

Title: Re: oil injection hose
Post by: rgy on September 10, 2009, 06:26:39 PM

took my scooters in and they epoxied the fittings into the carb.  i guess i probably could have just used lock tite.  i got lucky on the one that siezed and did no apparent harm as it runs right with my other zx50.. 47/48 mph.

Title: Re: oil injection hose
Post by: zombie on September 10, 2009, 06:57:12 PM

It seems to me you would have to be EXTREMELY lucky to get away w/ NO damage to the cylinder, piston, or rings. I would at least pull the cylinder to check for a stuck ring, due to the aluminum piston dragging on the cyl. wall. It will only cost a few bucks for gaskets, and it may save a LONG walk or maybe even a large tow bill. Good luck!

Title: Re: oil injection hose
Post by: rgy on September 11, 2009, 01:43:18 PM

Zombie, you are probably correct as another person commented on the stuck ring.  I'll take it in this winter and have them check it out and if there is damage take it to a 70cc.

Title: Re: oil injection hose
Post by: zombie on September 11, 2009, 08:04:38 PM

If you do, I would sugest getting an iron cyl. vs. the aluminun setup. You can do more porting on the iron jug w/o affecting durrability, And the extra 3-4 lbs can be recovered elsewhere