Smokey Honda

[johnhos]

I got a 2nd hand GX120 (it was cheep) for my minibike project but the motor smokes (white smoke). It starts first pull every time, it runs well (it was running for about 1/2hr) it not over full with oil. Does anyone have any suggestions to make it smoke less.

 

[Jay Wrix]

Its likely To Be Burning Oil
Replace Rings, Could Be Bad Valve Guides, But most likely the rings have become worn, and its not sealing well oils slipping by and getting burned up making smoke.

Do you have access to a compression tester? You could see if the compressions really low, or even better would be a leakdown test

 

[johnhos]

If was the rings then wouldn't be difficult to start? (depending on how bad they are). I may know someone with a compression tester

 

[Jay Wrix]

Not always, if they are really bed then id imagine so, that and lack of power, and a dozen other things.

See if you can check the compression,

Another thing, Is the breather full functional? and not plugged up?

 

[johnhos]

I can check the breather when I get home tonight

 

[johnhos]

The breather wasn't blocked, still trying to find a compression tester.

 

[johnhos]

What sort of reading should I get on a compression tester if the ring were ok?

 

[Jay Wrix]

Im trying to find the actual number, Im guessing over or around 150

 

[blownengine]

No way. With the automatic compression release it would be much less

 

[Jay Wrix]

I Didnt Think About That.

 

[Vaxian]

Smoke B Gone

The cheapest route is to buy a bottle of Smoke B Gone, stuff works.

The best thing would be to put new rings in it.

 

[125ccCrazy]

if you re-ring it get a set of .010 over rings and file fit them to .004 gap, with the cylinder worn some this will give you tighter gaps than a stock size ring to take up any over bore from being worn thus resulting in better compression and power..

 

[johnhos]

I'm pricing up a set of rings at the moment

 

[milo raptors]

:hammer:Isnt oil smoke blue i think it might be to rich if what i think is coret