Thinking of modding my 79cc



mark20

Active Member
Joined
Sep 26, 2018
Messages
437
they are taller than the 79cc and it’s side play. < >
hmm,
my 196 has side play as well, i adjusted them and it runs well.
try adjusting them .005. and tighten the sh*t out of them.
i would check cam timing, did you put on the lash caps?
 

FNTPuck

Well-Known Member
Joined
Jul 2, 2018
Messages
427
You should be adjusting the rocker preload on the base of the cam lobe with zero pressure on the springs. Not sure what style the 79cc has, plain old nuts or if it has a center locknut, but make sure it is firm once you have proper preload dialed in.
 

Will'smotobikes19

Well-Known Member
Joined
Apr 9, 2018
Messages
1,578
I’m messing with it right now no compression. I put the stock springs back in. It either has no compression or it does but the rockers wiggle after I pull the cord it has the locknut
 

Will'smotobikes19

Well-Known Member
Joined
Apr 9, 2018
Messages
1,578
I’m ready to throw this thing outside. It was working better with the stock 212 springs. The hemi 212 has such a better rocker design.
 

Will'smotobikes19

Well-Known Member
Joined
Apr 9, 2018
Messages
1,578
Know what I’m just gonna call it good since I can feel pressure coming out the spark plug hole. Don’t care if the rockers make a little noise. Gonna fill with oil
 

FNTPuck

Well-Known Member
Joined
Jul 2, 2018
Messages
427
Know what I’m just gonna call it good since I can feel pressure coming out the spark plug hole. Don’t care if the rockers make a little noise. Gonna fill with oil
Don't run it with loose rockers, you will beat the valvestems to crap and possibly send metal through the engine.

Valvetrain isn't something you can get away with just "close enough".
 

Will'smotobikes19

Well-Known Member
Joined
Apr 9, 2018
Messages
1,578
Bought the thing 3 years ago don’t really care IF it got messed up. $99 10 min away. Never the less if I tighten the adjustment nuts any more it just pushes on the valve and messes it up- no compression. If I do it like you said the rocker still wobbles and there is more space in between out of nowhere after I cycle the engine. Like I said the rocker design is bad compared to the hemi 212. There is a solid pivot pin instead of a rounded bottom nut on a piece of stamped steel.
 
Top