Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Hey engine-man,

upon closer inspection, there is a way to adjust the valves, I just adjusted mine, and no longer have compression leaking out of the carburetor.

-notice the lifters have a small hex bolt threaded in to the lifter itself.
I removed the lifter block, and gently heated (with a heat gun) the lifter that was causing the leaking intake valve. 

This has to be done with a lot of care not to scratch the lifter or break off the hex bolt’s tiny threads. The hex bolt is held in place with loctite; so I gently heated the threads of the bolt, and used a tiny pair of needle nose pliers to run the hex bolt 1/2 turn in clockwise, exposing less threads and giving more clearance to the valve lash.

I’m going to work on cam timing when I get back home today…. After studying Mr. Jin’s videos, his R31 is definitely running & turning clockwise just like his other V twins.  I absolutely love my knucklehead engine, after getting it broken in, it runs beautifully.  And, like you mentioned in another post, the only thing I would like to see different on these engines is the exhaust pipe design… I wish in the future that Mr Jin will make a set of chrome / stainless slash cut pipes as an option