single knock in top end

[brothercowen]

Im going back together with a top end rebuild, new pistons rings gaskets plugs. But when I tork the rocker box on and kick it over theres a loud knock, ive adjusted the vaulves several times and the knock persists. It knocks right before the left cylnder exughst stroke, but i cant determin if the knock is on either side. Im stumped, please help

 

[drewpy]

cam timing out

hello BTW

 

[brothercowen]

Haha sorry, HELLO everybody and drewpy. Any reason why you say cam timing out? Have you had the same problem? Thanks for replying!

 

[drewpy]

Haha sorry, HELLO everybody and drewpy. Any reason why you say cam timing out? Have you had the same problem? Thanks for replying!

no but of peeps have missed the timing by 1 or 2 teeth, easy to do

 

[brothercowen]

Thanks drewpy! That solved that problem. Now I have another... I got the bike to idle, but when I rev it up the rpms dont come down like it should, it stays at about 3000,3500 rpm for about 4-5 seconds then drops back down to idle, ive adjusted the idle mixture screws and synced the carbs best I could. It seems like its getting to much gas, but I cant figure it out. Any ideas? Thanks!

 

[Wolfe_11B]

Hanging RPM is usually a lean condition.

 

[xschris]

Did you use a manometer to sync them? What type of air filters are you using?

 

[brothercowen]

I did not use a manometer, I dont have access to one. But I bench synced them to the best of my ability, and im using the stock air filters, no pods

 

[xschris]

You can make one for cheap. There are videos on the net and threads in the forum for this. Trust me a bench sync won't do it