Port timings for torque

[theguy2024]

What are good port durations for good low end power while still keeping good top end speed?

I’ve heard between 110-130 intake, 150 for exhaust and 120 for transfers. Thoughts?

Also my 66cc iron sleeve transfers are not flush with the top. I heard it’s good to fill the empty space with JB weld so it’s flush?

 

[Greg58]

I’ve checked several of my engines and all are different, there is no set standard. It’s hard to get higher rpm without hurting bottom end . If you don’t already have the 2 stroke handbook it gives a lot of info. Graham Bell did a lot as well.

 

[Mossy]

For torque some have used the pk 80 short rod wildcat cylinder with the long rod zeda crank... Puts the exaust port lower... It's not a simple swap and needs some work to get the squish right... Some gasket stacking or a spacer...