LD100 bicycle engine

The LD100 dual head is too thin and will warp from heat. I replaced mine with a Smolik head. Used PZ20 carb and jog exhaust pipe. 25% of piston blocks intake at bdc but I still get 10,900 rpms and 52mph with 11/36 gearing. Ran 40:1 Lucas semi synthetic from day one. I used a Schwinn Jaguar.
Jim Pio

 

[Karl Snarl]

I have a 50cc it was my first kit, the cylender is destroyed and 3 of the bolt housings on the bottom end broke off. Still usabe?

Some of it may be useable. Tear it all apart and send me some pictures of it all. Clear pics please. Prob be best to start a new thread for that an just link me to it. So others can chime in and help too.

 

[Karl Snarl]

But would port work increase top end at all? i was watching LA hover he got 10 extra mph out of porting the yd, also could my speed be associated with timing?

These engines are all about port timing.

 

[CrispyLeaves98]

These engines are all about port timing.

okay i made a new post.

 

[Karl Snarl]

okay i made a new post.

I'll get to it soon as I can little bro.

 

[CrispyLeaves98]

The LD100 dual head is too thin and will warp from heat. I replaced mine with a Smolik head. Used PZ20 carb and jog exhaust pipe. 25% of piston blocks intake at bdc but I still get 10,900 rpms and 52mph with 11/36 gearing. Ran 40:1 Lucas semi synthetic from day one. I used a Schwinn Jaguar.
Jim Pio

How did you mount the pipe

 

[Nova1971]

How did you mount the pipe

 

[Nova1971]

The LD100 dual head is too thin and will warp from heat. I replaced mine with a Smolik head. Used PZ20 carb and jog exhaust pipe. 25% of piston blocks intake at bdc but I still get 10,900 rpms and 52mph with 11/36 gearing. Ran 40:1 Lucas semi synthetic from day one. I used a Schwinn Jaguar.
Jim Pio