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]

Nice ride!

 

[Heavyload]

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

Nice chain set up, should keep that chain slap to a minimum.

 

[CrispyLeaves98]

Would the LD100 increase preformance with the wider ports? Im getting a carb and exhaust upgrade like a real MZ pipe and rather than porting my yd which im too scared to could I just get an LD

 

[Karl Snarl]

Would the LD100 increase preformance with the wider ports? Im getting a carb and exhaust upgrade like a real MZ pipe and rather than porting my yd which im too scared to could I just get an LD

An ld and a yd with proper squish and nice ports will give you more low end, not spin up. I can tell you are going for spin little bro, you're looking for speed. I'd honestly say you should learn to port and balance properly, an use a 50cc. You can spin a 50cc up real fast, and done right will make more ponies than an ld or yd. Not to mention be smooth as a shaved gorilla butt and sip gas like I sip scotch, neat and methodically.

 

[CrispyLeaves98]

An ld and a yd with proper squish and nice ports will give you more low end, not spin up. I can tell you are going for spin little bro, you're looking for speed. I'd honestly say you should learn to port and balance properly, an use a 50cc. You can spin a 50cc up real fast, and done right will make more ponies than an ld or yd. Not to mention be smooth as a shaved gorilla butt and sip gas like I sip scotch, neat and methodically.

50cc somther than 66cc?

 

[Karl Snarl]

Stock, and way smoother if you balance it all. Then 50cc aren't no joke when done up proper like.

 

[CrispyLeaves98]

Stock, and way smoother if you balance it all. Then 50cc aren't no joke when done up proper like.

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?

 

[CrispyLeaves98]

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?

Id of course buy a new cylender. Something that I have been looking at is a mineralli 50cc they are cheap

 

[CrispyLeaves98]

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?