So Who's Building Performance HT Bicycle Engines.....

Allrighty,


I am to the point where I want to squeeze out some more juice out of the Happy Time motor.
I've read this and that, here and there on what to do for more low end torque and top end speed.
The little engines are all there basically, and just need minor improvements to hop them up a bit.

So who's had success in tearing down, modifying and rebuilding these engines for utmost performance,what was addressed, and wouldn't it be nice if someone offered this service?
See most of us don't have the tools or time to do the "drawing board experiments" on our motors. I wouldn't do that to my car engine myself either. I leave that to someone who lives around engines all day.

My goal on this thread is to fish out what works, what doesn't, and maybe find someone who performs this Hi-Po service for a fair price so I can get engines from them. I could take the time and R&D this myself, but I have too much on my plate with the rest of my builds. I would love to find someone who could sell me an engine that has a clean balance, great low end torque, high end revs, and a smooth power band. I believe this can be done and still leave the engine reliable.

I know of one engine dealer in Austrailia, Rock Solid Engines, a sponsor here on this forum, that is now armed with a "Dyno". The feedback from this equipment is going to cause major advances in this little engine over time as they experiment with changes and test them, and I can't wait to see what transforms.

I would like to know if anyone here in the States has played with these enough to know what works and what doesn't internally and externally, and is there anyone who'd like to build me a motor from their tried and true experience?

Maybe this sort of information sharing will bring more advances to the HT engine...who knows.

Ride On!
'BrettMavriK

Re: So Who's Building High Performance HT Engines.....

Yes, Chris his has built a good market for himself,
but I am looking for more than a meager "clean and check" with new bearings and gaskets for $350.
Nothing wrong with what he does, and people do pay him for that, and get a 1 year warranty.

I'm talking about Major Porting and Port Timing Mods;
New Head Designs Maybe, Remade Pistons, Crank Balancing,
and the like.

Something that takes the motor to the next level; as if you put a
nice "street cam" into an automobile engine for more performance with minimal loss
of longevity.....

Re: So Who's Building Performance HT Engines.....

Awesome!

This is the kind of forward thinking I'm talking about...

Good read!

Re: So Who's Building Performance HT Engines.....

This thread is about the China HT Motors,
and taking them to a new performance level
through modifications.

I'd appreciate it if this thread didn't get hijacked
with talks of trying to use another engine type all together.
If you are curious, you can start another thread about using
dirt bike motors on bicycles, and you'll probably end up with much
debate.

Thanks,

Re: So Who's Building Performance HT Engines.....

This is the kind of homework I like to read about when it comes to the China Motors.
I believe you're onto something with the timing advance thing. I believe this motor is all there,
for the most part, if you get a GOOD motor to start with; they just need their internal
attributes tuned for performance.
I think China lost something along the way when they took this motor idea
from the Russians. I think the answer to these motors putting out some better power
is right under our noses. I think it's a mild mixture of some internal attribute changes.
Timing is huge.....

Unleash The Hounds....!!!

=-]'

Re: So Who's Building Performance HT Engines.....

Exxxcellennnt......

Re: So Who's Building Performance HT Engines.....

Kewl, you are close!
Have you built up a motor yet?
I sure would like to test one before I buy one.
That would tell me if my path will stay with HT's or
make the jump to Morini's.