1979 Honda hobbit pa50II issues!

Michael Phipps /

Aloha! My Moped Army friends. I'm having some interesting issues with my 1979 Hobbit custom build. I'm looking for advice and maybe someone has done this.

Engine is stock PA50 II. I've added boyesen dual stage power reeds "STOCK" for pa50,

mikuni 20mm VM round slide carburetor, and a HPI CDI mini rotor ignition.

I'm having a heck of a time getting the HPI CDI ignition timed correctly! The instructions suck! Any help or advice would be greatly appreciated.

When I eventually get it to run, it runs great for awhile. Then it floods out and dies.

I have awesome spark, great compression and lots of fuel.

Any tips or help is greatly appreciated!

Thanks in advance!

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Re: 1979 Honda hobbit pa50II issues!

Michael Phipps /

Hmm?

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Re: 1979 Honda hobbit pa50II issues!

if it floods out, hard to restart then its your carb, new plugs are nice n cheap and not fouled

Re: 1979 Honda hobbit pa50II issues!

I bet it has lots of fuel!! Did I read that right? a 20MM carb on a stock bore.

Re: 1979 Honda hobbit pa50II issues!

Michael Phipps /

I get that, but it ran great with points for a long time, lots of power and started up first kick.. Then it started having issues (with points). Hard starting, flooding...Then dying. I've taken the carb apart and you could eat off of it! Super clean. I'm wondering if it's the reeds?

Re: 1979 Honda hobbit pa50II issues!

Michael Phipps /

Yes, 20mm. But it ran great for a long time. (edited)

Re: 1979 Honda hobbit pa50II issues!

Copy that. Treat that carb to a new float valve. Check float height, check that float actually floats and does not have gas inside it.

Re: 1979 Honda hobbit pa50II issues!

Michael Phipps /

Roger that! I've already done that. It's all good. Scratching my head!

Re: 1979 Honda hobbit pa50II issues!

Nice ride!

Re: 1979 Honda hobbit pa50II issues!

Michael Phipps /

Anyone have experience with the HPI CDI ignition?

Re: 1979 Honda hobbit pa50II issues!

Michael Phipps /

Someone has had to have installed an HPI CDI into a Hobbit. Looking for pointers! HELP

Re: 1979 Honda hobbit pa50II issues!

Folks will be able to help you out more if you post your jetting here.

If you haven't changed the jetting, you are going to be excessively rich because the carb comes with a 180 main jet.

Re: 1979 Honda hobbit pa50II issues!

Michael Phipps /

It's all stock jetting. What main would you recommend?

Re: 1979 Honda hobbit pa50II issues!

I'm shocked the bike even runs with the jet that high on a stock bore. You likely need to be in the 75-85 range.

Re: 1979 Honda hobbit pa50II issues!

oh my holy heck, much downjet needed.

also up top of the thread theres a menu bar with an option to "view threaded" that makes reading this site legible. Everyone uses that and it helps readability.

Our friend woody did a similar top tank setup. It was neat.

I'm surprised you went with an HPI but still no kit.

Do you have a timing light?

use a timing light to see actually hwere the HPI is firing, and then adjust per their instructions.

Re: 1979 Honda hobbit pa50II issues!

Michael Phipps /

The consensus seems to be the carb is to big. I've decided since I'm building a custom Hobbit, might as well upgrade the engine. Any suggestions on a larger cylinder kit? I was looking at this one;

http://www.mopeddivision.com/honda-pa50-hobbit-express-athena-73cc-47-6mm-cylinder-kit/

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Re: 1979 Honda hobbit pa50II issues!

Michael Phipps /

Let the transformation begin!

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Re: 1979 Honda hobbit pa50II issues!

> Michael Phipps Wrote:

> -------------------------------------------------------

> The consensus seems to be the carb is to big. I've decided since I'm

> building a custom Hobbit, might as well upgrade the engine. Any

> suggestions on a larger cylinder kit? I was looking at this one;

>

> http://www.mopeddivision.com/honda-pa50-hobbit-express-athena-73cc-47-6mm-cylinder-kit/

The consensus was that you need to tune your carb.

That being said, it is a little unusual to have such a large carb on a stock cylinder. Everyone here will recommend the DR as the ultimate hobbit easy mode kit.

Worth the rebuild with the performance crank if you haven't already. You will bend the stock crank running the kit.

Re: 1979 Honda hobbit pa50II issues!

Michael Phipps /

Thanks for the advice. It is much appreciated.

Re: 1979 Honda hobbit pa50II issues!

Michael Phipps /

Hmmm..

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Re: 1979 Honda hobbit pa50II issues!

DrGeorgeTompson (Alan) /

I liked the wizard kit. So many ports. That thing was pretty nice for the 2 miles i rode it. Then it got stolen. Must've been too fast idk

Re: 1979 Honda hobbit pa50II issues!

> Travis Tutorial Wrote:

> -------------------------------------------------------

> Worth the rebuild with the performance crank if you haven't already. You

> will bend the stock crank running the kit.

If you're lucky you'll just bend the crank. Usually the crank snaps clean off and the variator flies into oncoming traffic, which has happened to me and many others. Upgrading the crank is a must.

Re: 1979 Honda hobbit pa50II issues!

Michael Phipps /

Good to know! Thanks

Re: 1979 Honda hobbit pa50II issues!

Charles Cole (OFMC) /

With very little digging, you'll find a multitude of Hobbit building, in threads or in the WIKI.

Re: 1979 Honda hobbit pa50II issues!

Malachi Moser /

I have the airsal 70cc kit but i have my own issues, I myself cannot get enough fuel where you seem to be getting too much lol.

Re: 1979 Honda hobbit pa50II issues!

My variator snapped the crank clean and shot through the plastic cover blistering down the street at like 10K rpms. I was V lucky there was no oncoming traffic.

Re: 1979 Honda hobbit pa50II issues!

Is parka kit or polini an option?

Re: 1979 Honda hobbit pa50II issues!

Meant Parma kit, fuckn screen savers

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