Honda PA Parts

Replacement Parts

A number of parts remain available - but - it seems that not all local Honda shops can get them. SUPPORT YOUR LOCAL HONDA SHOP IF POSSIBLE! Otherwise, try these sources:

Western Hills Honda Yamaha

Temecula Motor Sports


Carb Jets

If you are running a stock Hobbit, then changing your jets may not be necessary. If you are performance minded, then this information is for you. Fortunately for us - the main jet on your hobbit is also the Air Bleed Jet on Keihin FCR carbs. That means that these jets are available. Not only that, but these jets are also used in Honda lawnmowers.

The jets come in sizes of 2 and 3. Here's what I mean. The stock PA50I used a 60. Up from there is a 62, then 65, then 68, then 70, then 72, then 75, then the stock PA50II jet (a 78), etc. Jets are available from 48 up to 150. The jets are stamped with their orifice size.

The Honda part numbers are 99101-124-0600 (for a 60) OR, the FCR part number is 99101-ZF5-0600.

If you are looking to purchase different jets. Here are a few web stores. - A place mentioned on the forum a lot. To find a jet , punch in the Honda part number above (Must have the dashes also) and change the 60 to what you want. They only go up so far though. Example: 99101-124-0780 for a 78 - Thanks to User: 'deckard' Sorted by carb type. Match the part number. These folks also have cheap clone jets for the stock Keihin Hobbit carbs.

CDI Unit

The following CDI Units, from other Honda's will fit and work in your Hobbit:

  • 1981
    • NA50 Express II
    • NC50 Express
    • NX50M Express
    • PA50II
  • 1982
    • NC50 Express
    • NU50 Urban Express
    • NU50M Urban Express Deluxe
    • NX50M Express
    • PA50II
  • 1983
    • NC50 Express
    • NU50 Urban Express
    • NU50M Urban Express Deluxe
    • PA50II
    • NH80 Aero
  • 1984
    • NN50 Gyro
    • NH80 Aero
    • NH125 Aero
  • 1985
    • NH80 Aero

Exhaust Gasket

I don't buy Honda parts - I just go to ebay for these. I usually do a search for "50" and "exhaust gasket". As long as the gasket is copper and about 1-1/4" across, it will usually work. Here's a pic from ebay:

Exhaust gasket for PA50.jpg

Head Light has a headlight with a replaceable bulb. Headlight link

Petcock has a petcock. Petcock link

Spark Plugs

  • PA50I 1978 to 1980 (Gap 0.024 to .028")
    • NGK BP5HS (OEM) Found listed under NGK 4111 at Oreilly auto parts and Napa but has BP5HS on auctual plug
    • Optional per Owner's Manual and Honda Parts Manual: BP5HS
  • PA50II 1978 to 1980 (Gap 0.024 to 0.028")
    • NGK BP6HS (OEM)
    • Champion RL86C or L86C
    • ND W20FPR
    • Optional per Owner's Manual and Honda Parts Manual: BP5HS
  • PA50II 1981 to 1983 (Gap .030")
    • NGK BPR-6HS (OEM)
    • Champion RL87YC or L87YC
    • ND W20FPR
    • Optional per Owner's Manual and Honda Parts Manual: BPR-5HS

As a preface, I’m not THE expert on plugs. I can share what I’ve read (assuming that they were THE experts).

A resistor plug causes the spark to change in two ways: intensity and duration. If you have an ignition system, and compare the two plugs, both will spark – no doubt about that. The intensity of the spark (blue, blue orange, orange) can change. If you had the equipment to measure the amount of time that the spark is bridging the gap (like in microseconds), the time is shorter with a non-resistor plug, and longer with a resistor plug. In addition, the “peak” current will be greater in a non-resistor plug, and less in a resistor plug.

The purpose of the resistor plug is to reduce radio interference. My guess is that the stock CDI system produced such a larger impulse, that the resistor plug was needed to keep the radio interference down.

So, what’s the answer - what plug do I use? The simple answer I guess is that BOTH types of plugs will work (in that, they will provide a spark and ignite the air-fuel mixture). For my bikes, I will try to match the OEM plug to the bike. If I’m in a pinch, and they don’t have a non-resistor plug (my bikes are points bikes), then I’ll buy a resistor plug to get me back on the road – and will most likely get the “right” plug later. What you do is up to you. I doubt you’d notice a difference either way.

"V" Belt

Courtesy of

  • The OEM belt length measured on the top side (outside diameter) is 41 inches (104.14 centimeters)
  • The top and sides of the OEM belt (width) each measures 19/32 inch.
  • The bottom width of the OEM belt measures 11/32 inch.
Source Model Approx. Price Comments
Mitsuboshi (OEM) 23100-148-7030 $60.00 Available via Honda dealers
Dayco #17415 or
$12.00 It is a 41.5" belt, slightly larger than stock
  • I have tried the Dayco belt, and it does work. However, after a few hundred miles, the belt was showing signs of wear. I suspect that the belt angle (the angle of the "V") is slightly different. The point --> don't expect the belt to last as long as a stock belt.

Wheels & Tires

Tire and wheel replacement

Pedal Crank and Sprocket Dimensions


Honda PA50 Information
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