OKO K-101 19mm-30mm Parts Breakdown
1-      Carburetor Body              $20.00        
2A    Complete Choke               $6.00
2B    Cable Pull Choke             $10.00    
3-      Float                                    $15.00                       
4A-   Float Bowl, Metal              $10.00     
4B-   Float Bowl, Clear              $15.00      
5-      Float Bowl Gasket           $5.00      
6/7    Drain Plug w/O Ring        $7.00                
8-      Float Needle w/Clip         $5.00    
9-      Jet Block w/Gasket          $20.00                     
10-    Pilot Jet                              $6.00                       
11-    Needle w/Clip                    $8.00             
12-    Needle Clip                        $0.50                 
13-    Throttle Valve/Slide         $15.00   
14-    Jet Block Gasket              $1.00        
15A- Top (Straight )                   $5.00           
15B- Top (Curved)                     $10.00         
16-    Top Gasket                        $1.00                 
17-     Air Screw w/Spring        $4.00                 
18-    Spring                                 $1.00                         
19-    Slide Spring                      $5.00             
20-    Float Needle Clip             $1.00      
21-    Float Bowl Screws (2)    $1.00
22-    Vent Hose, Long              $2.00          
23-    Vent Hose, Short             $1.00        
24-    Float Pin                             $2.00                       
25-    Vent Hose Clip                 $0.50          
26-    Main Jet                              $5.00
27-    Cable Adjuster w/Nut      $5.00        
28-     Nut                                      $1.00          
29-     Idle Screw  Complete     $4.00
30-     Spring w/Washer            $2.00       
31-     Needle Holder                 $3.00                    
32-     Top Screws (2)                $1.00                         
33-     Washer                              $0.50                
34-     Needle Jet                        $4.00                          
35-     Main Jet Holder               $12.00             

In the text box below, list the numbers or names of the parts you want and the quantity.
In the text box below, choose the size carburetor parts are for.
Place your  e-mail address and country parts are to be shipped to in the box below and I will send you a price quote.
Use the text box below for questions or details of your order.
OKO K-101 Clear or Metal Foat Bowl
OKO offers this clear float bowl for the K-101 series so you can easily check the float level, or see if any dirt or water has accumulated in the bowl.  It attaches with four screws (incuded).  It does not have the bottom nut for access to the main jet.  This may be purchased by itself or with a K-101 Carburetor kit.  Click on the "options" when ordering.
Clear Float Bowl Options
Carburetor Size
We have three kits for adapting flange mount manifolds for spigot mount carburetors and one sleeve for spigot to spigot mount.  #1 has 2" or 51mm bolt center spacing and is for 34-35mm carburetor spigots.  #2 has 60mm bolt center spacing and is also for 34-35mm carburetor spigots.  #3 has 60mm bolt center spacing and is for 40-42mm spigots.  #4 sleeve is for 33 to 35mm spigots and #5 sleeve is 39mm ID on one end and 33mm on the other
Manifold Adapter Kits
Rubber Manifold Adapters
Adapter Size:
Tygon Fuel Hose Kit
This kit includes one foot of 1/4 inch Tygon Fuel hose, which will not harden or get brittle, one 1/4" plastic/brass fuel filter and two sleeves for use when the hose is a loose fit .
Tygon Hose and Filter
UNI  2-Stage Foam Air Filters
We are offering two UNI 2 stage foam filters to fit the K-101 and K-104 series of carburetors.  Each are angled 15 degrees and are 4 inches in length.  K-101 Series is 2" inside diameter, K-104 Series is 2.5" inside diameter.  Select the right filter for your carburetor from the drop-down box.
K-101 Gaskets and Sets
This universal throttle cable kit from Venhill comes with everything needed to create your own custom throttle cable.   Outer housing and wire are over 4' long with an array of fittings.  Slide end is already attached and a solderless throttle end is included

Throttle Cable Kit Options
K-101 Needles
We carry several Needles for the K-101 series.  The stock needles for the various sizes from 30mm to 21 are available.  Note:  To date, we have used the 28mm, JJH needle for all applications from 21 to 28mm.  We suggest you try the JJH if you find the stock needle has too much taper, giving a rich mixture towards 3/4 throttle.
Main Jets
We carry a large selection of main jets from #95 to #180.  Ask us if the size you need is not listed here.
Slow Jets
We carry a large selection of slow or pilot jets, from #32 to #70.  Click the drop-down box to select the jet you need.
Needle With Shim
Needle Type
Slow Jet Options
Slow Jet Size
Size Needed
Main Jets
Main Jet Size
Other Size Wanted
Curved Top, Straight Top, or Gasket
This curved top for the K-101 is  sometimes the answer to limited space above the carburetor.  It uses slightly more free cable than the straight top.
Curved Top Options
Domino Throttles
There are three replacable rubber gaskets in the K-101 Carburetors.  One is for the float bowl, another is for the float bowl drain plug, and the third is for the jet block.  These are a good set of spares to have on hand.
Note: OKO has thickened the jet block gasket, eliminating early leakage problems of air and/or fuel from the float bowl.  A good seal here is imperative to get your OKO properly dialed in.
This is the Domino slow throttle used in  trials.  Kit includes a "set screw" throttle end to eliminate soldering. Choose either the "slow" or "fast" throttle.
Throttle Options
Slow or Fast Throttle
K-101 Gaskets
Parts and Accessories
K-101 Needle Shims
Venhill Universal Throttle Cable
Electrex World Electronic Ignition Kits
We now offer Electrex World electronic ignition kits for several Trials motorcycles as well as other bikes.  These are made in the UK and are of very good quality.    We can supply them for BSA, Bultaco, Fantic, Triumph and Yamaha Trials bikes as well as others.  Prices for Bultaco and Yamaha kits start at around $250.00.  Call for availability and prices.
Call Roger at 410-635-6722 or 443-821-6154.  Note:  We currently have a TY 250 kit in stock for $250 plus $10 shipping.
12mm  Petcocks
These have 12mm by 1.5mm threads and are used on many Spanish bikes as well as other European bikes.  We carry two versions, horizontal outlet and vertical outlet.  choose which you would like from the drop-down box
Needle Shims
Often, the best needle clip position is between notches, so we offer this five pack of shims.  One shim sets the needle height half way between notches
K-101 Slides/Throttle Valves
We carry replacement slides for the K-101 Series from 21mm to 30mm.  Select the slide from the Drop-down list. 
Note:  OKO does not use different cutaways as others do.  The bottom of the slide is made to match the profile of the jet block.
K-101 Slides
K-101 Carburetor Size
K-101 Jet Blocks
K-101 Main Jet Holders
Jet Block With Gasket
K-101 Carburetor Size
Main Jet Holder
Carburetor Size
Note:  Parts not listed here can be found at the bottom of this page.  We hope to add them here soon, but in the mean time you can order them using the text box in that area and we will send you a Paypal invoice which will include shipping.  As noted above, shipping will be free if parts and/or accessories are ordered with a carburetor or if the order totals $20.00 or more.  Orders under $20.00 will have a shipping fee of $5.00
Petcock Choices
We carry jet blocks for all sizes.  Not normally a wear item but can get plugged or damaged.  It comes with a jet block gasket as above on the right.
Main jet holders available in all sizes, from 19mm to 30mm 
We have not had any issues with floats, but have had requests for these.  They come with the float needle with the Viton tip.  Float leakage problems are mostly caused by wear or damage to the float needle tip.
K-101 Float and/or Needle
Float and/or Needle
OKO K-101 and K-104 Cable  Operated Choke
For bikes that have poor access to the regular pull choke, OKO has this conversion kit to change over to a cable operated choke.  Comes with a curved top, and we also can provide a straight top if desired.  We will soon be providing a kit that will include a Venhill universal cable and an alloy Domino choke lever.  For now, if needed we have the cable listed lower on this page.
Cable Operated Choke
If your carburetor has a thin jet block gasket, it should be changed to a thicker one, as the thinner ones are prone to leaking.
K-101 Air Screw
K-101 Idle Adjustment Screw
Fits all K-101s from 19 to 30mm.  Comes complete with spring.
Idle screws are different for different size carburetors.  Let us know what size you need it for, Comes complete with spring.
Air Screw With Spring
Idle Screw With Spring
Size of Carburetor
We carry and sell virtually every part for the K100 series of OKO carburetors.    Parts for the larger K-104 series are not yet listed, but all are available.  Contact us using the form at the bottom of the page for prices and availability.  Shipping is included for orders with carburetors, or those totaling over $20.00. 
Venhill Universal Clutch/Brake Cable
This universal cable kit from Venhill comes with everything needed to create your own custom front brake or clutch cable.   Outer housing and wire are over 4' long with an array of fittings.  Lever end fits three hole sizes and comes with an eight mm set screw barrel for the other end.
Clutch Cable Kit Options
Shipping Costs
USA buyers:  Select shipping cost of your order below.
Heat Block
Used on Many Spanish and British bikes that had AMAL MKI Concentric carburetors.  They are 1/2" thick and the bolt holes are 2" on centers, made for 5/16" or 8mm bolts.
Please Note:  
All parts orders shipped within the USA totalling less than $20.00 will require $5.00 for shipping.
USA buyers, please select the proper shipping cost with the shipping "Add to Cart" button to the right.
All international parts orders will be charged shipping according to the weight and type of package.  We will notify International buyers with a shipping cost via e-mail and send a Paypal invoice.
OKO K-101 and K-104  Pull Choke
This stock pull choke fits all K-101 and K-104 OKO carburetors, from 19mm to 40mm
Pull Choke Options
Needle Jets
We have needle jets for all
K-101 carburetors, from 19mm to 30mm.  Select the size from the drop-down box.
Needle Jet Prices
Select Carburetor Size
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Venhill Universal  Long Throttle Cable
This universal throttle cable kit from Venhill is 92 inches long and comes with everything needed to create your own custom throttle cable.   Slide end is already attached and a solderless throttle end is included.

Long Throttle Cable Kit Options