Custom Motored Bicycles

UPGRADED AIR FILTERS,CHROME STACK,Low Profile CHROME, Low Profile RED,low profile BLUE for NT Carburetors or SHA 60mm Carburetors.Better air flow into the carburetor.Low Profile size 3 1/2 inch diameter,1 1/4 tall,great performance for the space limited builds. For NT,NT Speed carbs and SHA 60mm carbs.Can be cleaned and oiled,like K&N filters.
Please email for your style of carb and color or chrome stack for NT will be sent by default.$16.00 choose 1

SHORT ALUMINUM INTAKE MANIFOLD,Great for longer carburator clearance issues. CNC milled to match intake port.May have to shorten clutch cable fulcrum on motor because carb will sit lower.Fits standard intake bolt pattern of studs being 24.2mm apart.Made in the USA!

Port matched
Straight Shot
O-ring Seal
WILL NOT WORK ON THE GRUBEE MOTORS WITH THE 40MM Intake Stud spacing.$20.00 FREE SHIPPING

SPEED SQUARE BOX CARBURETOR WITH SHUT OFF, has white shut off lever on side prevent overflows, may have larger jet.Has idle screw, primer button, air ram air filter.3 inches long,2 1/4 inches wide,3 7/8 inches high,weight 8.8oz.$26.00

UPGRADED SPEED CARBURETOR WITH CHROME AIR FILTER and SHUT OFF, has white shut off lever on side prevent overflows, may have larger jet.Idle screw, primer button, Chrome CNS Stack filter for more air flow.3 3/4 inches long,3 inches wide,3 7/8 inches high,weight 10.4oz.$40.00

STOCK CARBURETOR,NTTC brand,comes in most motor kits,has idle screw primer button air filter.3 inches long,2 1/4 inches wide,3 7/8 inches high,weight 7.6oz. $19.00  replacement carb float and idle screw below.

CARBURETOR FLOAT DONUT,sometimes these are cracked and take on fuel,causing fuel to leak out of your carb. New stock replacement for NT carburetor,30.5 mm outer diameter,center hole 9.5mm and 15.5mm thick.$4.50

GRUBEE YD CNS CARBURETOR,choke cable and lever for on the handlebars, adjustable carburetor made by YD factory for 66cc engines.$44.99

                                                            choke on, instead of restricting air)

SHA CARBURETOR,does not include special length throttle cable.CNS style air filter,has choke lever on right side of carb. Auto off choke when throttle is turned. Very smooth throttle response.Dellorto clone,flat slide, parts should be interchangeable.4 inches long ,2 3/4inches wide,4 7/8 inches high,weight 14.4 oz. The scale of this carb is more compact due to the flatslide throttle and short float bowl. This carb is a great match size wise to the china 14mm carb but its a more tunable and more reliable carb. Smaller float bowl means no cutting of the clutch cable fulcrum nut when using a performance straight shorty aluminum intake.
Auto choke is activated by proper throttle tensions. A full turn of the throttle releases the choke and ensures proper cable tension when installed correctly. This also ensures that you are achieving a W.O.T. in-turn.
A great replacement carb upgrade for the Chinese bicycle motor.
Filter included
Lever Choke
14MM barrel size
14mm choke size
Idle circuit drawing mixture from main jet
Flat throttle slide gives nice compact design
Semi-automatic strangler starting system
19MM Clamp on connection
This Carb can easily be re-jetted to compensate for any climate changes, elevation changes, and/or Performance upgrades you may add down the road.No Returns on this carb.Does Not include special length throttle cable.$49.99

Metric M5 jets available$4.00 each sizes M5 80,75,70,65,60.

Email to order jets,Lynn@CustomMotoredBicycles.com with your address and jet size you would like.

SHA CARBURETOR WITH THROTTLE CABLE,has choke lever on right side of carb. Auto off choke when throttle is turned,includes proper length 155mm draw throttle cable and CNS style air filter,3  5mm jets #75, #70and #65.Very smooth throttle response.Dellorto clone,flat slide, parts should be interchangeable.4 inches long ,2 3/4inches wide,4 7/8 inches high,weight  14.4 oz. Call 414-732-0017 with any questions.$69.00

No returns on this Carb.This carb set up includes throttle cable and 3 jets #75,#70#65.

A great replacement carb upgrade for the Chinese bicycle motor.
Filter included
Lever Choke
14MM barrel size
14mm choke size
Idle circuit drawing mixture from main jet
Flat throttle slide gives nice compact design
Semi-automatic strangler starting system
19MM Clamp on connection
This Carb can easily be re-jetted to compensate for any climate changes, elevation changes, and/or Performance upgrades you may add down the road.

Other Metric M5 jets available$4.00 each sizes M5 80,75,70,65,60.

Email to order jets,Lynn@CustomMotoredBicycles.com with your address and jet size you would like.



CARBURETOR IDLE SCREW AND SPRING,replace that lost or bent idle screw. Stock original size 22mm long. $4.50

ALUMINUM INTAKE MANIFOLD,stock aluminum manifold,can be ported.Fits standard intake bolt pattern of studs being 24.2mm apart. Standard 1 1/4 bolt pattern.$7.50

STEEL INTAKE MANIFOLD and gasket,standard size to fit most motorized bicycle engines. Stock manifold.Fits standard intake bolt pattern of studs being 24.2mm apart.Standard 1 1/4 bolt pattern.$7.00 

FLAT OFFSET INTAKE MANIFOLD,puts carb off to the left or right side of the seat post. Steel 4 1/4 inches or 107mm long. Fits standard intake bolt pattern of studs being 24.2mm apart.Comes with gasket,flange may need to be filed and cleaned up.Standard 1 1/4 bolt pattern.$15.00

OFFSET INTAKE MANIFOLD, puts carb off to the right side of the seat post. Steel 3 3/8 inches or 87mm long. Do not have to shorten clutch cable fulcrum.Fits standard intake bolt pattern of studs being 24.2mm apart.Standard 1 1/4 bolt pattern.$17.00

STOCK AIR FILTER,for NT carb,screws 38mm apart. Ram Air style!!$6.00