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49cc Parts

 

49cc Jackshaft & Clutch Assembly
Code: 12140
Price: $155.00
Available for delivery
Quantity in Basket: none
This jackshaft assembly is designed to transfer the power from a 49cc engine to the rear wheel of a motorized bicycle. Fits Honda GXH50 and the HS 49cc (clone) engine with keyed 5/8" shaft. Price includes complete jackshaft assembly, 10t clutch for #41 chain, #35 chain for input side, #35 master link, 10t engine sprocket, 33t input sprocket and mounting hardware. You will need a chain guard and the #41 secondary chain. We use a 56t wheel sprocket for an overall gear ratio of 18.480:1 which gives us a 31mph top speed.

High Flow Air Filter Element
Code: 10510
Price: $7.00
Available for delivery
Quantity in Basket: none
This high flow air filter fits in the stock air filter box. UNI makes the highest quality air filters that flow many times better than stock air filters. With this additional air entering the combustion chamber you will need to add more fuel as well. Drill the main jet with a #72 drill bit (.025") for the additional fuel. The bigger air/fuel charge will create more power in your 49cc motor. See our how-to section for more details on this product.

UNI High Flow Air Filter & Adapter
Code: 10530
Price: $32.00
Available for delivery
Quantity in Basket: none
The ultimate in high flow air filters. This kit includes our billet aluminum adapter which eliminates the stock air filter box. Two stainless steel bolts are included for mounting the adapter. Drilling the main jet with a #71 drill bit (.026") is necessary in order to increase fuel flow. The filter can be used as it is supplied in this kit or it can be trimmed down for limited clearance applications.

UNI Breather Filter
Code: 10540
Price: $15.50
Sorry, we are currently sold out of 'UNI Breather Filter'. Please check back later.
Quantity in Basket: none
This breather filter fits the 49cc, 79cc & 99cc 4 stroke motors. Use when the stock air filter box has been removed. The UNI filter plugs into the breather tube that normally goes into the stock air filter box.

Header Flange for the 49cc Engine
Code: 10600
Price: $7.50
Available for delivery
Quantity in Basket: none
Build your own header using our laser cut flange. The center bore is 3/4" to be used with 3/4" OD header tubing.

49cc 4-Stroke Carb Bored & Reworked
Code: 10460
Price: $69.00
Sorry, we are currently sold out of '49cc 4-Stroke Carb Bored & Reworked'. Please check back later.
Quantity in Basket: none
This is a stock 49cc 4-stroke carb that has been bored and reworked. Has a larger .478" bore (stock bore is .425"). Circuitry has been reworked. Throttle shaft and butterfly have been modified. Expect quicker revs and more power in mid range to top end. Uses stock return spring so no throttle linkage is required. Our suppliers are always out of stock on these carbs. Send us your carb to be bored and reworked. We charge $45 plus the return shipping.

Big Bore Carb .457"
Code: 10670
Price: $38.00
Sorry, we are currently sold out of 'Big Bore Carb .457"'. Please check back later.
Quantity in Basket: none
This big bore carb is an excellent upgrade for the 49cc motor. The stock carb has a bore of .425". The .457" bore on our carb allows a higher volume of air and fuel into the motor. Must be used with our high flow UNI filter and adapter kit (1504). A throttle linkage kit is also required. This carb will provide more power and quicker revs to redline.

Main Jet
Code: 12180
Price: $6.00
Available for delivery
Quantity in Basket: none
This main jet fits our big bore .457 carb. These jets will not fit the stock GXH50 carb or the stock HS carb. Choose from the following sizes: 50, 52, 55, 58, 60, 62, 65 & 68. The stock main jet in the .457 carb is a 60 and works great in most applications.

Throttle Linkage Kit for 49cc Engine
Code: 26270
Price: $17.50
Sorry, we are currently sold out of 'Throttle Linkage Kit for 49cc Engine'. Please check back later.
Quantity in Basket: none
This throttle linkage kit works on the 49cc 4 stroke engine when using our big bore carb (2707). This is a bolt on throttle linkage made from laser cut stainless steel.

High Grade Bolt Kit
Code: 26210
Price: $7.00
Sorry, we are currently sold out of 'High Grade Bolt Kit'. Please check back later.
Quantity in Basket: none
The 49cc engine comes weak grade 5 bolts that stretch and strip when put under too much pressure. Our high grade bolts are much stronger and better suited for a high rpm engine. This kit include hardware for the engine side cover, valve cover and exhaust.