Motorized bike question

[Alsfelt]

I'm getting close to ordering a motor kit but I have a fuel take question. Does the fuel supply have to be located above the carb? Meaning does the carb pull enough vacuum to bring fuel up if the bottom of the tank is lower than the carb. Got a couple ideas for a tank that is located lower on the bike.

 

[deven_science]

I'm not really a small motor guy, but I know that for motorcycles, it is gravity fed. Rooke custom bikes have the tank under the seat, and they have to have a fuel pump.

 

[slowriderz]

the little kit motors will not run with fuel supply under the carb. Deven is correct that it would need a pump.

 

[Alsfelt]

Dang that sucks. I really don't want to put a tank on my top tube. Maybe I can do something on a rear rack that will look ok.

 

[wheelbender6]

Engines with a diaphram carb, like the 4 stroke 49cc Huasheng, and most weed eater motors, will suction fuel into the carb. The HT (China Girl) 2 strokes require that the tank be mounted above the carb,

 

[SSG]

You can use a small "vacuum" fuel pump. A lawn mower shop should have one for $10-15.

 

[Sosume]

If you go electric you don't need a carb or gas tank.

 

[Moisstink]

I used a tank that mounts behind the seat. You can find these pretty easy on ebay. The tank is the round tube under the seat with the straight shot aluminum tube to the carb. The silver canister above the engine is a boost bottle that does not do too much besides look kinda cool. The tank is a little smaller and has about a eight mile capacity.

 

[Alsfelt]

I used a tank that mounts behind the seat. You can find these pretty easy on ebay. The tank is the round tube under the seat with the straight shot aluminum tube to the carb. The silver canister above the engine is a boost bottle that does not do too much besides look kinda cool. The tank is a little smaller and has about a eight mile capacity.

This is kinda what I had in mind. I originally wanted to build a tank between the down tube and the rear wheel but I guess the rear tank might do.

 

[tanksalot]

You could put a tank inside a old school lunch box & put it on a rear rack .. I thinking about doing that for a build I have in mind.

 

[Bike Bum]

Here is how my dad did his gas tank. It works great too.

 

[j.sutterfield]

 

[LandSpeedRecord]

If you want help setting up a tank below the carb on a China motor message me I can help.