Hi, I just got a 80cc bicycle engine kit. I assembled the whole thing onto a beach cruiser. There is gas in the bowl and I have a spark but the bike won't start. If I give it full throttle while I pedal it will pop on and off (just for a moment) but won't stay running. Any ideas what's wrong with it?
Bike Won't Start
- Thread starter hserro1221
- Start date
Timbone
Well-Known Member
Don't give it full throttle! Sounds like it wants to run, probably just needs the right mix of fuel and air flow. Check your fuel flow - make sure there isn't a vapor lock or anything hindering flow. And just barely move the throttle input. Too much air may be preventing the engine from getting a good pop.
It's as much art as science!
It's as much art as science!
hserro1221
New Member
- Local time
- 9:47 AM
- Joined
- Mar 19, 2015
- Messages
- 2
How many screws out should my air screw be?
Timbone
Well-Known Member
Idle screw on the NT carb? 3 1/2 turns out is the rule of thumb.
KCvale
In memory of KCvale 1959 - 2019
Get real torque wrench and tighten your head 20#, 5# at a time in an X pattern.
It takes Spark, Fuel, and Compression to run, you have 2 of the 3.
It takes Spark, Fuel, and Compression to run, you have 2 of the 3.
dougsr.874
Active Member
- Local time
- 10:47 AM
- Joined
- Sep 15, 2008
- Messages
- 570
I assume this is a new engine...so place choke lever in full up position...pedal & try to start,,,then lower choke lever to full down position..then pedal & try to start again..chances are it will start then...after engine is broken in or is warm choke will not be necessary
