Emcee
Active Member
- Local time
- 10:32 PM
- Joined
- Jul 12, 2022
- Messages
- 210
I wanted to run the bike on a few more tanks of gas before making this post but the time has come.
I can only get to 23 MPH WOT. I am on my 6th or 7th tank of gas. I have a stock NT Carb, 80cc engine and am using the stock 44T sprocket. The bike has 26 inch wheels running 26 x 2.125. I run 93 using Lucas at 32:1. I'm roughly getting 70MPG, I weigh 220. I thought maybe I wasn't getting enough air so I drilled a few holes in the filter two tanks ago and it didn't help.
The land elevation is 505ft where I live. Lowest I go to is 398ft, so average 452ft.
The thing that scares me is how high im revving is just to get to 23MPH. I don't want to fry my engine.
I'm not sure where to begin troubleshooting. Any help will be greatly appreciated.
UPDATE :
Got my tach today and here is what I'm reading. I pulled my spark plug out and it was very rich and fouled. Moved the needle to the 1st notch and my engine is responding well to that and to the 90 Octane ethanol free I put in. Top speed is still 23 mph
When I spray the carb where it meets the intake manifold it stalls out. Sprayed it on the intake manifold where it meets the engine and it's fine.
That weird square bolt and Phillips head that tightens it, should I replace it with something better like a hex bolt and nut?
1690 idle
2190-3100 RPM 10mph
4100 RPM 15mph
5100 RPM 20mph
SECOND UPDATE :
So I sealed off the air leak, it preforms better. It would make that sound but not anymore. Instead of stalling the RPMs would drop from 1650 to 1630 slowly so I'm not sure if some of it is going into the air filter.
Still can only top at 23 MPH. It just sounds horrible, unless the engine sounds that way at higher RPMs. Tomorrow I'm going to put my old exhaust on to see if that is creating some sort back pressure problem. I have the viper flex exhaust on it. In addition, I am going to follow what someone else did when this same issue happened to them and I'm going to see what happens. I have an extra carb I can bend the arms on. I'm not exactly sure what happens mechanically that could help it, but I love learning in the process of it.
I can only get to 23 MPH WOT. I am on my 6th or 7th tank of gas. I have a stock NT Carb, 80cc engine and am using the stock 44T sprocket. The bike has 26 inch wheels running 26 x 2.125. I run 93 using Lucas at 32:1. I'm roughly getting 70MPG, I weigh 220. I thought maybe I wasn't getting enough air so I drilled a few holes in the filter two tanks ago and it didn't help.
The land elevation is 505ft where I live. Lowest I go to is 398ft, so average 452ft.
The thing that scares me is how high im revving is just to get to 23MPH. I don't want to fry my engine.
I'm not sure where to begin troubleshooting. Any help will be greatly appreciated.
UPDATE :
Got my tach today and here is what I'm reading. I pulled my spark plug out and it was very rich and fouled. Moved the needle to the 1st notch and my engine is responding well to that and to the 90 Octane ethanol free I put in. Top speed is still 23 mph
When I spray the carb where it meets the intake manifold it stalls out. Sprayed it on the intake manifold where it meets the engine and it's fine.
That weird square bolt and Phillips head that tightens it, should I replace it with something better like a hex bolt and nut?
1690 idle
2190-3100 RPM 10mph
4100 RPM 15mph
5100 RPM 20mph
SECOND UPDATE :
So I sealed off the air leak, it preforms better. It would make that sound but not anymore. Instead of stalling the RPMs would drop from 1650 to 1630 slowly so I'm not sure if some of it is going into the air filter.
Still can only top at 23 MPH. It just sounds horrible, unless the engine sounds that way at higher RPMs. Tomorrow I'm going to put my old exhaust on to see if that is creating some sort back pressure problem. I have the viper flex exhaust on it. In addition, I am going to follow what someone else did when this same issue happened to them and I'm going to see what happens. I have an extra carb I can bend the arms on. I'm not exactly sure what happens mechanically that could help it, but I love learning in the process of it.