still dont get up even a little incline what am i doing wrong?

[gill vanderwerf]

almost got trough my first gallon of fuel but still don't go faster then maybe 10 mph and forget even going up a small hill i have to get off the bike and walk up. its a 49 cc motor so am i just screwing up because i see other people on a motorized bike flying up the hills around here.

 

[Greg58]

Gill you will learn how to make the bike better by reading all you can here on the forum. Just about everyone has some kind of problem when they start. If your engine is new it will get better after break in, it may take 200 miles. I would check the head for flatness and look for air leaks, also try running without the muffler end cap as a test. You can find out a lot by experimenting.

 

[Greg58]

Did you repair or replace the bad cylinder stud? It will not run better till you do.

 

[gill vanderwerf]

yes i did greg

 

[Greg58]

Did you try removing the muffler end cap and do a test run? If it’s running too rich that will help, a lot of the new mufflers are very restricted, they have a series of baffles in them. A good pipe makes a world of difference.

 

[gill vanderwerf]

ok i will try that today also i was told to clean the carburetor and bend that float thing a bit inside because it still drips out of air filter

 

[Greg58]

This thread should help with the carb.

https://motorbicycling.com/threads/motorized-bicycle-carburetor-install-and-rebuild.302/

 

[gill vanderwerf]

well i took off that end cap from exhaust and cleaned carburetor, i think i got a bit more speed but it still stalled at 1/2 up the hill in front of my house like it did before.

 

[Greg58]

What fuel mixture are you using? 24/1 is what I have found to be good for a new engine, I switch to 32/1 after about 200 miles.

 

[waynesdata]

This setup will make you bike run rich on flats and come into power going up VERY steep hills.

Remove the baffle inside the muffler
Switch to 32:1 fuel oil
Move the needle clip on NT carb down one notch.

 

[gill vanderwerf]

What fuel mixture are you using? 24/1 is what I have found to be good for a new engine, I switch to 32/1 after about 200 miles.

i use the 16.1 mix with 93 premium gas 16.1 mix was recommended in book i got with motor. 2 tanks of that and then a 8 oz per gallon mix

 

[gill vanderwerf]

This setup will make you bike run rich on flats and come into power going up VERY steep hills.

Remove the baffle inside the muffler
Switch to 32:1 fuel oil
Move the needle clip on NT carb down one notch.

whats a baffel....lol baffeled by this one

 

[Greg58]

With the end cap off of the muffler look inside, most have a baffle. One of the newer mufflers I have had the stinger going from the cap down over half way through the muffler. I cut the tube off just inside the cap.

 

[Greg58]

It’s like blowing air through a 12 inch straw vs a 3 inch, the restriction is reduced.

 

[gill vanderwerf]

It’s like blowing air through a 12 inch straw vs a 3 inch, the restriction is reduced.

ok i will take it off today and see if i can remove it.

 

[gill vanderwerf]

oh and while i got you here Greg can i pick your brain on something else also? can a motor get a slipping clutch because the angle its mounted on is not right.. i was reading something cant remember where but a guy had a slipping clutch and tried all kinds of stuff untill someone said something about the angle that the motor was mounted on. might just be a fairy tale

 

[Greg58]

8 oz. per gallon is way more oil than you need, I run mine at 4oz to a gallon or 32/1 after break in. I’ve been running that mix since 2011 with good oil for air cooled engines.

 

[Greg58]

Not on this type engine, a internal clutch is not affected by the engine angle.

 

[MotorBicycleRacing]

i use the 16.1 mix with 93 premium gas
16.1 mix was recommended in book i got with motor.
2 tanks of that and then a 8 oz per gallon mix

16 to 1 mix is 8 oz of oil per gallon.
How much oil were you adding at 16 to 1?

 

[gill vanderwerf]

16 to 1 mix is 8 oz of oil per gallon.
How much oil were you adding at 16 to 1?

yes the 16/1 mix