nik
Member
Well. where do i start. (deep breath)
hello............ motorizedbike forum peoples..
my name is nik (29yo). I love bikes. i love things that go fast.... and well..
I live in northcarolina.
I have never built anything like this! I have no real mechanic type experience, only limited info ive picked up.
please let me share what ive been through over the last month...
pics of my bike below
I saw a motorized bike in a youtube video and decided it was for me. two months later im mounting an (happytime dax 70) engine on a bicycle. It sounded like a fun project, which it has turned out to be.
However, it certainly has its share of frustration! I was able to mount my engine after finding a suitable frame that would allow the engine mounts to fit nice. I choose a cruiser frame (old school murray). (after realizing the mountain bike frame i bought would not quite work due to derailer interferance, i need a bracket to mount on mountain bike..ill do that later)
I had some issues installing the sprocket on a coasterbrake wheel, and decided to put on a freewheel instead (coaster brake.. aggh dust cover aghh. ), and mounted the sprocket on the freewheel. I did mangage to get the engine installed and running after a couple start attempts, the first couple times... then the fun began..
shut off the bike.
I notice that the fuel is leaking bad from the petcock..
The fuel petcock broke off when i tightened it (pot metal)! so i made a trip to a engine shop and got a nice replacement on/off and petcock (15$). Now, im ready to ride! So, I tweak the controls some and experiment with getting it to start.. I manage to get it start.. sometime. but after a half hour of riding and the bike sits off an hour, it does not want to start back up again. I thought maybe it was flooded,, so i took out the plug (wiped it) and walked the bike around,, and put the plug back in. . sometime this would work. sometime i would have to squirt a small amount of fuel in the spark plug hole to get the fuel going. ( i cant seem to tell if its too much fuel, or not enough.. although i try looking at the spark plug to see if its "wet", it kinda is not overly wet, but a little on the treads.
This whole story is long, so bare with me..
while checking spark plug..
My spark boot inside came out onto the spark and broke (brass piece and spring), so i went to the moto shop and got a ngk replacement (3.00$). nice. I decided to get a new plug to go with the new spark plug boot. (ngk b6hs)So I managed to get the bike started once, with the new boot (old plug z4c), after a half hour i turn off the engine and an hour later attempt to start.. nope. wont start.. why? then, I try to start in all ways, choke up, down etc. nope.
spark maybe?
I checked the spark plug boot and plug by riding bike along with plug out of engine while plugged into spark boot.. then allowed it(sparkplug) to touch engine block while i pedaled along.. i saw spark.. definately.;
so its not spark? right..?
magneto? i dont think because im getting a spark when plug is out of block.
it feels like when i go down a hill (let out clutch and peddle) that nothing is happening.. no spark> it wont pop.. which cant be. so i adjust choke up, down, nothing. i squeeze throttle some as well to test.. i looked at carb and adjusted needle notch settings.. nothing.. now it is not starting at all. 2 days
I am gettting so frustrated.. as many of you know
Im really stumped. I know the troubleshooting rundown, i havent had much luck with it. I need to triple check gaskets.. perhaps that is a problem,(air leak?) , but i am on my first gallon of gas/2strokeoil.
I rechecked all wiring and its good. kill switch works when engine is on, and needs to be shut off. its not the kill switch. i have even disconnected it to make sure.
and i havent driven the engine but maybe 10 miles max.
it drove fine when it started and ran, and did not let out to much smoke.. my fuel is 1 gallon to 6 oz of 2stroke oil
Im wondering if maybe the fuel line is creating a mild vaccum preventing free flow of gas into carb,, i read somewhere on here that a hole drilled in the top of the gas tank can eliviate vaccum in the line.
but, when i attempt to flood the bowl by pressing the tickler button for a couple times im sure there is gas because fuel wants to come out of the fuel bowl, it doesnt want to start. after i tried to open up the fuel bowl and let all of the gas out, empty, it still doesnt start. flood or to dry? rich or lean? nada.
I have adjusted the needle in the carb also, but putting it at different notches on the black washer. no luck at all.
I am aware that you need fuel, air and a spark.
which one am i not getting? the spark works when tested, but wont fire in the block. doh! no popping. doesnt even try to start.. just hear the chain turning the gear.
The gas/oil is in the line and full. The petcock (new) is open, and the (paper inline) fuel filter loaded up with gas/oil of course, and fuel bowl fills fine.
The choke is set into the up postion. to start, I have also tried bringing the choke down a little to allow more air in the engine,, no luck.
If i take the spark out and walk the bike with clutch out, the piston is pumping and making its "compression" noise. so, I think the engine piston is fine. (i also just tightened the head bolts yesterday a little to make sure) I do that to clear out any fuel in the block when i think its flooded. I just walk it for a couple minutes max, sparkplug out. To dry up some fuel.
I have enjoyed the couple times i was able to fire up the bike and ride it.. what a rush! and everybody who sees it says "whoa!, thats sweet!".. i like that.
I have also been reading the helpful posts on motoredbikes.com and they have helped. however, i am stumped
If anyone thinks they can help or would like to share please do. ride or die!
and thanks for having me in your forum. I am new so i apologize if i posted to much here
-nik in northcarolina
hello............ motorizedbike forum peoples..
my name is nik (29yo). I love bikes. i love things that go fast.... and well..
I live in northcarolina.
I have never built anything like this! I have no real mechanic type experience, only limited info ive picked up.
please let me share what ive been through over the last month...
pics of my bike below
I saw a motorized bike in a youtube video and decided it was for me. two months later im mounting an (happytime dax 70) engine on a bicycle. It sounded like a fun project, which it has turned out to be.
However, it certainly has its share of frustration! I was able to mount my engine after finding a suitable frame that would allow the engine mounts to fit nice. I choose a cruiser frame (old school murray). (after realizing the mountain bike frame i bought would not quite work due to derailer interferance, i need a bracket to mount on mountain bike..ill do that later)
I had some issues installing the sprocket on a coasterbrake wheel, and decided to put on a freewheel instead (coaster brake.. aggh dust cover aghh. ), and mounted the sprocket on the freewheel. I did mangage to get the engine installed and running after a couple start attempts, the first couple times... then the fun began..
shut off the bike.
I notice that the fuel is leaking bad from the petcock..
The fuel petcock broke off when i tightened it (pot metal)! so i made a trip to a engine shop and got a nice replacement on/off and petcock (15$). Now, im ready to ride! So, I tweak the controls some and experiment with getting it to start.. I manage to get it start.. sometime. but after a half hour of riding and the bike sits off an hour, it does not want to start back up again. I thought maybe it was flooded,, so i took out the plug (wiped it) and walked the bike around,, and put the plug back in. . sometime this would work. sometime i would have to squirt a small amount of fuel in the spark plug hole to get the fuel going. ( i cant seem to tell if its too much fuel, or not enough.. although i try looking at the spark plug to see if its "wet", it kinda is not overly wet, but a little on the treads.
This whole story is long, so bare with me..
while checking spark plug..
My spark boot inside came out onto the spark and broke (brass piece and spring), so i went to the moto shop and got a ngk replacement (3.00$). nice. I decided to get a new plug to go with the new spark plug boot. (ngk b6hs)So I managed to get the bike started once, with the new boot (old plug z4c), after a half hour i turn off the engine and an hour later attempt to start.. nope. wont start.. why? then, I try to start in all ways, choke up, down etc. nope.
spark maybe?
I checked the spark plug boot and plug by riding bike along with plug out of engine while plugged into spark boot.. then allowed it(sparkplug) to touch engine block while i pedaled along.. i saw spark.. definately.;
so its not spark? right..?
magneto? i dont think because im getting a spark when plug is out of block.
it feels like when i go down a hill (let out clutch and peddle) that nothing is happening.. no spark> it wont pop.. which cant be. so i adjust choke up, down, nothing. i squeeze throttle some as well to test.. i looked at carb and adjusted needle notch settings.. nothing.. now it is not starting at all. 2 days
I am gettting so frustrated.. as many of you know
Im really stumped. I know the troubleshooting rundown, i havent had much luck with it. I need to triple check gaskets.. perhaps that is a problem,(air leak?) , but i am on my first gallon of gas/2strokeoil.
I rechecked all wiring and its good. kill switch works when engine is on, and needs to be shut off. its not the kill switch. i have even disconnected it to make sure.
and i havent driven the engine but maybe 10 miles max.
it drove fine when it started and ran, and did not let out to much smoke.. my fuel is 1 gallon to 6 oz of 2stroke oil
Im wondering if maybe the fuel line is creating a mild vaccum preventing free flow of gas into carb,, i read somewhere on here that a hole drilled in the top of the gas tank can eliviate vaccum in the line.
but, when i attempt to flood the bowl by pressing the tickler button for a couple times im sure there is gas because fuel wants to come out of the fuel bowl, it doesnt want to start. after i tried to open up the fuel bowl and let all of the gas out, empty, it still doesnt start. flood or to dry? rich or lean? nada.
I have adjusted the needle in the carb also, but putting it at different notches on the black washer. no luck at all.
I am aware that you need fuel, air and a spark.
which one am i not getting? the spark works when tested, but wont fire in the block. doh! no popping. doesnt even try to start.. just hear the chain turning the gear.
The gas/oil is in the line and full. The petcock (new) is open, and the (paper inline) fuel filter loaded up with gas/oil of course, and fuel bowl fills fine.
The choke is set into the up postion. to start, I have also tried bringing the choke down a little to allow more air in the engine,, no luck.
If i take the spark out and walk the bike with clutch out, the piston is pumping and making its "compression" noise. so, I think the engine piston is fine. (i also just tightened the head bolts yesterday a little to make sure) I do that to clear out any fuel in the block when i think its flooded. I just walk it for a couple minutes max, sparkplug out. To dry up some fuel.
I have enjoyed the couple times i was able to fire up the bike and ride it.. what a rush! and everybody who sees it says "whoa!, thats sweet!".. i like that.
I have also been reading the helpful posts on motoredbikes.com and they have helped. however, i am stumped
If anyone thinks they can help or would like to share please do. ride or die!
and thanks for having me in your forum. I am new so i apologize if i posted to much here
-nik in northcarolina
Attachments
Last edited by a moderator: