I finally figured out my compression problem, the head I got was no good so it got replaced with an old one I had.
Now I can get it started but and I can rev it up on the stand but as soon as I try to ride it, it will take me about 50ft then die. The warmer the engine is the worse it gets.
suggestions?
Setup: 14.3mm bored bing #70 jet, 14mm intake, stock #4 cylinder (new rings), boss pipe.
sure there is plenty of fuel? the bowl might have enough to get you going but then dry up and the bike shuts down.
start simple.
like Shawn said, is your gas on?
how does your plug look (too rich or lean)?
It has gas. I just cleaned the carb. Its only run about 100 ft, I don't think thats enough for a reliable plug reading.
Bad condensor? They get worse as they heat up...will it die on the stand as well as under load?
condenser only has a few hundred miles on it.
gas cap vent?
clogged jet
choke slide drop off of throttle slide where the tab is ?
if you didn't replace the HT coil with a one pole and hardwire it could be the tail lights brake sensor/light or horn malfunctioning
1. Bored carb not shimmed right/air leak?
2. Carbon blocking exhaust port?
3. #70 Seems high, possibly running too rich.
4. #64 is the biggest stock, say +2 for exhaust = 66, be safe, try a 68, see how it works, than 66. if you are running no airbox, 68 for sure.
5. ?????
6. Profit!
stock jet was 51
Bored bing is your problem. Get a real 14mm bing
1. When boreing, I didn't touch the clamp part of the carb body.
2. It has pretty much a new pipe on there.
3. probably so, I lost my bing jets somewhere so all I had was a 48, 54, and 70. I ordered a 60s range (+58).
4. 68 sounds like a better starting point.
5.!!!!!!!!!!
6. People
roffman,
Whats wrong with the bored bing? I looked down the venturi (i think that what its called) and the slide is sitting fine on the bottom of the carb. There is a very minimal amount of material that was removed from the bottom of the carb body.
Bump for rechecking my timing. It couldn't be more by the book, 0.016 in gap at 18 degrees BTDC.
I took off the carb and noticed a decent amount of gas between the intake and the clamp on the carb, that seems suspect to me. I am going to get an o-ring that fixes that.
Would it be a bad idea to try out the 54 jet or should just wait for my new jets?
Bump.
Its hardwired. Jets aren't clogged because Ive been switching them out. I took out the choke because i never used it anyway. HT coil is new.
have you checked for air leaks? i would think even with a nasty leak you would make it more than 100 ft though...
if you are positive it isnt gas related then the only other option for a fault would be spark/electrical.
do you have a spare coil/stator/condenser to try?
Bored bings unless done perfect. Sized perfect ( 14 mm 15mm ect.) not goofy between sizes (5.4mm 14.7 mm ect.) and use correct atomizer for size (#222-217 for 14 mm #217-215 for 15mm) are hard to jet, don't idle good and just don't run good through the range. See if your choke is locked on the lever correctly if not it will open when throttle is opened and close when throttle is closed killing the engine. I run 72 jet with 222 atomizer on #2 open port 2 hp topend. Every # 4 puch cylinder I had was a slow 1 hp with a restricted intake exhaust port. Your not going to go anywhere with that topend get a 2hp one
I matched the intake. But can I simply open up my exhaust port to match the bigger header on the boss?
Yes I always match ports but if you have a restricted 1 hp cylinder with the washer thingy on the intake you got a lot if porting work to do cause the ports are tiny inside the cylinder too
As long as the intake port windows area is > the carb area (area of 14mm circle) I should be good.
I think you must be thinking of a different cylinder. Mine has a decently large trapezoid intake. No washer thingy.
It actually seems like the #22 High torque cylinder has a smaller intake than the #4. I got an extra cylinder from a friend, so I will port the cylinder tonight to see if that helps at all.
Bump. Its not the carb. I switched it out for a working non-bored carb with a 58 jet. Still had the same problem. I can only get it to run briefly. It will run for 5 seconds maximum but after it runs at all it wont start at all for a while. I'm perplexed.
Anybody? I am stuck. We know for sure that is not:
carb
timing
fuel flow
compression
It seems like it will start up for like 1 second now, then it will flood immediately and not start back up for awhile. Please help.
sounds like the safety feature one of the bulbs, brake sensors, horn or bypass was backward could be the wiring on the ht coil-ground, blue wire, the taps pullin out, but with the carb flooding i would say its the float or your needle not seating or your carb slide isnt connecting with the choke and the choke slide may have fallen or your choke is down when for the bing its pulled up for off try putting it back in you said you took it out i think it may have to do something with the idle circuit it would seem like the next logical step...
I don't have the choke slide its lost and long gone. I could try putting my hand over the air intake.
How does a needle not sit correctly, its either in there or not right?
I accidentally trapped the wires coming from the tail light between the frame and the E50 when I mounted the engine. I will drop the engine and fix that maybe thats grounding out there and making it not work right. However my spark is strong so I don't see why.
Also would my engine immediately flooding be cause by a incorrect float level. I looked at the float it seems set right, but when I put the leaky 12mm bing in there, it F'ing pissed gas all over the place.
its the little needle in the float assembly, not the throttle needle, not seating due to debris or wear
or the float not floating or bent. the throttle position at idle it should look like a square hole when set right then adjust the throttle adjuster to get the idle right, but the grounded wires is the main culprit.
happy motoring...
Well problem solved. I am not sure what happened but I put in the smallest jet I had 58 and it puffed out a bunch of smoke. It was super lean so I went up to a 68 and its running pretty good. The problem I have now is that the richest setting on the needle is too lean. Is there anything I can do about that?
run a higher ratio of oil, replace your fuelines with bigger diameter ones, rely on a petcock intank sreen and the banjo filter, ditch the restrictive inline ones. bend the float ever so slightly to get more in the bowl and/or goto a 71 jet
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