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Re: I'm going crazy. Losing spark when hitting bumps/pitch d
Posted: Mon Sep 05, 2011 8:13 pm
by Chicago Ben
Trafficjamz wrote:Chicago Ben wrote:evilone wrote:Sounds like a possibility. Shorten that fuel hose.
I'm gonna try that out next weekend, I'm in the middle of another move , we all know how much fun moving is

Too long of a hose would not cause the problem you are having.
Ben, I really think this is an electrical issue. I can send a couple of parts your way so you can troubleshoot, if you want.
I appreciate that, I will cross that bridge if I have to - I didn't think a long fuel hose would make a difference either since an engine is nothing more than a pump - but why would this get more fuel when tipped a certain way? Only 1 way to find out which is to cut that fuel line to exact size.
Re: I'm going crazy. Losing spark when hitting bumps/pitch d
Posted: Tue Sep 06, 2011 5:54 pm
by SuprasNsprees
i had a perfectly running bike, but took the carb off to re-tap the mounting holes. put it back together , and now i have the same issue
time go out and start wiggling s*** , i guess
Re: I'm going crazy. Losing spark when hitting bumps/pitch d
Posted: Sun Sep 11, 2011 11:42 pm
by Chicago Ben
swapped in 52 pilot (up from 50) still running 125 main. Shortened my fuel line so it is direct into the inlet nipple. Still cutting out over bumps.
I bog pretty bad going from idle to getting on the throttle and nearly stall out if the bike is turning left or right from a stop
Once I'm on the throttle I'm great though and my temps are in a good range. Spiking at maybe 330 F
I might need to have someone send me a spare cdi here or maybe even a spare coil to see if that can at least eliminate my cutout on bumps issue.
Re: I'm going crazy. Losing spark when hitting bumps/pitch d
Posted: Tue Sep 13, 2011 12:42 pm
by Chicago Ben
does anyone think maybe too high of a float level can cause these symptoms?
aka the float is so high when I'm hitting bumps and or lean at low speed it somehow is dumping too much fuel into the intake causing a brief flooding state ?
Re: I'm going crazy. Losing spark when hitting bumps/pitch d
Posted: Tue Sep 13, 2011 12:50 pm
by swimmingfree
cood be??
if so i wood think if you held it that spot it wood go doa and you could pull the plug and see it..
swimmingfree
Re: I'm going crazy. Losing spark when hitting bumps/pitch d
Posted: Tue Sep 13, 2011 1:32 pm
by Chicago Ben
swimmingfree wrote:cood be??
if so i wood think if you held it that spot it wood go doa and you could pull the plug and see it..
swimmingfree
what would pulling the plug at that spot do?
Re: I'm going crazy. Losing spark when hitting bumps/pitch d
Posted: Tue Sep 13, 2011 1:56 pm
by swimmingfree
if you can kill it that way the plug shood be wet if its fluding i wood thing.. or just reset you flot ..
you no do the
3 Rear tire down from wood = dies or almost dies every time
swimmingfree
Re: I'm going crazy. Losing spark when hitting bumps/pitch d
Posted: Tue Sep 13, 2011 4:53 pm
by Chicago Ben
swimmingfree wrote:if you can kill it that way the plug shood be wet if its fluding i wood thing.. or just reset you flot ..
you no do the
3 Rear tire down from wood = dies or almost dies every time
swimmingfree
good point, I will check that thank you
Re: I'm going crazy. Losing spark when hitting bumps/pitch d
Posted: Wed Sep 14, 2011 1:36 am
by PimpinSpree
If its electrical, it will die instantly. If its fuel it will bog and then die. Sounds like its electrical from your description. Get a rubber mallott and start tapping stuff. You probably have a bad connection somewhere. Or you have a short somewhere and your ignition is grounding out.
Re: I'm going crazy. Losing spark when hitting bumps/pitch d
Posted: Wed Sep 14, 2011 7:36 am
by zuphilius
Bad coil? Or was this mentioned earlier?
Re: I'm going crazy. Losing spark when hitting bumps/pitch d
Posted: Thu Sep 15, 2011 5:46 pm
by Chicago Ben
I'm just going to have to suck it up and buy a new coil and cdi I think, I'll try a coil first by itself because that's not that expensive
Re: I'm going crazy. Losing spark when hitting bumps/pitch d
Posted: Thu Sep 15, 2011 6:40 pm
by Mystic
I think VTcycles has the cdi and coil for 37 dollars plus free shipping on ebay

thats what i wanna do when i get the extra cheese. if you buy both seperately it will cost at least 40
Re: I'm going crazy. Losing spark when hitting bumps/pitch d
Posted: Thu Sep 15, 2011 6:49 pm
by SuprasNsprees
I'm with you man. feel your pain
can't figure mine out either..
@ 1/4 throttle or less , a small bump will cause mine to want to die, and puff smoke out. idk if i'm losing spark or dumping fuel. tried wiggling every connection, hitting the coil.. nothing simulates the issue unless the rear of the bike is jarred . can pick the front up and drop it all day, and it won't die
@ full throttle it takes a good size bump/hole to affect it any
otherwise, it runs amazing (idle is a little screwy ) but it fires up cold immediately , and is very responsive at all speeds/throttle positions
Re: I'm going crazy. Losing spark when hitting bumps/pitch d
Posted: Thu Sep 15, 2011 7:02 pm
by evilone
Chicago Ben wrote:I'm just going to have to suck it up and buy a new coil and cdi I think, I'll try a coil first by itself because that's not that expensive
I think i have both if you're interested.
Re: I'm going crazy. Losing spark when hitting bumps/pitch d
Posted: Tue Oct 04, 2011 12:42 pm
by Chicago Ben
So here is an interesting find
I started the moped up the other day on a pretty cold day, about 45-50 F ambient and I could only keep it running with the choke on. I only ran it down the street 2 times. Yes I know you should not ride with the choke on. But during this ride, I noticed it did not cut out AT ALL over bumps. (bumps it would normally cut out on)
Just ordered a size 60 pilot. I think my pilot circuit is just starved for fuel? Does that sound right to anyone? I am almost positive my coil and cdi are fine. My jetting during this run was 52 pilot and 125 main. Again I am running a 52mm Ruima BBK , PG typhoon, 26 mm oko