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Post by Elektrey on May 16, 2015 22:47:19 GMT -5
I dare not go below 89, I once used 87 and it seized on me. ill go lower the idle a little and see that was with the previous air filter which was more free flowing. This one doesn't let in as much air by observation.
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Post by sai on May 16, 2015 22:49:56 GMT -5
True, I called the shop and I told them to give me back my old one to test.
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Post by fe53series3 on May 17, 2015 19:45:41 GMT -5
The first thing to understand:When you get your bike back from a shop in worse condition than when it went in....... they caused the problem. Second thing to understand:They will never admit to causing the problem. Third thing to understand:They could fix the problem that they caused, but this will cost them money (in time) so refer back to the Second thing to understand. So what's the problem?Fuel is dripping from the carb into the airbox. There is only ONE reason for this. The fuel needle valve is not seating correctly. Other than a split fuel line..... there is NO OTHER possible reason. The fuel enters the carb via the needle valve. If the needle valve closes...... all fuel flow is stopped. If the needle valve doesn't close...... fuel will continue to flow out of the carb, into the airbox, until the tank is empty. Solution:Remove the fuel bowl, float, and needle valve. Examine the needle valve conical tip under a magnifying glass. Are there ridges/grooves in the plastic? If there are.... then apologies to the mechanic...... order a new needle valve. If the conical tip is sweet.... then blow out the needle valve bush, to remove foreign bodies. In extremis you could safely re-seat the bush using this method (I had this problem and it worked a treat). 49ccscoot.proboards.com/thread/12141/repair-reseat-needle-valve-method
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Post by sai on May 17, 2015 22:11:59 GMT -5
Thank you, so far since I down jetted it hasn't died yet, but when I have time, I'm going to look at the needle valve. For now there is no more fuel dripping from the filter box and I need to check the spark plug
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Post by sai on May 31, 2015 3:39:07 GMT -5
Ok, this is getting frustrating, I thought that my bike is running pretty well now, but on random occasions, it loses speed and power and just slows down and finally dies.
WHat does this usually mean?
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Post by 90GTVert on May 31, 2015 5:10:33 GMT -5
Heating up and soft seizing (leak, improper jetting, cooling prob), some type of fuel delivery issue, weak/failing ignition.
You can rule out the ignition quickly if you can access the plug easily. Carry a spark plug wrench/socket and check it for spark just after it dies. If there's no spark you found the problem, or rather narrowed your search to ignition components and connections. If there's spark investigate the others. You can also look at the plug while it's out to see if it's wet or dry. It should be wet if there's no spark or weak spark, because fuel is being delivered and not burned. Dry would point you to fuel delivery, jetting, air leak.
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Post by sai on May 31, 2015 10:47:12 GMT -5
1. How do you check for spark? 2. I remember that at the time the fuel meter is at the red bar, so I refilled to full, open the choke, let it run and slowly, it starts to regain power.
3. How do I rule out the ignition? And yes, I can take the seat off and unscrew the spark plug, but how do I check?
4. 1/2 the time the electric starter won't do anything, so I had to kick start and it can take a couple of kicks to get it running.
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Post by 90GTVert on May 31, 2015 11:12:27 GMT -5
1&3 : youtu.be/LogSfY7NhkQ2. You said on random occasions, so has this happened a lot or did it keep happening before you had to fill up? At that rate it may be lean because the pickup/outlet of the tank wasn't able to get fuel in it to supply enough to the carb at that point. 4. E-start won't spin it over or it won't start the engine?
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Post by sai on May 31, 2015 11:32:09 GMT -5
2. It happened 3 times since I opened this thread. The very first time was at only 12 miles and the engine died , I couldn't start it until I put a dry plug. The plug was wet and fouled. Then I went from a 91 jet and BR9 plug to an 89 jet and BR8HSA plug. 4. It won't start the engine at all, it does nothing at random times. 5. And yesterday when this happened, I was riding in a 50 degree weather. 6. Here is the plug photo I took just now before even starting the bike first. Sorry a little blurry, but I notice that the screw area was still a tad wet. THe ceramic white part with the prong sticking out is kinda brown. 7. I took the bike for a 2 block ride just now without warming it up, seems like I lost 5mph on full throttle.
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Post by fe53series3 on May 31, 2015 15:38:32 GMT -5
Heating up and soft seizing (leak, improper jetting, cooling prob), some type of fuel delivery issue, weak/failing ignition. You can rule out the ignition quickly if you can access the plug easily. Carry a spark plug wrench/socket and check it for spark just after it dies. If there's no spark you found the problem, or rather narrowed your search to ignition components and connections. If there's spark investigate the others. You can also look at the plug while it's out to see if it's wet or dry. It should be wet if there's no spark or weak spark, because fuel is being delivered and not burned. Dry would point you to fuel delivery, jetting, air leak. Just dittoing 90GTVert. Particularly "carry a spark plug wrench"...... and use it. During setup, I couldn't imagine testing without a wrench and a spare plug. On the plug..... I this the correct plug??? ... it's just that this doesn't look like the right plug. If this is the designated plug then fine....... but every plug I've seen for small cap 2 strokes, is 'non-projected'. Your pic shows an 'extremely projected plug' (electrode gap projected deep into the combustion chamber). Obviously this advances the timing..... the spark hits the vapour too soon, and creates an overheating condition. This will create a false colour reading of the plug. It means that you have no idea of the mix. Double check that you need this projected plug, as shown in the pic. The pic does not look like a BR8HSA plug.If it's correct, then fine.....
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Post by Elektrey on May 31, 2015 15:47:12 GMT -5
mine is projected, albeit not as much. it does look a bit odd. ^ BPR8HS for reference the extra 'p' is for projecting insulator, which If you look and compare the two seems to add up. I think hers is a BR8HS
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Post by fe53series3 on May 31, 2015 16:40:26 GMT -5
mine is projected, albeit not as much. it does look a bit odd. ^ BPR8HS for reference the extra 'p' is for projecting insulator, which If you look and compare the two seems to add up. I think hers is a BR8HS Cock on! The OP's pic def looked ultra projected. That elongated electrode smacks of 'specialist application'. PS Elektrey...... could you be a tad over oiling? If your plug condition is current..... it looks a touch oily. What do you think?
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Post by Elektrey on May 31, 2015 17:19:48 GMT -5
Yeah that plug is fouled. I fixed an exhaust leak and it ran way too rich without all the air coming in. Got a new plug coming in soon =)
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Post by scooterpimp on May 31, 2015 17:21:22 GMT -5
Elektrey , be careful of other dudes that say Cock On! Awkward Turtle! Lol.
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Post by Elektrey on May 31, 2015 17:28:15 GMT -5
slang from across the pond =p
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