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Post by apothecary on Dec 10, 2011 10:09:08 GMT -6
I actually think the studs were pulling out because of the previous owner/work that was done to the bike. Unfortunately this weekend has proven to be more than hectic with me having to get A LOT done here because of a new property manager (long story) so I probably won't get a chance to work on it until later this week at best.
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Post by apothecary on Dec 9, 2011 15:17:28 GMT -6
Well, so much for THAT idea... Started working on it, replaced the gasket (1/2 of it was missing) went to put the studs back in and the hole in the head stripped out. I have a feeling it's part of the reason it kept backing out. So I'll be heading to a friends place tonight with the bike to get the hole helicoiled. Hopefully I'll get it done tonight or this weekend. So much to do never enough time.
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Post by apothecary on Dec 8, 2011 20:54:42 GMT -6
Unfortunately it's the studs that keep loosening. They keep backing out of the head. I'll have to take the nuts off and give it another go probably have to check the gasket too. I'll take a look at it tomorrow morning but it's always been the studs coming out of the head I just didn't know if threadlocker would work on that or not. I have red threadlock here I'll give it a shot see how it goes
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Post by apothecary on Dec 8, 2011 12:07:10 GMT -6
Wait, are we talking intake side or exhaust side? I have the intake coming and yes my exhaust ones seem to keep loosening like every time I ride. Can I use threadlocker on them?
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Post by apothecary on Dec 7, 2011 14:23:33 GMT -6
Where is the pipe flange? Are you referring to the intake pipe? I'm replacing that just waiting for the new one to come in (on backorder). The popping doesn't happen until I've dropped some speed then it pops every few seconds until the clutch lets go and it hits idle again. Then when I shut down it does one little *Puh* a couple seconds after I stop the engine.
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Post by apothecary on Dec 6, 2011 14:44:58 GMT -6
Ok I've adjusted the idle. It's JUST below the point where I feel the bike want to start moving when sitting without brakes on. I'm still getting some popping when I let off the throttle and it's still giving me a *poof* sound a few seconds after shutting the engine off after actual ride time (not so much when it's not been under load). Do I need to let the air mix screw out a little further? Or should I pop the carb top off and see if the needle has an adjustment I can make on it?
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Post by apothecary on Nov 30, 2011 19:36:31 GMT -6
That's probably part of the problem then. Even with the low idle it's got now, the back tire still spins a little. I'll have to see if I can find a cheap tach to put on it for idle setting purposes.
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Post by apothecary on Nov 30, 2011 16:38:30 GMT -6
Ok I sprayed starter fluid all over on the carb, the vac lines, the intake, etc. NOTHING. So I think it's fairly safe to say the intake and vac lines aren't leaking at all.
I twisted the AF screw out 1/2 turn as you recommended. It still seems to be doing about the same. The problem isn't noticeable much when the engine is cold but when it warms up coming down from speed the pops and backfiring is still there.
I didn't get a video of it today. I did the adjustment and during the ride it was just too freakin cold for me to try getting video. By the time I got home, I just wanted to get the hex inside.
I do think I need to bring the idle up a little bit. It stalls out when you first start it with the idle where it is. I didn't check the air cutoff internals yet I may take a look at that tomorrow.
I haven't taken it up to speed yet the most I've done was 50 and she feels fin to that point. I know when I first start her if I have her on the center stand, I can rev the engine up then it drops RPMs I'm not sure if that's something being done by the CDI or not since after it drops the RPMs it won't get back up to that higher RPM again.
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Post by apothecary on Nov 29, 2011 14:38:51 GMT -6
Alley,
Reading your descriptions at the beginning, it's a backfire. I have another video of what it's doing now. I think part of the issue is that one of the exhaust bolts loosened itself on me. I'm tightening it up again hopefully it's not destroyed and needing replaced already. It's got less than 30 miles on it so far.
You can hear it about half way through when I let off the throttle. It's a nice popping/backfiring. I'm not sure the difference between the two I guess. Let me know what you think it is. That way I can hopefully start properly diagnosing things.
Ok uploaded the video. If you listen to the beginning I had the throttle wide open and it pops a little there but about 1/2 way through the video, I let off the throttle and you can hear the really loud popping/backfiring.
Also at the beginning you can here it's running full then the RPM drops slightly. That's not me letting off the throttle that's what it seems to do EVERY time. Gets up to a high RPM then drops slightly.
As for the deceleration hoses, I'm not sure which ones are the decel hoses but I reconnected everything just as it was when I took the old carb off.
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Post by apothecary on Nov 28, 2011 11:54:34 GMT -6
All right, I installed the new carb. MAN she runs a WHOLE lot better. There's no pop after shutting the engine off and the idle sounds alot smoother. The acceleration is right back to where it should be. Throttle response is smooth. The only issue I'm still having now is a popping when I let off the throttle and a feeling when I drop down to a certain speed of the clutch? letting go of the wheels finally and allowing it to coast. I think this can be partially the cause of the popping on decel? Once the clutch lets go the engine drops to idle and doesn't pop anymore but until then it pops every few seconds on deceleration.
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Post by apothecary on Nov 25, 2011 9:11:57 GMT -6
Ok I can't get the cap of the af screw. Guess I will be replacing the carbb after all. Also a symptom I'm noticing is when I shut it off after running for a bit, about 3-5 seconds after the engine is stopped, the exhaust let's out a nice little pop. Not sharp like a bang or anything but a harder poof type sound like the sound right when a morter type firework is launched. It happens only once each time the engine is stopped.
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Post by apothecary on Nov 24, 2011 17:00:52 GMT -6
I was afraid of that. Ok well I have a screwdriver set that has a ratchet handle should make it easier. I've also replaced all vac lines with equivilant sized silicon lines. Though what's with the line from the thermostat to the carb then from the carb towards the front of the scoot? Is it supposed to have coolant in it? Or do I have some sort of leak?
I'll attempt to adjust the carb in the morning. I rode her a bit and she hesitates from a stop and pops when slowing down. I also noticed at 20 mph when running steady at that speed it feels like the clutch isn't fully engaging or something. Maybe 20 is the threshhold speed where it doesn't engage yet?
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Post by apothecary on Nov 24, 2011 11:14:17 GMT -6
Ok I can't find the fuel mixture screw. I tried looking and can't even find the cap that you're supposed to remove to get to it... The only thing even remotely close to an adjustment I can find other than the idle, is towards the engine side but underneath. Not exactly easy to get to and the way it's set up there isn't ALOT of adjusting that can be done. I'll snap a shot of it in a bit see if it's the right one.
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Post by apothecary on Nov 21, 2011 13:17:03 GMT -6
Ok update.
Replaced the intake manifold gasket (ordered 5 just in case). That seems to fix the hard start as well as most of the popping so far. I haven't taken her out on the road yet since I've changed the gasket to a proper one but I have taken her for quick little zips in the parking lot at my apartment.
She's still hesitating on takeoff. I also noticed on the center stand, if given full throttle, she'll get up to what sounds like full speed then drop down then come up and drop down etc.
I'll go out tomorrow (maybe later today depending what the weather does) and take another video of it so you can hear the up and down. I think it's still got a little bit of a POP when it comes down from throttle at the very end when it hits idle. But it's just a single pop now not nearly as loud as it was prior to changing the gasket.
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Post by apothecary on Nov 17, 2011 15:11:53 GMT -6
All right replaced some of the lines (ones in the vacinity of the carb) it's GOt to be that gasket/intake. I'll have to wait till the new gaskets get in then I'll know for sure. I've also ordered a new intake just to be safe.
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