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Post by sai on Jun 26, 2015 20:09:54 GMT -5
Well, looks like the power is back and so is the speed so far... I'm not sure what happened.
Just wondering, I had to fix the speedometer bracket with epoxy, and I noticed that the cable that measures the MPH is loose. I don't see a way to fasten the screw into the speedometer at all.
I can eyeball the 1 inch tip of it into the back of the speedo, but I just can't secure it... no even enough finger space.
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Post by sai on Jun 29, 2015 6:07:31 GMT -5
I was 50 miles away from home and behold... it wouldn't start, took the plug out (BR9HS) and it was tar black, I don't get it.
Luckily I had an old BR7HS plug and it's ok for now.
Could a too cold plug make the bike run a little rich and fouling the plug?
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Post by 90GTVert on Jun 29, 2015 7:23:08 GMT -5
If the plug is too cold it can't keep itself clean. It will start to foul and eventually make the issue worse as it misfires. If you have a rich condition the plug will run colder than usual and become more prone to fouling. As I said in a PM, instead of planning performance mods right now (or in addition to) I'd put part of that money into a compression tester so you know what you're dealing with. A compression test alleviates a lot of guesswork. If you tested before and then after some of the service you've done recently, you'd be able to see what you're accomplishing and possibly eliminate cylinder issues as a potential cause for all of this. THIS is one that I have. Sometimes cheap gauges have trouble, but so far this one has worked alright for me. You don't see a thread on piece on the speedo cable? Hasn't slid down the cable anywhere?
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Post by sai on Jun 29, 2015 13:02:03 GMT -5
If the plug is too cold it can't keep itself clean. It will start to foul and eventually make the issue worse as it misfires. If you have a rich condition the plug will run colder than usual and become more prone to fouling. As I said in a PM, instead of planning performance mods right now (or in addition to) I'd put part of that money into a compression tester so you know what you're dealing with. A compression test alleviates a lot of guesswork. If you tested before and then after some of the service you've done recently, you'd be able to see what you're accomplishing and possibly eliminate cylinder issues as a potential cause for all of this. THIS is one that I have. Sometimes cheap gauges have trouble, but so far this one has worked alright for me. You don't see a thread on piece on the speedo cable? Hasn't slid down the cable anywhere? I'm planning to stop by the Harbor Freight and get a compression tester for $20 hopefully. Sorry, what do you mean by thread on the speedometer cable?
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Post by 190mech on Jun 29, 2015 13:44:53 GMT -5
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Post by sai on Jun 29, 2015 14:43:58 GMT -5
Oh yes, I noticed. Problem I'm having is that the cable is VERY SHORT. I either not screw the speedo to the mount or let go of this cable.
There's no finger space for it. These kymcos don't give you much hand space to work, there's always something in the way b
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Post by 190mech on Jun 29, 2015 16:11:56 GMT -5
What about disconnecting the speedo cable at the wheel so you can pull it up farther to connect to the speedo head..You should try working on some late model Honda stuff,very poorly designed for a mechanic to access,looks nice on the outside though!
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Post by sai on Jun 29, 2015 20:35:43 GMT -5
I thought about that, but since I never pulled it ever I'm afraid if I do I won't be able to put it back on...
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Post by oldgeek on Jun 29, 2015 20:58:38 GMT -5
You should be fine removing it from the wheel, and getting it put back on. I just had to use that trick on my Kymco ZX worked like a charm. There was a screw I had to remove in order to pull the cable out of the front wheel. I just turned the tire while pushing the cable back into place and it went right back in.
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Post by triesandluth on Jun 30, 2015 16:03:55 GMT -5
Ive had a few bikes over the years get richer and slower with time,its usually the airfliter is clogged beyond cleaning,installed new filter,power back,original jet reinstalled..Another possibility could be a stuck/worn piston ring.. As I mentioned above, the air filter is brand new and it's been washed 2 times. Dawn and carb cleaner. Lightly oiled after cleaning?
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Post by niz76 on Jun 30, 2015 22:35:11 GMT -5
Well, looks like the power is back and so is the speed so far... I'm not sure what happened. Just wondering, I had to fix the speedometer bracket with epoxy, and I noticed that the cable that measures the MPH is loose. I don't see a way to fasten the screw into the speedometer at all. I can eyeball the 1 inch tip of it into the back of the speedo, but I just can't secure it... no even enough finger space. Sai, I was supposed to make that video for you showing the "hand hone method" So sorry! I got caught up in all the last minute details before flying up to Michigan for vacation that I just ran out time- Please forgive me! lol. We're back home now in sunny FL (Thank gawd!) so I promise I'll make it for you tomorrow! Honestly, at this point it probably won't make a huge difference. U said the power and speed seems to be back- I betcha those/that new ring(s?)- Don't remember if you have a dual ring piston or a single ring "race" piston- but I betcha the rings gradually seated themselves and that's why your power is back! You could still do a quick hand hone if you wanted to- like I said, might not make much of a noticable difference now, but at least you'll know what to do for your next new set of rings! When you see the video you'll see that it's very quick and easy to do!
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Post by sai on Jul 1, 2015 1:19:13 GMT -5
Hi
I'd appreciate the video. I'm still apprehensive about it, because I thought that if you shave the walls there'll be less compression with the rings? Mine is a dual ring btw.
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Post by niz76 on Jul 1, 2015 15:25:03 GMT -5
Hi I'd appreciate the video. I'm still apprehensive about it, because I thought that if you shave the walls there'll be less compression with the rings? Mine is a dual ring btw. Ok the video is done! When honing a cylinder you're not really removing enough material from the walls of the cylinder to affect the size relationship to the piston/rings- that'd be more like "boring out". The video is kinda long- longer than it needs to be!- but I did my best to give full details and explain thoroughly. Hope this helps! EDIT: Btw, if anyone notices any misquotes or misinformation that I'm giving please let me know! I've tried to explain things the best I can and as best as I understand these facts that I'm giving to be true... Did that make any sense at all???
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Post by 190mech on Jul 1, 2015 15:53:44 GMT -5
Great vid Niz!!Will want to clean the cylinder very well after the hand hone to remove the metal dust and sandpaper particles..Hot soapy water does a good job followed with WD40 and a white paper towel to test for cleanness..
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Post by sai on Jul 1, 2015 19:10:28 GMT -5
Thank you, Niz! I'll definitely do this tomorrow..
Still need to replace the muffler packing and fix the elextric starter and possibly replacing the old white contra spring -_-
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