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Post by bobf on Apr 2, 2012 14:20:57 GMT -6
Oil retention in the crosshatching created by the honing. At least that is what it says in this article. .aa1car.com/library/honing98.htm" rel="nofollow" target="_blank"> .aa1car.com/library/honing98.htmEngine Cylinder Bore Honing Copyright AA1Car When an engine is rebuilt, the cylinders usually need attention. Wear tends to create taper in the upper part of the cylinder that can reduce ring sealing and increase blowby and oil consumption if not removed. The cylinder may also be out of round, scored or have other damage that requires correcting before a new set of rings will seal properly. The main objective when refinishing the cylinders is to make the walls as straight as possible (no taper), the bores as round as possible (minimal distortion, which is especially important with low tension rings), to have the right amount of crosshatch for good oil retention and ring support, and to produce a surface finish that meets the requirements of the rings. This is done by boring and/or honing the cylinders in one or several steps with various types of abrasives (vitrified or diamond). After honing, the cylinders need to be cleaned remove residual abrasive and metallic debris that is left in the bores. Washing and scrubbing with warm soapy water will remove most of the unwanted material. But washing alone does not loosen or remove surface "swarf" such as torn or folded metal that can wear rings and delay ring seating. The only way to get rid of this material and smooth the bores is to "polish" the bores after honing with some type of flexible abrasive brush. |
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Post by bobf on Apr 1, 2012 15:48:56 GMT -6
Yes look like that Helix. Now the other issue is that I live in Mile High City Denver Colorado. Now I put in 1.8 gallons of 91 Oct. ( shell ) I ran 105 miles and thats about 58.333 miles per gallon. I did do some freeway driving at around 65 miles an hour. I thought this scoot would get better miles than 58 miles for 1.8 gallons. I can smell a little gas. So Im assuming that its running a little rich for the altitude. My question: If I need to have the air and gas mixture on carb retuned what kind of motorcycle shop would I goto to have the carb adjusted to the altitude? Unless they have changed the tank it should hold about 2.3 gallons total. I once lived, for 27 years in Longmont, a half hour or so north of Denver. My son still lives in Fort Collins and my daughter lives in Lakewood. Eleven years ago I moved to Cortez in the four corners area at 6,300 ft. A year ago I bought my scooter and did as much PDI as I could in freezing weather. Now this summer I hope to redo the PDI, do it more completely, and fix some problems as well. When I do I hope to develop a photo and narrative for the efforts. I now live in Arizona as the doctors said I must get off the mountains or start carrying air tanks. My scoot ran fine in Cortez but when I moved to Arizona in December 2011 I had to re adjust the idle speeds. It runs pretty good right now For living in Denver and running on the interstate I say you have much courage. I have always considered I-25 to be filled with some very aggressive drivers and they do move very fast, if they are not stopped by some wreck or traffic jam. I envy your position and do miss living in Colorado. I am a low mileage owner today but hope to get more riding as my health continues to improve. Welcome to the forum and enjoy your ride. What little I have used mine was really pleasant. . |
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Post by bobf on Apr 1, 2012 14:08:54 GMT -6
This will be interesting as it does sound just like my scoot. That little cover over the engine just does not seem to be big enough to do valves and spark plugs. Looking forward to JR's suggestions on how to do that work through a 2_1/2"X4" hole. Not sure if my hand will fit through there.
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Post by bobf on Apr 1, 2012 11:10:02 GMT -6
I have a 2008 so things should be similar.
Look on the tags installed under the seat. Lots of information there.
Tires on my tag said 36PSI for both tires.
Did you open the little cover over the engine? Right next to the information tags on my machine. Look down inside the hole and you will see a spark plug. Looks difficult to service but when it is time I will figure out a way. I lean a lot to 'If it isn't broke, don't fix it.' But I also do a lot of preventative efforts.
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Post by bobf on Apr 1, 2012 10:55:20 GMT -6
I have a 2008 Jonway yy250t and the headlights do not come on till the motor is actually running. Nothing just by inserting the key and turning it. Get it running to see the headlights come on automatically and they stay on till I shut down. I don't know about 2007 but I don't think they would be that much different.
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Post by bobf on Mar 20, 2012 18:26:34 GMT -6
There is another material by Dupont for high temp and chemicals like gas and oil. Often used for orings in cars. It is called Viton. Google Viton and you will find plenty of links.
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Post by bobf on Mar 17, 2012 10:14:58 GMT -6
Try an auto store or repair shop and find what they use to hold door seals onto body parts.
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Post by bobf on Mar 14, 2012 14:58:25 GMT -6
Thanks for this information. I kept trying to understand why one piece, now I know.
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Post by bobf on Mar 11, 2012 11:40:34 GMT -6
Well, I am 78 today and supposed to achieve 95.
Maybe if I survive the current problems with my kidney stones. Two extracted last Wednesday and many others crushed by the sound methods. Doctor said I many need to come back for more efforts later. I would rather no more problems at all.
On narcotic pain relievers again. At this rate the scoot will be 10 years old and less than 100 miles on it. Maybe I should just start a 10 year long PDI. I am going to ride as soon as I get off these pain pills.
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Post by bobf on Mar 6, 2012 19:43:33 GMT -6
I guess what I have is labeled a GY6 on it, don't really care if it is Honda or CF Moto as it is a vertical engine. Apparently you don't care what Roketa calls them but it does make more sense that all this nonsense about A or B. I wish I could really understand all I read about scooters on the web sites. Seems to be lots of different stories no matter where I look.
My mistake if I said Honda to the poster. I was just talking vertical motors vs Linhai. Just more of my confusions. Where are the stories about the Honda parts for fixing this vertical motor. I was led to believe it was a Honda clone, not something else. CF Moto is a water cooled engine source. But also was under the idea they had permission from Honda to build this engine. Similar to Yamaha and Linhai agreements to build engines. Oh well. JCL, Roketa, Jonway, and others all seem to be working the same factories. Such a mess it is.
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Post by bobf on Mar 6, 2012 19:18:00 GMT -6
Nope Sorry Bob you can argue this all you want and there 3 owners of an exact scooter just like your's on this forum that will tell you you have the 244cc Cf Moto clone known better as the YY250T scooter or the MC-54-250. It has a fuse box. The 250B has no fuse box, own one and also the 250A no fuse box. The 250B and the 250A has the lnhai and that is what Richard's scooter is the linhai. The linhai versions don't have all this fuse box stuff and has the larger stator and no charging problems like your Moto version. Also has the fan located in front of the gas tank and has none of the cooling issues like on the Cf Moto version. scooterdoc.proboards.com/index.cgi?board=250cc&action=display&thread=5891&page=1This lady here has the 250A and it is linhai own one of those too an exact copy of the 250B with the linhai again own both, no fuse box, and Richard you will find both fuse just like I told you on your scooter. She doesn't need to look for a fuse box because she doesn't have one. One more time if the 20A fuse on the starter relay blows the scooter is dead period! We have the correct wiring diagram for each scooter in the tech section and it's original unlike the ones that others copy. JR JR, I have the Roketa MC 54 250B, It has the Honda clone 244 cc engine that I always say it has. It has a fuse box. Roketa does not even talk about 250 A or B. It has these machines listed under different ID's in its catalogs. First this is the Honda clone machine. .roketa.com/product/product_support.jsp?cateID=2610&sonCateID=0&proID=2658" rel="nofollow" target="_blank">.roketa.com/product/product_support.jsp?cateID=2610&sonCateID=0&proID=2658 and it's part list showing the engine used. It is called MC 54 250 Second is the Lihai machine. .roketa.com/product/product_support.jsp?cateID=2610&sonCateID=0&proID=27312" rel="nofollow" target="_blank">.roketa.com/product/product_support.jsp?cateID=2610&sonCateID=0&proID=27312And it's parts list showing the engine used. It is called MC 54B 250 ........................ My machine is a MC 54 250B. Please don't tell me it isn't what my machine is called. And it does have a Honda clone. It also has the YY250T badge on it. Way too much confusion over the 250 A & B and not actually recognized by Roketa. Have your friends check their 54 to see if a B is also there. That seems to be the way Roketa identifies them. And for the tomorrow and maybe longer, I will be in the hospital for a roto rooter procedure followed by a kidney blast to break up more of those rambling rocks in my kidneys. How do I get rid of that unreadable attachment of my mfg plate? I don't remember even putting it there. . Attachments:
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Post by bobf on Mar 6, 2012 11:50:44 GMT -6
I have a 2008 MC 54 250B and it has a fuse box. Lift the seat. Remove the battery cover. On the left side of the battery, at the rear of the battery is a small rectangular box about 1 1/2 inch in size. Pry the lid off and inside are 4 active fuses and two spares. All 1o amps.
Front fuse = light
Second = horn, meter, winker reply
Third = brake switch
Fourth = cooling fan
That is the label that goes with them.
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oil
by: bobf - Mar 5, 2012 15:28:37 GMT -6
Post by bobf on Mar 5, 2012 15:28:37 GMT -6
Well, I would think it to be loose like 5W when it is cold and tough like 50W when it is hot and working.
Is this an aircraft grade oil?
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Post by bobf on Feb 26, 2012 8:00:03 GMT -6
You have just hit on a important item. Self reliance. Something missing in today's life style is planning for the future.
As I was growing up we were told the Social Security system was NOT a retirement program and we should plan for our own retirement. In other words we should have a savings plan, about 10% of earnings, going into some sort of plan for our future cares. Today we have far too many of our younger folks brainwashed into thinking it is our governments responsibility to take care of us, to plan for our retirements, to pay us to be unemployed, and lots of other really unneeded entitlements.
What will we do when our country runs out of ways to pay these expenses or pay down our debts? It is coming, just wonder when. For those prepared. they will have a basic need of shelter taken care of. The needs of the day will then be up to the person to figure out Grow your own if possible. Do as my father had to do and work a day for a bag or two of potatoes. If nobody in numbers are working there will be few if any taxes available to support all these promises being made by the government. We really need to get back to the basics once again.
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Post by bobf on Feb 25, 2012 7:49:10 GMT -6
That looks good to me. Might help a lot when I start my next tear down. I already see that I forgot the side panels under the foot rests on each side in my brief outline. I would never suggest that anyone follow my original effort of removing the foor panel first. Real difficult to do and replace.
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