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Post by cruiser on Apr 27, 2012 21:10:16 GMT -6
No one likes the yankee's thoughts/ideas Would you like to clarify this post, John? |
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Post by cruiser on Apr 27, 2012 20:45:22 GMT -6
Anyone tried/opposed to running straight water (or maybe a 90/10 mix) and an additive like hyperlube/water wetter/purple ice? (to add lubricants needed for water pump.) I know that type of cooling is required if you race (so you don't mess up the track w/antifreeze in the event of a wreck.) If you're not in freezing temperatures... think that would help.. after he gets the burping done? Been considering this myself. Antifreeze does more than keep things from freezing. Antifreeze mixed with water to a 50/50 mix will give the optimum protection against freezing and also raises the boiling point of water which is good for hot running engines. Antifreeze solution also has rust and corrosion inhibiters to protect the inside of the engine and the cooling system. It also has lubricants for the water pump seals. I believe the antifreeze solution is also capable of transferring more heat out of the coolant than straight water. |
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Post by cruiser on Apr 26, 2012 20:03:43 GMT -6
A 50/50 premix coolant like Prestone is best for water cooled scoots. Many of the auto parts stores carry their own brand of coolant and they will work fine. Like JR says, burping the system is critical to proper performance.
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Post by cruiser on Apr 26, 2012 19:56:20 GMT -6
Thanks Cruiser, that is what I was kinda looking for but wasn't sure about the pressure values for the scoot. I am fixing to do a lot to my scoot as far as taking it down and replacing and repairing lots of the plastic. I would like to get all the under plastic stuff done at that time instead of having to take it all down again. You're welcome. Here's what the pump install looks like on the YY250T:  |
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Post by cruiser on Apr 26, 2012 19:16:02 GMT -6
I have the YY250T (Honda clone engine) and the original equipment fuel pump is the same as the 257cc scoot. I replaced my vacuum pump with a 42S electric fuel pump which has the lower fuel pressure. You won't need a pressure regulator with this and it delivers more than enough fuel under all conditions. Very useful when the scoot has not been running for a long period of time and the carb may be a little low on fuel. I have had no problems with my install. Here's one on Ebay which has less then 2 days before the auction ends: compare.ebay.com/like/320893762880 |
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Post by cruiser on Apr 26, 2012 18:44:01 GMT -6
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Post by cruiser on Apr 26, 2012 18:34:12 GMT -6
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Post by cruiser on Apr 26, 2012 13:04:58 GMT -6
Being 69, I was a teenager looking for my first car during the late 50's and early 60's. First car was a 54 Chevy. So, I was just the right age to be car-aware of the 50's models.
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Post by cruiser on Apr 26, 2012 12:56:55 GMT -6
Good advice, ironwire. Welcome to the forum. You should log into the new students section when you get your new scoot. We would like some pix and if you have any questions, we will do our best to answer them.
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Post by cruiser on Apr 26, 2012 0:46:17 GMT -6
100%   |
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Post by cruiser on Apr 24, 2012 21:26:48 GMT -6
Can I install the new muffler for now then just weld this on later from the old one? I'm assuming this is needed to pass CARB in Cali which is already has. CARB qualification is determined at the manufacturers level. So the scoot already has been certified and should be identified by a ID plate somewhere on the scoot. It all depends on what California does for individual scoot safety inspections. I know that in Massachusetts, there is no checking out of the emissions devices especially since there is no CPU on the scoot. I would think that California is the same way? |
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Post by cruiser on Apr 24, 2012 21:21:08 GMT -6
Ok so it's really not needed? There is no new muffler out there which has this valve It works only at idle and is inoperative at full throttle. Apparently it makes no difference to the operation of the scoot and is strictly to help emissions. So it looks like it is not needed for proper operation of the scoot. |
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Post by cruiser on Apr 24, 2012 21:05:03 GMT -6
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Post by cruiser on Apr 24, 2012 17:41:30 GMT -6
The YY250T-2 has a radiator. It has coolant. And yet it considered air cooled? And how can his be a GY6 then if it is 250cc, and the GY6's only go up to 150cc? Yes, more confusion. Some of these parts dealers keep referring to the YY250T-2 also as a GY6, with parts that are supposed to fit the YY250T-2. Dave tried emailing Jonway to ask about a service manual, and not only will they not email him back at all, but you can't access those manuals unless you are a dealer.  Chinese scoots can be a little confusing: 1. The YY250T-2 is water cooled contrary to the description on the Jonway site. 2. GY6 is a term used for the family of older Honda 50 to 150cc engines. Some vendors use the term for all Honda clone engines. Here's another description of the GY6 family: .scootertronics.com/hondagy6engine.html" rel="nofollow" target="_blank"> .scootertronics.com/hondagy6engine.html3. Some use the GY6 descriptor for any Chinese clone scooter engine. I have even seen it used for the Linhai clone which was designed by Yamaha. 4. I know of no service manual in the wild for the Jonway maxi scoot (250cc or larger). I wonder if there actually is one even for qualified service personnel. Most people use the service manual for the Helix for the 244cc Honda clone engine. The Yamaha YP250 service manual is generally used for the Linhai clone 257cc engine. The YY250T and MC-54 bodies and frames use the Honda Reflex service manual for the plastic layout and some of the hardware. There are several different wiring diagrams which can be found in our technical library. Most of these diagrams are adapted from generic diagrams since there are very few 100% accurate diagrams originating out of China. |
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Post by cruiser on Apr 24, 2012 15:29:12 GMT -6
JR, could you possibly explain what the "GY6" designation actually means? That is another source of confusion for me. Here's a pretty good explanation of the GY6 family of engines. en.wikipedia.org/wiki/GY6_engineNotice that they are air cooled and 150cc or smaller. They are based on an old Honda design. |
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